M11 – Other crystal arthropathies
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
ICD-10-CM code
M11
- Code
M11(claims format:M11)- Description
- Other crystal arthropathies
- 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
Billable codes under M11
M11 is a header code and cannot be used on claims. Choose the most specific code:
- M11.0 – Hydroxyapatite deposition diseaseHeader (more codes below)
- M11.1 – Familial chondrocalcinosisHeader (more codes below)
- M11.2 – Other chondrocalcinosisHeader (more codes below)
- M11.8 – Other specified crystal arthropathiesHeader (more codes below)
- M11.9 – Crystal arthropathy, unspecifiedBillable
Frequently asked questions
What is ICD-10 code M11?
M11 is the ICD-10-CM code for other crystal arthropathies, in the block M05-M14 (Inflammatory polyarthropathies).
Is M11 a billable code?
No. M11 is a header code with more specific child codes; report one of the billable codes listed above.
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.