M19 – Other and unspecified osteoarthritis
ICD-10-CM 2027 diagnosis code · Osteoarthritis
ICD-10-CM code
M19
- Code
M19(claims format:M19)- Description
- Other and unspecified osteoarthritis
- 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
- M15-M19 Osteoarthritis
Billable codes under M19
M19 is a header code and cannot be used on claims. Choose the most specific code:
- M19.0 – Primary osteoarthritis of other jointsHeader (more codes below)
- M19.1 – Post-traumatic osteoarthritis of other jointsHeader (more codes below)
- M19.2 – Secondary osteoarthritis of other jointsHeader (more codes below)
- M19.9 – Osteoarthritis, unspecified siteHeader (more codes below)
Notes for M19
Excludes1 (not coded here):
- polyarthritis (M15.-)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block M15-M19
Excludes2 (not included here):
- osteoarthritis of spine (M47.-)
Frequently asked questions
What is ICD-10 code M19?
M19 is the ICD-10-CM code for other and unspecified osteoarthritis, in the block M15-M19 (Osteoarthritis).
Is M19 a billable code?
No. M19 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.