M65 — Synovitis and tenosynovitis
Not billable
Is M65 billable?
No — M65 is a non-billable header code. M65 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath M65.
Billable codes under this header
- M65.4Radial styloid tenosynovitis [de Quervain]
- M65.00Abscess of tendon sheath, unspecified site
- M65.08Abscess of tendon sheath, other site
- M65.10Other infective (teno)synovitis, unspecified site
- M65.18Other infective (teno)synovitis, other site
- M65.19Other infective (teno)synovitis, multiple sites
- M65.20Calcific tendinitis, unspecified site
- M65.28Calcific tendinitis, other site
- M65.29Calcific tendinitis, multiple sites
- M65.30Trigger finger, unspecified finger
- M65.80Other synovitis and tenosynovitis, unspecified site
- M65.88Other synovitis and tenosynovitis, other site
- M65.89Other synovitis and tenosynovitis, multiple sites
- M65.90Unspecified synovitis and tenosynovitis, unspecified site
- M65.98Unspecified synovitis and tenosynovitis, other site
- M65.99Unspecified synovitis and tenosynovitis, multiple sites
- M65.011Abscess of tendon sheath, right shoulder
- M65.012Abscess of tendon sheath, left shoulder
- M65.019Abscess of tendon sheath, unspecified shoulder
- M65.021Abscess of tendon sheath, right upper arm
- M65.022Abscess of tendon sheath, left upper arm
- M65.029Abscess of tendon sheath, unspecified upper arm
- M65.031Abscess of tendon sheath, right forearm
- M65.032Abscess of tendon sheath, left forearm
- M65.039Abscess of tendon sheath, unspecified forearm
- M65.041Abscess of tendon sheath, right hand
- M65.042Abscess of tendon sheath, left hand
- M65.049Abscess of tendon sheath, unspecified hand
- M65.051Abscess of tendon sheath, right thigh
- M65.052Abscess of tendon sheath, left thigh
- M65.059Abscess of tendon sheath, unspecified thigh
- M65.061Abscess of tendon sheath, right lower leg
- M65.062Abscess of tendon sheath, left lower leg
- M65.069Abscess of tendon sheath, unspecified lower leg
- M65.071Abscess of tendon sheath, right ankle and foot
- M65.072Abscess of tendon sheath, left ankle and foot
- M65.079Abscess of tendon sheath, unspecified ankle and foot
- M65.111Other infective (teno)synovitis, right shoulder
- M65.112Other infective (teno)synovitis, left shoulder
- M65.119Other infective (teno)synovitis, unspecified shoulder
- M65.121Other infective (teno)synovitis, right elbow
- M65.122Other infective (teno)synovitis, left elbow
- M65.129Other infective (teno)synovitis, unspecified elbow
- M65.131Other infective (teno)synovitis, right wrist
- M65.132Other infective (teno)synovitis, left wrist
- M65.139Other infective (teno)synovitis, unspecified wrist
- M65.141Other infective (teno)synovitis, right hand
- M65.142Other infective (teno)synovitis, left hand
- M65.149Other infective (teno)synovitis, unspecified hand
- M65.151Other infective (teno)synovitis, right hip
- M65.152Other infective (teno)synovitis, left hip
- M65.159Other infective (teno)synovitis, unspecified hip
- M65.161Other infective (teno)synovitis, right knee
- M65.162Other infective (teno)synovitis, left knee
- M65.169Other infective (teno)synovitis, unspecified knee
- M65.171Other infective (teno)synovitis, right ankle and foot
- M65.172Other infective (teno)synovitis, left ankle and foot
- M65.179Other infective (teno)synovitis, unspecified ankle and foot
- M65.221Calcific tendinitis, right upper arm
- M65.222Calcific tendinitis, left upper arm
M65 at a glance
| Code | M65 |
|---|---|
| Description | Synovitis and tenosynovitis |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with M65 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M65, but a patient may have both at the same time. When documentation supports it, M65 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under M65? (7)
- M65.0Abscess of tendon sheathnot billable
- M65.1Other infective (teno)synovitisnot billable
- M65.2Calcific tendinitisnot billable
- M65.3Trigger fingernot billable
- M65.4Radial styloid tenosynovitis [de Quervain]
- M65.8Other synovitis and tenosynovitisnot billable
- M65.9Synovitis and tenosynovitis, unspecifiednot billable
How long has M65 existed?
M65 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.