By Allison Evans, assistant managing editor
An elderly patient sees a dermatologist and is diagnosed with pityriasis rubra pilaris (PRP). After the patient fails a number of oral medications and is unresponsive to topical agents and systemic steroids, the dermatologist prescribes adalimumab. Unfortunately, the patient, who is insured through Medicare Part D, is denied coverage because adalimumab was not prescribed for a “medically accepted indication.”
Dirk Elston, MD, past Academy president and current editor of JAAD, and his colleagues experienced this situation first-hand. Unlike dealing with private insurers, in which a physician can get prior approval for the off-label use of drugs, based on clinical argumentation or peer-reviewed literature, coverage determinations for Medicare Part D are limited by two compendia approved by the Centers for Medicare and Medicaid Services (CMS).
This month, Dermatology World explores how the Medicare Part D program’s reliance on two hard-to-access and often outdated compendia to determine coverage for off-label drug use can leave a subsection of Medicare Part D beneficiaries without adequate drug coverage.
What are the compendia?
The official compendia used by Medicare Part D to make off-label coverage determinations are Micromedex Drugdex and the American Hospital Formulary Service (AHFS) Drug Information. These are comprehensive listings of drugs and biologics that include a summary of the dosing and characteristics of the drug and recommended uses for specific diseases.
Many physicians are not even aware of the compendia until they receive a denial letter, said John Barbieri, MD, MBA, a dermatology research fellow at the University of Pennsylvania and lead author of a 2019 JAMA Dermatology article that evaluates the compendia and Medicare Part D coverage determinations for off-label prescribing in dermatology (https://doi.10.1001/jamadermatol.2018.5052).
How does Medicare use the compendia?
When CMS developed the Medicare Part D program, coverage was a serious concern, said Joerg Albrecht, MD, PhD, a Chicago-based dermatologist and chair of the AADA’s Drug Pricing and Transparency Task Force. “CMS has used the compendia to ensure uniform and generally generous coverage between carriers.”
When can Medicare Part D deny coverage of a treatment?
Under Medicare Part D, a drug must be prescribed for a medically accepted indication, which is defined by CMS as:
• a use that is approved by the FDA, or
• a use that is supported by one or more citations in at least one of two CMS-approved compendia
Under Medicare Part D, a drug must be prescribed for a medically accepted indication, which is defined by CMS as a use that is approved by the Food and Drug Administration (FDA) or a use that is supported by one or more citations in at least one of the two CMS-approved compendia. Non-FDA-approved drugs that are prescribed outside the compendia’s guidelines have to be denied without exception.
According to Dr. Barbieri and his colleagues who authored the JAMA Dermatology study, “while the formularies may be designed with the best of intentions, incomplete or inadequate formulary construction could prevent patients from having access to necessary, evidence-based treatments, leading to worse outcomes for patients.”
Off-label prescribing
For Medicare Part D, if a medication is not FDA-approved to treat an indication, the off-label use of the drug is dictated by Medicare’s approved compendia. About 20% of all prescriptions written in the United States are for off-label therapies — and the practice is more common for patient populations like children and the elderly. Between 17% and 73% of prescriptions for the 10 most common dermatologic diseases are outside their labeled indications (https://doi.org/10.1016/j.jaad.2018.09.016).
With many prescriptions written for off-label indications, especially for rare conditions, it is important that elderly patients have access to treatments that face little to no possibility of garnering FDA approval. Many dermatologic conditions are so rare that they lack unique international classification of disease codes. According to a 2018 commentary in JAAD, the ICD-10 “does not include erosive pustulosis of the scalp or actinic prurigo, but multiple codes exist for attacks by turkeys and macaws” (https://doi.org/10.1016/j.jaad.2018.09.016).
Prior authorization appeal tool
Quickly and easily create a customized prior authorization appeal letter by using the AADA’s letter-generator tool at staging.aad.org/member/practice/drugs/pa-tool.
Evaluating the compendia
To assess the magnitude of the problem, Dr. Barbieri and his colleagues evaluated a list of 238 accepted treatments for 22 chronic, noninfectious, nonneoplastic dermatologic conditions that had at least four systemic therapies, including one considered first-line, but many not approved by the FDA. Only 73 treatments (30.7%) were listed in either compendium. There were frequent inconsistencies between the compendia with 53 (22.3%) medications evaluated included in one compendium but not the other. Additionally, the literature used was often based on decades-old sources, with some citations published before the 1980s.
“We were alarmed that over two-thirds of the medications evaluated were not included in the compendia, including half of the medications with the highest evidence grade (double-blind clinical trial),” Dr. Barbieri said. “In addition, these compendia disagreed with each other almost a quarter of the time, which suggests that the approach used to develop them is both incomplete and inconsistent.”
Neither compendium had any treatments listed for autoimmune progesterone dermatitis, eosinophilic fasciitis, lichen myxedematosus, linear IgA bullous dermatosis, or folliculitis decalvans, according to the study authors. “Many of these diseases are rare, but real,” Dr. Barbieri added.
Oncologists once struggled with similar denial issues since many of their treatments are off-label and require prior authorizations, but they worked with CMS to get approval for compendia specifically for cancer treatments. Dermatology, however, is more unusual in the types of diseases treated and the methods by which they are treated, so it’s not as simple as adding a dermatology-specific compendium, Dr. Albrecht explained. “We have very few physicians and a lot of diseases — a number of which are rare diseases. The rarer the diseases, the less likely you are going to have standardized approaches.”