M65.1
Other infective (teno)synovitis
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 13 never code together
M65code
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Alongside this code 6 same parent — M65
Subordinate codes 10
M65.10 Other infective (teno)synovitis, unspecified site M65.11 Other infective (teno)synovitis, shoulder M65.12 Other infective (teno)synovitis, elbow M65.13 Other infective (teno)synovitis, wrist M65.14 Other infective (teno)synovitis, hand M65.15 Other infective (teno)synovitis, hip M65.16 Other infective (teno)synovitis, knee M65.17 Other infective (teno)synovitis, ankle and foot M65.18 Other infective (teno)synovitis, other site M65.19 Other infective (teno)synovitis, multiple sites
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.