ICD-10-CM 2027 diagnosis code

M11Other crystal arthropathies

Not billable — use a more specific code

M11 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M11

M11 is the ICD-10-CM diagnosis code for other crystal arthropathies. It belongs to block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: M11.0 (disease), M11.1 (chondrocalcinosis), M11.2 (chondrocalcinosis), M11.8 (arthropathies) and M11.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under M11

Notes that apply from higher levels

Instructions written at a parent level also apply to M11.

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Code history

2016
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2021
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2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about M11

Is M11 billable?: No. M11 is a header code. Report one of its more specific subcodes instead.