M12.3 – Palindromic rheumatism
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
ICD-10-CM code
M12.3
- Code
M12.3(claims format:M123)- Description
- Palindromic rheumatism
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M05-M14 Inflammatory polyarthropathies
- Parent codes
- M12
Billable codes under M12.3
M12.3 is a header code and cannot be used on claims. Choose the most specific code:
- M12.30 – Palindromic rheumatism, unspecified siteBillable
- M12.31 – Palindromic rheumatism, shoulderHeader (more codes below)
- M12.32 – Palindromic rheumatism, elbowHeader (more codes below)
- M12.33 – Palindromic rheumatism, wristHeader (more codes below)
- M12.34 – Palindromic rheumatism, handHeader (more codes below)
- M12.35 – Palindromic rheumatism, hipHeader (more codes below)
- M12.36 – Palindromic rheumatism, kneeHeader (more codes below)
- M12.37 – Palindromic rheumatism, ankle and footHeader (more codes below)
- M12.38 – Palindromic rheumatism, other specified siteBillable
- M12.39 – Palindromic rheumatism, multiple sitesBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M12 – Other and unspecified arthropathy
Related codes in M12
- M12.0 – Chronic postrheumatic arthropathy [Jaccoud]Header
- M12.1 – Kaschin-Beck diseaseHeader
- M12.2 – Villonodular synovitis (pigmented)Header
- M12.4 – Intermittent hydrarthrosisHeader
- M12.5 – Traumatic arthropathyHeader
- M12.8 – Other specific arthropathies, not elsewhere classifiedHeader
- M12.9 – Arthropathy, unspecifiedBillable
Frequently asked questions
What is ICD-10 code M12.3?
M12.3 is the ICD-10-CM code for palindromic rheumatism, in the block M05-M14 (Inflammatory polyarthropathies).
Is M12.3 a billable code?
No. M12.3 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M12.3 belong to?
It belongs to category M12 – Other and unspecified arthropathy.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.