Physicians with advanced training in clinical nutrition now have their own Medicare specialty designation. The Centers for Medicare & Medicaid Services (CMS) established a Physician Nutrition Specialist specialty code, F7, effective for dates of service on or after Oct. 1, according to a CMS change request issued May 27. The code went live in Medicare systems Oct. 5.
The code is potentially relevant to gastroenterologists and hepatologists with advanced nutrition expertise. The change request directs Medicare contractors to recognize F7 as either a primary or a secondary specialty code.
“In a way, really, GI is nutrition,” said Michael M. Rothkopf, MD, FACP, FASN, NBPNS, a board member and former president of the National Board of Physician Nutrition Specialists (NBPNS), who handled the board’s applications for the code.
NBPNS requested the code with support from the American Society for Nutrition, according to an NBPNS announcement. The code identifies physician nutrition specialists in Medicare enrollment and claims systems, but it does not create a new Medicare benefit or guarantee payment for specific services, the announcement noted.
Rothkopf called the code “a historic breakthrough in U.S. healthcare,” adding “For the first time, we have structural recognition of doctors who are experts in nutrition.”
What the code changes
Physicians self-designate their specialty when they enroll in Medicare, and CMS uses specialty codes for programmatic and claims-processing purposes, according to the change request. CMS is still implementing F7 and has not yet detailed how it will be applied in practice, Rothkopf said. NBPNS defines physician nutrition specialists as physicians who have met the board’s requirements and are certified by it.
Medicare’s claims systems now also recognize five physician nutrition specialist taxonomy codes, one each under internal medicine, family medicine, pediatrics, surgery, and anesthesiology. Because gastroenterologists first train in internal medicine, Rothkopf noted, they could use the internal medicine code.
Before F7, Rothkopf said, he billed Medicare simply as an internist, while the gastroenterologists, nephrologists, hospitalists, and hematologists on the same patient’s chart — also internists — each billed under their own specialty.
“Now I could bill with code F7, which clearly shows that I’m somebody different than all the other internists on the chart,” he said. “It removes this billing ambiguity.”
“That kind of ambiguity is part of why insurance algorithms frequently flag or reject claims for specialized nutrition counseling,” Rothkopf said.
He expects the specialty to eventually appear in electronic medical record systems and in hospital privileging decisions. “It’s too new to see quick changes, but it should eventually filter down,” he said.
Rothkopf also sees the code as a fix for what he calls “outcome blindness.” For decades, he said, nutrition specialists have argued that preventing malnutrition in the hospital and using nutrition alongside other treatments can improve patients’ outcomes.
“We couldn’t prove it because there was no way to segregate and show the impact of a physician nutrition specialist, because there was no way to identify us in the record,” he said. “But now there is because of the F7 code.”
Where GI fits
“Nutrition is in the middle of patient care,” Rothkopf said. “You can’t take care of a human being without addressing their nutritional needs.”
He pointed to examples such as knowing deciding what to give a patient through a percutaneous endoscopic gastrostomy tube, or a gluten-free diet for a patient with celiac disease. “GI doctors are doing this every day,” he said. Looking ahead, he added, “I really see the day where practically every GI specialist will want to have some credentials in medical nutrition.”
He sees the code as especially meaningful for early-career physicians. “Early-career physicians in particular who might be passionate about this, just like I was. They now can see a recognized, viable subspecialty path that doesn’t take them out of mainstream medicine,” he said.
Getting certified
NBPNS certification is a separate, voluntary process. Under the board’s candidate handbook, applicants need a current medical license and primary specialty board certification, and they must demonstrate nutrition expertise by meeting at least two of seven criteria. This can include mentored clinical nutrition training, service on a hospital nutrition support team, or at least 75 hours of continuing medical education (CME) in clinical nutrition. The exam is offered on a rolling basis with remote proctoring. Certification lasts 10 years and can be renewed by retaking the exam or through nutrition-related CME.
Rothkopf said the certification process is “not that hard,” and that many GI physicians already have relevant training. “Some of the younger generation actually do a year of nutrition as part of their fellowship,” he said.
Until CMS updates its enrollment forms and the PECOS online system, physicians enrolling in Medicare as physician nutrition specialists can select “Undefined Physician Type” on the CMS-855I or CMS-855O and specify Physician Nutrition Specialist, according to the change request. F7 enrollments cannot take effect before Oct. 1.
Three years, three agencies
Rothkopf said physician nutrition specialists were “tired of being invisible” and “in an administrative ghost town” without formal recognition for their specialty. He attributed that in part to “a structural bias against nutrition,” saying “the has favored pharmaceutical, surgical and procedural activities that are more easily definable.”
“So, we set out to try to change that, to create a structure where organized medicine would have to pay attention to this, and that’s what we’ve accomplished,” Rothkopf said. “It took us about three years to do it.”
The first stop was the National Uniform Claim Committee (NUCC), which maintains the taxonomy codes that identify physicians and other healthcare professionals by specialty. No code existed for physician nutrition specialists. “Why not? Well, because nobody asked for it,” Rothkopf said.
The NUCC initially rejected NBPNS’s application, and the board won approval on its first appeal, he said. The resulting taxonomy codes took effect in 2025. Next came CAQH, whose credentialing database insurers use to verify physicians’ training, licenses, and board certifications. Its portal had no specialty option for physician nutrition specialists until NBPNS applied; one appeared a few months later, Rothkopf said.
Then came what he called “the big one”: CMS, which also initially rejected the request. After an appeal and a few rounds back and forth, NBPNS learned a few months ago that the code had been approved, he said.
Rothkopf, who said he has been interested in nutrition since he was a third-year medical student, said earlier efforts to win this kind of recognition fell short because “the timing was just not right.” This time, he pointed to demand from patients and to the evidence. “The science of nutrition has evolved enough that its value is clear, without any doubt or equivocation,” he said.
What’s next
Rothkopf said he is already in touch with the Joint Commission on making them aware of the new code and the need for qualified nutritional specialists to take care of patients. In hospitals, he said, people writing parenteral nutrition orders or recommending specific diets for patients “need to be certified.”
“With in the hospital, we don’t let an unqualified person do an endoscopy ... You can’t just walk into the OR and do surgery. You have to show that you belong there,” Rothkopf said. “And so, the same thing should be true for the nutritional therapies.”
Rothkopf called the change “a fundamental shift in how medicine is going to be practiced in the future.”
“I think that in decades to come, it will be thought of as absurd that doctors took care of patients without addressing their nutritional requirements and without thinking about how nutrition impacted either the cause of their illness or assisted in their recovery,” he said. “I think it will be looked at as just unthinkable to practice medicine without it in the future.”