M65.879 – Other synovitis and tenosynovitis, unspecified ankle and foot

ICD-10-CM 2027 diagnosis code · Disorders of synovium and tendon

Billable code

ICD-10-CM code M65.879
Code
M65.879 (claims format: M65879)
Description
Other synovitis and tenosynovitis, unspecified ankle and foot
Short description
Other synovitis and tenosynovitis, unsp ankle and foot
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
M65-M67 Disorders of synovium and tendon
Parent codes
M65 › M65.8 › M65.87

Notes inherited from parent codes

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

M65 – Synovitis and tenosynovitis

Excludes1 (not coded here):
  • chronic crepitant synovitis of hand and wrist (M70.0-)
  • current injury - see injury of ligament or tendon by body region
  • soft tissue disorders related to use, overuse and pressure (M70.-)

Related codes in M65.87

Frequently asked questions

What is ICD-10 code M65.879?

M65.879 is the ICD-10-CM code for other synovitis and tenosynovitis, unspecified ankle and foot, in the block M65-M67 (Disorders of synovium and tendon).

Is M65.879 a billable code?

Yes. M65.879 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M65.879 belong to?

It belongs to category M65 – Synovitis and tenosynovitis.

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.