Development of the Critical Values system redefined what STAT means in clinical laboratory testing turnaround times
Where did the concept of critical values and having clinical laboratories report them to referring physicians originate? How did the concept blossom into a standard practice in laboratory medicine? Given the importance of critical values, a lookback into how this aspect of laboratory medicine was developed is helpful to understand how and why this has become an essential element in the practice of medicine and an opportunity for labs to add value in patient care.
According to Stanford Medicine, critical/panic values are defined as “values that are outside the normal range to a degree that may constitute an immediate health risk to the individual or require immediate action on the part of the ordering physician.”
What you’ll read below is an insider’s account of the “birth of critical values reporting.”
According to Lundberg, an unaccompanied man was brought to the hospital in a coma and an examination revealed a laceration to his scalp. The patient was admitted to the neurosurgical unit where clinical laboratory tests were performed, including a complete blood count (CBC) analysis, urinalysis, and serum electrolytes. All the test results came back normal except the patient’s serum glucose (blood sugar level) which was 6 mg% in concentration.
“The hard-copy laboratory results were returned to the ward of origin within two hours of receipt of the specimens in the laboratory. However, the results were not noticed by the house officers who were busy with several other seriously ill patients. Ward personnel also failed to communicate the lab results to the responsible physicians,” Lundberg wrote.
When hospital staff did finally notice the test result the next morning glucose was immediately administered to the patient, but it was too late to prevent irreversible brain damage. The man soon passed away.
Following this incident, the hospital developed a “Critical Value Recognition and Reporting System.” The system generated new numbers that were termed “Panic Values.”
However, “critics complained that good doctors should never panic, so the name was changed to Critical Values,” Lundberg explained.
When any of these critical test values were out of the norm, “we required the responsible laboratory person to quickly verify the result and use the telephone (long before laboratory computers) to personally notify a responsible individual (no messages left) who agreed to find a physician who could quickly act on the result. All was documented with times and names,” he wrote.
“We understand that when a physician wants something, he/she wants it, no matter what. Well, in this patient-focused approach, the physician cannot have it, except as offered by the patient-focused approach, based on TAT [turnaround times of clinical laboratory tests],” wrote George Lundberg, MD (above), President and Chair of the Board of Directors of the Lundberg Institute, and Clinical Professor of Pathology at Northwestern University in an article he penned for the National Medical Journal of India (Photo copyright: Dark Intelligence Group. Shows Dr. Lundberg in 2011 addressing the Executive War College on Diagnostics, Clinical Laboratory, and Pathology Management.)
New Clinical Laboratory Standards
Recognition of the urgency to adopt new hospital standards related to certain clinical laboratory test results came swiftly. In 1972, Lundberg was invited to publish an article explaining the new Critical Value Recognition and Reporting System in Medical Laboratory Observer.
According to Lundberg, “most laboratory tests that are done do not need to be done; the results are either negative, normal, or show no change from a prior result. But some are crucial.”
The original set of Critical Values included the following testing results:
The list of values were later expanded to include “vital values.” These values describe lab results for which “action” is important, but where timing is less urgent. Examples of vital values include:
Lundberg and his colleagues went on to redefine what constitutes a laboratory test and what renders a test successful. They discussed laboratory procedures with committees of clinicians, lab personnel and patients, and reorganized hematology, chemistry, and toxicology based on the turnaround time (TAT) of tests.
“We ‘started the clock’—any and all days/times 24×7—when a specimen arrived at some place within the laboratory, and stopped the clock when a final result was available somewhere in the laboratory,” Lundberg wrote in NMJI. “We categorized all tests as: less than one hour, less than four hours, less than 24 hours, and more than 24 hours, guaranteed, 24×7. As a trade-off, we abolished the concept of ‘STAT’ orders … NO EXCEPTIONS. The rationale of each TAT was the speed with which a result was needed to render proper medical care that mattered to the welfare of the patient, and, of course, that was technically possible.”
Since then, very little has changed for the Critical Values System over the past 50 years. The majority of values added have fallen under the “Vital” category and not the “Critical” category. Today, most health systems and clinical laboratories create their own internal processes and procedures regarding which values need to be reported immediately (critical), which values are not urgent (vital), and how those results should be handled.
Zoomers’ unique approach to work and personal health could affect clinical laboratory workplaces, how staff is managed, and how they personally use lab tests
Would it surprise you to learn that Generation Z is poised to make up 75% of the workforce in the United States by 2025? This fact has many implications for clinical laboratories, genetic testing companies, and pathology practices. That’s because Zoomers, as they are called, will be dominant in two ways. First, they will make up the majority of the lab workforce. Second, they will be the majority of consumers and patients accessing medical laboratory testing services.
Zoomers (born 1997-2012) approach work and their own healthcare differently than previous generations. This is partly due to Zoomers being “digital natives who have little or no memory of the world as it existed before smartphones,” according to Pew Research.
Now, a recently released report by economic research firm Glassdoor on 2024 workplace trends states that Zoomers are about to overtake Baby Boomers (born 1946-1964) in the full-time workforce, and that the shift will “represent a pivotal moment of cultural change that US companies cannot ignore.” This includes clinical laboratories and pathology groups that employ them.
According to Glassdoor, Gen Z workers “care deeply about community connections, about having their voices heard in the workplace, about transparent and responsive leadership, and about diversity and inclusion.”
Zoomers bring unique requirements and attitudes to the workplace, but they may also be the fresh infusion of talent a shrinking healthcare workforce needs. It’s no secret that clinical laboratories and pathology groups are facing a labor shortage. An aging workforce combined with burnout from the COVID-19 pandemic have left the entire healthcare industry scrambling for workers.
“A recent survey by Elsevier Health predicts that up to 75% of healthcare workers will leave the profession by 2025. And a 2020 study conducted by the Association of American Medical Colleges (AAMC) projected a shortfall of up to 139,000 physicians by 2033,” Medscape reported.
In “Clinical Laboratories Suffer During the Great Resignation,” Dark Daily noted other causes that are behind the abundance of open positions, such as early retirements, graduating individuals experiencing more specialized training programs, and a shift in the way the current working generation views employment.
Thus, the current healthcare workplace should not only expect unique challenges as Zoomers take over, but also changes that come with adapting to a smaller, younger workforce.
“[Gen Z] will pressure employers to establish a company’s purpose in a way that contributes to a better society and prioritize a company’s purpose along with profits,” Mark Beal (above), Assistant Professor of Professional Practice and Communication at Rutgers University, told Forbes. “Having succeeded at remote learning, they will influence an increased transition to hybrid and remote work as well as the four-day work week.” Clinical laboratories that understand Zoomers’ motivations will likely have more success integrating them into their workforce. (Photo copyright: Rutgers University.)
However, there could be unique challenges with a Zoomer workforce as well. According to Forbes, more than half of these new workers are willing to leave their jobs over “dissatisfaction with fulfillment (59%), professional development (57%), and providing value (53%).”
Although this may make some older workers scoff, each generation has entered the workforce with its own unique perspective based on personal values, and the workplace has shifted and changed to reflect the new workers. The same can be said of the clinical laboratory and pathology workforces.
The chart above shows the different generations as a proportion of the total population of the United States as of 2025. It dramatically illustrates why the largest number of working age individuals will be from Generation Z (aka, Zoomers). With their unique interests and traits, Zoomers will want their workplaces to be responsive in ways that are much different than the generations that preceded them. This will be equally true of how Gen Z accesses clinical laboratory testing services. (Graphic copyright: The Wall Street Journal.)
Gen Z Likes Automation
Another aspect to the increasing Zoomer workforce is Gen Z’s comfort with automated technology. Automation has always shifted how clinical laboratories work, and it can have great benefits for clinical pathology as well.
According to Today’s Clinical Lab, automation reduces error rates by more than 70% and reduces the time needed for each staff member per specimen by 10%.
However, the benefit does not come from automation replacing workers, rather that automated processes reduce repetitive work that takes time and attention away from workers. And, as noted, Gen Z workers tend to be extremely tech-savvy given the prevalence of technology in their lives.
Automation could fill gaps when it comes to labor shortages, not by replacing workers, but by helping adjust the workflow and avoiding worker burnout by automating tedious tasks. And Gen Z workers may be uniquely suited to engage with automated testing technologies.
Evolving Healthcare Workplaces
“The coming year will … represent a pivotal moment of cultural change that US companies cannot ignore as Gen Z workers—who care deeply about community connections, about having their voices heard in the workplace, about transparent and responsive leadership, and about diversity and inclusion—make up a rapidly growing share of the workforce,” the Glassdoor report stated, adding that 2024 “will test the robustness of workplace institutions,” The Hill reported.
Clinical laboratory managers and pathologists will be managing a multi-generational workforce, each with its own attributes and requirements. Thus, lab managers will need to reflect these difference in the management decisions they make and how they organize the laboratory workplace.
Federal prosecutors allege that this nurse practitioner ordered more genetic tests for Medicare beneficiaries than any other provider during 2020
Cases of Medicare fraud involving clinical laboratory testing continue to be prosecuted by the federal Department of Justice. A jury in Miami recently convicted a nurse practitioner (NP) for her role in a massive Medicare fraud scheme for millions of dollars in medically unnecessary genetic testing and durable medical equipment. She faces 75 years in prison when sentenced in December.
In their indictment, federal prosecutors alleged that from August 2018 through June 2021 Elizabeth Mercedes Hernandez, NP, of Homestead, Florida, worked with more than eight telemedicine and marketing companies to sign “thousands of orders for medically unnecessary orthotic braces and genetic tests, resulting in fraudulent Medicare billings in excess of $200 million,” according to a US Department of Justice (DOJ) news release announcing the conviction.
“Hernandez personally pocketed approximately $1.6 million in the scheme, which she used to purchase expensive cars, jewelry, home renovations, and travel,” the press release noted.
Hernandez was indicted in April 2022 as part of a larger DOJ crackdown on healthcare fraud related to the COVID-19 outbreak.
“Throughout the pandemic, we have seen trusted medical professionals orchestrate and carry out egregious crimes against their patients all for financial gain,” said Assistant Director Luis Quesada (above) of the FBI’s Criminal Investigative Division, in a DOJ press release. Clinical laboratory managers would be wise to monitor these Medicare fraud cases. (Photo copyright: Federal Bureau of Investigation.)
Nurse Practitioner Received Kickbacks and Bribes
Federal prosecutors alleged that the scheme involved telemarketing companies that contacted Medicare beneficiaries and persuaded them to request genetic tests and orthotic braces. Hernandez, they said, then signed pre-filled orders, “attesting that she had examined or treated the patients,” according to the DOJ news release.
In many cases, Hernandez had not even spoken with the patients, prosecutors said. “She then billed Medicare as though she were conducting complex office visits with these patients, and routinely billed more than 24 hours of ‘office visits’ in a single day,” according to the news release.
In total, Hernandez submitted fraudulent claims of approximately $119 million for genetic tests, the indictment stated. “In 2020, Hernandez ordered more cancer genetic (CGx) tests for Medicare beneficiaries than any other provider in the nation, including oncologists and geneticists,” according to the news release.
The indictment noted that because CGx tests do not diagnose cancer, Medicare covers them only “in limited circumstances, such as when a beneficiary had cancer and the beneficiary’s treating physician deemed such testing necessary for the beneficiary’s treatment of that cancer. Medicare did not cover CGx testing for beneficiaries who did not have cancer or lacked symptoms of cancer.”
In exchange for signing the orders, Hernandez received kickbacks and bribes from companies that claimed to be in the telemedicine business, the indictment stated.
“These healthcare fraud abuses erode the integrity and trust patients have with those in the healthcare industry … the FBI, working in coordination with our law enforcement partners, will continue to investigate and pursue those who exploit the integrity of the healthcare industry for profit,” said Assistant Director Luis Quesada of the Federal Bureau of Investigation’s Criminal Investigative Division, in the DOJ press release.
Conspirators Took Advantage of COVID-19 Pandemic
Prosecutors alleged that as part of the scheme, she and her co-conspirators took advantage of temporary amendments to rules involving telehealth services—changes that were enacted by Medicare in response to the COVID-19 pandemic.
The indictment noted that prior to the pandemic, Medicare covered expenses for telehealth services only if the beneficiary “was located in a rural or health professional shortage area,” and “was in a practitioner’s office or a specified medical facility—not at a beneficiary’s home.”
But in response to the pandemic, Medicare relaxed the restrictions to allow coverage “even if the beneficiary was not located in a rural area or a health professional shortage area, and even if the telehealth services were furnished to beneficiaries in their home.”
Hernandez was convicted of:
One count of conspiracy to commit healthcare fraud and wire fraud.
Four counts of healthcare fraud.
Three counts of making false statements.
Medscape noted that she was acquitted of two counts of healthcare fraud. The trial lasted six days, Medscape reported.
Hernandez’s sentencing hearing is scheduled for Dec. 14.
Co-Conspirators Plead Guilty
Two other co-conspirators in the case, Leonel Palatnik and Michael Stein, had previously pleaded guilty and received sentences, the Miami Herald reported.
Palatnik was co-owner of Panda Conservation Group LLC, which operated two genetic testing laboratories in Florida. Prosecutors said that Palatnik paid kickbacks to Stein, owner of 1523 Holdings LLC, “in exchange for his work arranging for telemedicine providers to authorize genetic testing orders for Panda’s laboratories,” according to a DOJ press release. The kickbacks were disguised as payments for information technology (IT) and consulting services.
“1523 Holdings then exploited temporary amendments to telehealth restrictions enacted during the pandemic by offering telehealth providers access to Medicare beneficiaries for whom they could bill consultations,” the press release states. “In exchange, these providers agreed to refer beneficiaries to Panda’s laboratories for expensive and medically unnecessary cancer and cardiovascular genetic testing.”
Palatnik pleaded guilty to his role in the kickback scheme in August 2021 and was sentenced to 82 months in prison, a DOJ press release states.
Stein pleaded guilty in April and was sentenced to five years in prison, the Miami Herald reported. He was also ordered to pay $63.3 million in restitution.
These federal cases involving clinical laboratory genetic testing and other tests and medical equipment indicate a commitment on the DOJ’s part to continue cracking down on healthcare fraud.
Retail giant now has primary care clinics at stores in five states, but the rollout has not gone smoothly
Healthcare is increasingly being driven by consumerism and one clear sign of this trend is Walmart’s ambitious plan to open health clinics at its retail locations. The retail giant set its plans in motion in 2019 with its first primary care site in a suburban Atlanta store, however, the rollout since then has presented certain challenges.
Nevertheless, the trend of placing nearly full-service primary care clinics in retail locations continues. Clinical laboratories in these areas need strategies to serve customers accessing healthcare through these new channels, particularly as Walmart and the national retail pharmacy chains continue to expand the clinical services offered in their retail stores.
“Consumer engagement is a huge part of healthcare, [yet it is also a] gap for us in healthcare,” cardiologist and Walmart VP of Health and Wellness Cheryl Pegus, MD, told Modern Healthcare. “Healthcare is incredibly complicated,” she added. “And where we are in healthcare today is not in having great treatments. It’s not in having evidence-based medicine. It’s understanding how we engage consumers.”
The company also entered the telehealth business with last year’s acquisition of multispecialty telehealth provider MeMD.
“Telehealth offers a great opportunity to expand access and reach consumers where they are and complements our brick-and-mortar Walmart Health locations,” said Pegus in a Walmart new release announcing the acquisition. “Today people expect omnichannel access to care and adding telehealth to our Walmart healthcare strategies allows us to provide in-person and digital care across our multiple assets and solutions.”
Currently, Walmart Health centers only operate in Georgia, Florida, Illinois, and Arkansas. But telehealth enables Walmart “to provide virtual healthcare across the country to anyone,” Pegus said. With both offerings, “we’re really attempting to allow people to get healthcare the way they need it without disrupting the rest of their life.” Many users of these services are Walmart “associates,” she added, using the company’s term for its retail employees.
Large Portfolio of Healthcare Offerings
Pegus joined Walmart (NYSE:WMT) in December 2020 to oversee a portfolio that now includes more than 4,700 pharmacies and 3,400 Vision Centers, in addition to the telehealth operation and the Walmart Health centers. She was previously chief medical officer at Walgreens and Cambia Health Solutions and worked in private practice as a cardiologist.
The retail giant opened its first Walmart Health center in Dallas, Ga., an Atlanta suburb, in September 2019, followed by additional centers in Georgia, Arkansas, and Illinois.
Earlier this year, it opened five new clinics in northern and central Florida with plans for at least four more in the Jacksonville, Orlando, and Tampa areas, according to a press release. Each health center is adjacent to a Walmart retail location.
These centers offer a range of primary care medical services, including:
physicals,
injury care,
immunizations,
radiology, and
care for chronic health conditions.
As Dark Daily reported in May 2020, the Walmart Health centers also offer clinical laboratory testing at cut-rate prices, such as:
$10 for a lipid test,
$10 for Hemoglobin A1c, and
$20 for a strep test.
On the Walmart Health website, patients can enter their Zip code to view a list of Walmart Health clinics in their area, including links to price lists.
Walmart’s Expansion into Healthcare Not Without Problems
However, the company’s expansion into healthcare has not gone smoothly. In 2018, the Walmart board signed off on a plan to open 4,000 health centers by 2029, Insider reported. By the end of 2021, Walmart expected to have 125 health centers in operation, but as of June 2022, the Walmart Health website listed only 25 locations, mostly in Georgia.
Citing anonymous sources, Insider reported problems that include “leadership changes, competing business priorities brought on by the coronavirus pandemic, and the complexity of scaling a massive healthcare operation.”
In Sept. 2021, Insider further reported that the clinics were experiencing operational difficulties including hidden fees and billing problems. One culprit, the story suggested, was the company’s electronic health record (EHR) software. That same month, Walmart announced it would adopt the Epic health records system, beginning with the opening of new clinics in Florida locations.
Pegus’ arrival at Walmart appears to be part of a management shakeup. In January 2022, Insider reported that she had assembled a new executive team, with David Carmouche, MD, Senior VP, Omnichannel Care Offerings, overseeing the health centers and telehealth operations. By then, the original executives leading the rollout of the health centers had all left, Insider reported. Carmouche was previously an executive VP with Ochsner Health in New Orleans.
Partnership with Quest Diagnostics
Meanwhile, in January, Walmart announced a deal with Quest Diagnostics that allows consumers to order more than 50 lab tests through The Wellness Hub on Walmart.com, which is separate from the Walmart Health website. The tests cover “general health, digestive health, allergy, heart health, women’s health, and infectious disease,” according to a press release announcing the partnership.
Consumers can order at-home test kits for certain conditions or set up appointments for tests at Quest Patient Service Centers. The tests on the Walmart/QuestDirect website include:
COVID-19 Active Infection ($119+)
COVID-19 Antibody Test ($69)
Cholesterol Panel ($59)
Complete Blood Count ($59)
Comprehensive Metabolic Panel ($49)
CRP Inflammation Marker ($59)
Diabetes Management ($69+)
Diabetes Risk ($99+)
Food Allergy Test Panel ($209)
Chickenpox ($59)
The website also offers a combined Basic Health Profile with CBC, CMP, cholesterol panel, and urinalysis for $149. “Each purchase is reviewed and, if appropriate, ordered by a licensed physician,” the press release states.
What does all this mean for clinical laboratories? “They need to recognize that the Millennials and Gen Zs are driving a consumer revolution in healthcare,” said Robert Michel, Publisher and Editor-in-Chief of Dark Daily and its sister publication The Dark Report.
“Walmart was early to recognize and respond to this, in part because it employs 1.3 million Americans, many of whom are Gen Y and Gen Z and quick to use telehealth and similar virtual health services,” he added.
Clinical laboratory leaders need to understand this trend and develop strategies to attract and serve new patients who are willing to access healthcare virtually, while still needing to provide blood and other specimens for the lab tests ordered by their providers.
CDC advises clinical laboratories and microbiologists encountering C. auris to follow their own protocols before adopting federal agency guidelines
In July, the Centers for Disease Control and Prevention (CDC) warned healthcare facilities and clinical laboratories to be on the alert for Candida auris (C. auris) infections in their patients. An outbreak of the drug resistant and potentially deadly fungus had appeared in two Dallas hospitals and a Washington D.C. nursing home.
Since those outbreaks, researchers have studied with urgency the “superbug’s” emergence in various types of healthcare facilities around the nation, not just hospitals. Their goal was to discover how it was successfully identified and contained.
“Seeing what was happening in New York, New Jersey, and Illinois [was] pretty alarming for a lot of the health officials in California [who] know that LTACHs are high-risk facilities because they take care of [very] sick people. Some of those people are there for a very long time,” the study’s lead author Ellora Karmarkar, MD, MSc, told Medscape. Karmarkar is an infectious disease fellow with the University of Washington and formerly an epidemic intelligence service officer with the CDC.
“One of the challenges was that people were so focused on COVID that they forgot about the MDROs (multi-drug resistant organisms] … Some of the things that we recommend to help control Candida auris are also excellent practices for every other organism including COVID care,” she added.
According to Medscape, “The OCHD researchers screened LTACH and vSNF patients with composite cultures from the axilla-groin or nasal swabs. Screening was undertaken because 5%–10% of colonized patients later develop invasive infections, and 30%–60% die.
Medscape also reported that the first bloodstream infection was detected in May 2019, and that, according to the Annals of Internal Medicine study, as of January 1, 2020, of 182 patients:
22 (12%) died within 30 days of C. auris identification,
“This is really the first time we’ve seen clustering of resistance in which patients seemed to be getting the infections from each other,” Meghan Lyman, MD, Medical Officer in the Mycotic Diseases Branch of the CDC, told Fox News.
Be More Proactive than Reactive in Identifying C. Auris, CDC Says
C. auris is a type of yeast infection that can enter the bloodstream, spread throughout the body, and cause serious complications. People who appear to have the highest risk of contracting the infection are those:
Who have had a lengthy stay in a healthcare facility,
Individuals connected to a central venous catheter or other medical tubes, such as breathing or feeding tubes, or
Have previously received antibiotics or antifungal medications.
It tends to be resistant to the antifungal drugs that are commonly used to treat Candida infections.
It can be difficult to identify via standard laboratory testing and is easily misidentified in labs without specific technology.
It can quickly lead to outbreaks in healthcare settings.
“With all this spread that we’ve been seeing across the country we’re really encouraging health departments and facilities to be more proactive instead of reactive to identifying Candida auris in general,” Lyman told STAT. “Because we’ve found that controlling the situation and containing spread is really easiest when it’s identified early before there’s widespread transmission.”
Candia Auris versus Other Candida Infections
C. auris can cause dangerous infections in the bloodstream and spread to the central nervous system, kidneys, liver, spleen, bones, muscles, and joints. It spreads mostly in long-term healthcare facilities among patients with other medical conditions.
The symptoms of having a Candida auris infection include:
Fever
Chills
Pain
Redness and swelling
Fluid drainage (if an incision or wound is present)
General feeling of tiredness and malaise
C. auris infections are typically diagnosed via cultures of blood or other bodily fluids, but they are difficult to distinguish from more common types of Candida infections, and special clinical laboratory tests are needed to definitively diagnose C. auris.
Whole-genome Sequencing of C. Auris and Drug Resistance
The CDC conducted whole-genome sequencing of C. auris specimens gathered in Asia, Africa, and South America and discovered four different strains of the potentially life-threatening Candida species. All four detected strains have been found in the United States.
There are only three classes of antifungal drugs used to treat Candida auris infections:
However, 85% of the infections in the US have proven to be resistant to azoles and 38% are resistant to polyenes. Patients respond well to echinocandins, but more effective therapies are needed especially as some isolates may become resistant while a patient is on drug therapy, STAT reported.
“Even while it might be susceptible upfront, after a week or two of therapy, we may find that the patient has an infection now caused by an isolate of the same Candida auris that has become resistant to the echinocandins and we are really left with nothing else,” Jeffrey Rybak, PhD, PharmD, Instructor, Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, told Infection Control Today.
Although relatively rare, C. auris infections are on the rise. The good news is that there may be further pharmaceutical help available soon. New antifungal agents, such as Ibrexafungerp (Brexafemme) show promise in fighting C. auris infections, but more research is needed to prove their efficacy.
What Should Clinical Laboratories Do?
The CDC stresses that clinical laboratories and microbiologists working with known or suspected cases of Candida auris should first adhere to their own safety procedures. The CDC issued guidelines, but they are not meant to supersede the policies of individual labs.
The CDC also recommends that healthcare facilities and clinical laboratories that suspect they have a patient with a Candida auris infection immediately contact the CDC and state or local public health authorities for guidance.