M19.21 – Secondary osteoarthritis, shoulder
ICD-10-CM 2027 diagnosis code · Osteoarthritis
ICD-10-CM code
M19.21
- Code
M19.21(claims format:M1921)- Description
- Secondary osteoarthritis, shoulder
- 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
- Parent codes
- M19 › M19.2
Billable codes under M19.21
M19.21 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M19 – Other and unspecified osteoarthritis
Excludes1 (not coded here):
- polyarthritis (M15.-)
Excludes2 (not included here):
Block M15-M19
Excludes2 (not included here):
- osteoarthritis of spine (M47.-)
Index terms for M19.21
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M19.2
Frequently asked questions
What is ICD-10 code M19.21?
M19.21 is the ICD-10-CM code for secondary osteoarthritis, shoulder, in the block M15-M19 (Osteoarthritis).
Is M19.21 a billable code?
No. M19.21 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M19.21 belong to?
It belongs to category M19 – Other and unspecified osteoarthritis.
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.