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Living Legend William Dettwyler, MT, Looks Back at Seven Decades in the Clinical Laboratory Profession

Dettwyler is set to retire at age 92 after a long career helping clinical laboratories with their coding and billing systems

When William Dettwyler, MT, began working in a clinical laboratory, Harry Truman was president of the United States and scientists had not yet discovered the structure of DNA. Now, as he approaches his 92nd birthday in March, he is finally ready to retire from a career that has spanned more than seven decades, from bench work as a medical laboratory technician (MLT) to assisting labs with their medical coding and medical billing challenges.

Along the way, one of his coding innovations helped the State of Oregon save substantial sums in its Medicaid program. He also helped many medical laboratories increase reimbursement by correcting their coding mistakes. This from someone who left school after eighth grade to help on his family’s farm in rural Oregon.

In an exclusive interview with Dark Daily, Dettwyler discusses his long career and offered pointers for labs on improving their coding and reimbursement procedures.

Back in the 1980s, when he began his consulting work for labs, “they were very poor at billing,” he recalled. “Hospital billing staff didn’t understand lab coding. Reference laboratories didn’t do a good job of picking the right codes or even billing all the codes. Up until around the 1970s, hospitals didn’t even have to bill individual lab procedures with CPT codes. They billed with a revenue center code for all their lab services.”

These days “people are much more sophisticated,” he notes. “There are fewer coding problems compared to what it was in the 1980s and 1990s up to the 2010s.” However, he says he still has a handful of clients who call on his expertise.

“It was not unusual to go to a large university medical center and in three days tell the CFO on my exit review that the following year their lab would bring in about a half million more in revenue, just from my coding review. But I did not reveal to them that I had only gone to the eighth grade in a little one room school and was the lone graduate in my eighth-grade class,” wrote William Dettwyler, MT (above), owner of Codus Medicus in Salem, Ore., in an article he penned for Medical Laboratory Observer. For 75 years Dettwyler worked in the clinical laboratory industry. For much of that time he helped labs all over America improve their coding and reimbursement systems. (Photo copyright: LinkedIn.)

How It All Began

Dettwyler got his first taste of lab work in the early 1950s as a teenager washing glassware for a medical laboratory technician at a local medical practice. A few years later he completed an MLT program at Oregon Institute of Technology in Klamath Falls and landed his first lab tech job at a clinic in Portland.

His entry to consulting came in the early 1970s while he was working for a medical group in Salem. “I was helping the accounting personnel with their billing and noticed that Medicaid was not paying for a common test for syphilis that I was performing,” he recalled. “I contacted Medicaid, and they told me they didn’t understand laboratory procedures.”

After that, “they started to call me frequently with laboratory questions,” he said. “It wasn’t long before they asked me to help them on a part-time basis.” He also assisted with questions related to radiology.

By 1976, Dettwyler was devoting 35 hours a week to assisting the state Medicaid agency while still working as a lab tech.

Simple Hack Ends Overpayments

One of his career highlights came around 1981, when he discovered that the agency was overpaying for some pathology and radiology procedures by as much as 200%.

“Pathologists and radiologists are paid based on whether they are performing the complete procedure—the technical component and the professional component—or just the professional component, where they interpret the results,” he explained.

When billing for just the professional component, the physicians would add two digits to the standard code, so it might come in as 88305-26. However, the state’s computer system could only accommodate a five-digit code, so the state was paying as if the providers had done everything.

“The computer techs said the software couldn’t handle a seven-digit number in a five-digit box, so I devised a way for the computer to read the equivalent of seven digits,” he recalled.

His solution was to modify the codes so that the last digit was an alphabetic character. Instead of billing for code 88305-26, the physicians would bill for 8830F, and the state would pay them correctly.

Around that time, Dettwyler also began assisting a Medicare office in Portland. This forced him to cut back on his work as a lab tech. But he still worked around 60 hours a week.

“For most of my life, I’ve worked three jobs,” he said. “Work is my hobby.” He also had a large family to support—by 1976, he and his wife had 10 kids.

Transition to Lab Consulting

In 1986, the state was facing a budget shortfall and cut its Medicaid consultants, so Dettwyler decided to seek consulting work with labs while continuing to work at the bench.

“I really liked the coding because I had very little competition,” he said. “But I wanted to keep working in the laboratory mainly to understand the problems.”

While working for the state, Dettwyler attended coding seminars and workshops. He noticed that labs were losing revenue due to poor billing practices. “They didn’t understand all the coding complexities, so they really hungered for this kind of assistance.”

But first, he had to find clients. So he partnered with another lab tech who was offering similar consulting services.

Business picked up after Dettwyler contributed an article to the trade publication Medical Laboratory Observer about his process, which he calls “procedure code verification and post payment analysis.”

“That went like gangbusters,” he said. “We started getting calls from all over the country.”

Dettwyler later split from his partner and went to work on his own.

“I would sit down with the person who was responsible for coding, usually the lab or radiology manager,” he explained. “We would go over the chargemaster and cover every procedure to make sure the code and units were correct. When I was done, I would give them a report of what codes we changed and why we changed them.”

Beginning in 1989, he signed on as a contractor for another consultancy, Health Systems Concepts on the East Coast, where he remained until 2019.

Advice to the Current Generation

What is Dettwyler’s advice for someone who wants to follow in his footsteps and assist labs with their coding? “I wouldn’t recommend it now,” he said. “There’s less need for that kind of assistance than in the past.”

However, he does find that labs still run into problems. The greatest need, he says, is in molecular diagnostics, due to the complexity of the procedures.

In addition, labs are sometimes confused by coding for therapeutic drug monitoring, in which a doctor is gauging a patient’s reaction to a therapy versus screening for substance abuse. “Those issues are often misunderstood,” he said.

Microbiology also poses coding challenges, he noted, because of the steps required to identify the pathogen and determine antibiotic susceptibility. “It requires quite a bit of additional coding,” he said. “Some labs don’t understand that they can’t just bill a code for culture and sensitivity. They have to bill for the individual portions.”

Labs that work with reference labs also have to be careful to verify codes for specific procedures. “I’ll review the codes used by reference labs and, surprisingly, they’re not always correct. Reference labs sometimes get it wrong.”

If someone does want to become a coding expert, Dettwyler suggests that “they should first have experience as a lab tech, especially in microbiology, because of the additional coding. And they should try to work with somebody who is already doing it. Then, they should work with the billing department to learn how it operates.”

He also advises clinical laboratory managers to follow the latest developments in the field by reading lab publications such as The Dark Report. “You have to do that to keep current,” he said.

Despite never completing high school, Dettwyler eventually received his GED and an associate degree. “But the degrees didn’t really help me,” he said. “Much of it was on-the-job training and keeping my eyes open and listening.”                     

Stephen Beale

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