M15.9 – Polyosteoarthritis, unspecified

ICD-10-CM 2027 diagnosis code · Osteoarthritis

Billable code

ICD-10-CM code M15.9

Code: M15.9 (claims format: M159)
Description: Polyosteoarthritis, unspecified
Billable: Yes – valid for HIPAA-covered transactions
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: M15

Notes for M15.9

Applicable to:

Generalized osteoarthritis NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M15 – Polyosteoarthritis

Includes:

arthritis of multiple sites

Excludes1 (not coded here):

bilateral involvement of single joint (M16-M19)

Block M15-M19

Excludes2 (not included here):

osteoarthritis of spine (M47.-)

Index terms for M15.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in M15

M15.0 – Primary generalized (osteo)arthritisBillable
M15.1 – Heberden's nodes (with arthropathy)Billable
M15.2 – Bouchard's nodes (with arthropathy)Billable
M15.3 – Secondary multiple arthritisBillable
M15.4 – Erosive (osteo)arthritisBillable
M15.8 – Other polyosteoarthritisBillable

Frequently asked questions

What is ICD-10 code M15.9?

M15.9 is the ICD-10-CM code for polyosteoarthritis, unspecified, in the block M15-M19 (Osteoarthritis).

Is M15.9 a billable code?

Yes. M15.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M15.9 belong to?

It belongs to category M15 – Polyosteoarthritis.

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.