M06.1: Adult-onset Still's disease
M06.1 is a billable, specific ICD-10-CM code for adult-onset still's disease. It is valid for submission on a claim.
Check M06.1 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- Still's disease NOS (M08.2-)
Other codes that can never be billed with M06.1
Their own Excludes1 notes name this code, so the conflict is not listed above.
- M08.2Juvenile rheumatoid arthritis with systemic onset
Risk adjustment
M06.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 93 Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders0.617 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
M06.1 is named in 27 Medicare coverage policies: 20 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.
- A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
- A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
Alphabetic index entries that lead here
- Still's disease or syndrome›adult-onset
Code history
Unchanged in every release from FY2024 to FY2027.