Is M05.779 a billable code?
Yes. M05.779 is a billable ICD-10-CM code and can be used on claims and superbills for dates of service from October 1, 2026 to September 30, 2027.
ICD-10-CM FY2027 diagnosis code
M05.779: Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement
Billable codeValid for dates of service October 1, 2026 to September 30, 2027
M05.779 is a billable ICD-10-CM diagnosis code for rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement. It is specific enough to use on an insurance claim, a superbill or a Good Faith Estimate.
Superbill GeneratorStart a superbill with M05.779 already added.Good Faith EstimateStart a cost estimate with M05.779 already added.CMS-1500 Claim FormFill a claim form with M05.779 in box 21.
Other codes in M05.77 Rheumatoid arthritis with rheumatoid factor of ankle and foot without organ or systems involvement
M05.779 questions
What does M05.779 mean?
M05.779 is the ICD-10-CM code for Rheumatoid arthritis with rheumatoid factor of unspecified ankle and foot without organ or systems involvement. It is in chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.