M65.85 – Other synovitis and tenosynovitis, thigh
ICD-10-CM 2027 diagnosis code · Disorders of synovium and tendon
- Code
M65.85(claims format:M6585)- Description
- Other synovitis and tenosynovitis, thigh
- 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
- M65-M67 Disorders of synovium and tendon
- Parent codes
- M65 › M65.8
Billable codes under M65.85
M65.85 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.
M65 – Synovitis and tenosynovitis
Index terms for M65.85
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M65.8
- M65.80 – Other synovitis and tenosynovitis, unspecified siteBillable
- M65.81 – Other synovitis and tenosynovitis, shoulderHeader
- M65.82 – Other synovitis and tenosynovitis, upper armHeader
- M65.83 – Other synovitis and tenosynovitis, forearmHeader
- M65.84 – Other synovitis and tenosynovitis, handHeader
- M65.86 – Other synovitis and tenosynovitis, lower legHeader
- M65.87 – Other synovitis and tenosynovitis, ankle and footHeader
- M65.88 – Other synovitis and tenosynovitis, other siteBillable
- M65.89 – Other synovitis and tenosynovitis, multiple sitesBillable
Frequently asked questions
What is ICD-10 code M65.85?
M65.85 is the ICD-10-CM code for other synovitis and tenosynovitis, thigh, in the block M65-M67 (Disorders of synovium and tendon).
Is M65.85 a billable code?
No. M65.85 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M65.85 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.