M66.1 — Rupture of synovium
Is M66.1 billable?
No — M66.1 is a non-billable header code. M66.1 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 29 billable codes beneath M66.1.
Billable codes under this header
- M66.10Rupture of synovium, unspecified joint
- M66.18Rupture of synovium, other site
- M66.111Rupture of synovium, right shoulder
- M66.112Rupture of synovium, left shoulder
- M66.119Rupture of synovium, unspecified shoulder
- M66.121Rupture of synovium, right elbow
- M66.122Rupture of synovium, left elbow
- M66.129Rupture of synovium, unspecified elbow
- M66.131Rupture of synovium, right wrist
- M66.132Rupture of synovium, left wrist
- M66.139Rupture of synovium, unspecified wrist
- M66.141Rupture of synovium, right hand
- M66.142Rupture of synovium, left hand
- M66.143Rupture of synovium, unspecified hand
- M66.144Rupture of synovium, right finger(s)
- M66.145Rupture of synovium, left finger(s)
- M66.146Rupture of synovium, unspecified finger(s)
- M66.151Rupture of synovium, right hip
- M66.152Rupture of synovium, left hip
- M66.159Rupture of synovium, unspecified hip
- M66.171Rupture of synovium, right ankle
- M66.172Rupture of synovium, left ankle
- M66.173Rupture of synovium, unspecified ankle
- M66.174Rupture of synovium, right foot
- M66.175Rupture of synovium, left foot
- M66.176Rupture of synovium, unspecified foot
- M66.177Rupture of synovium, right toe(s)
- M66.178Rupture of synovium, left toe(s)
- M66.179Rupture of synovium, unspecified toe(s)
M66.1 at a glance
| Code | M66.1 |
|---|---|
| Description | Rupture of synovium |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here
The conditions below are not part of M66.1, but a patient may have both at the same time. When documentation supports it, M66.1 and the excluded code may both be reported.
- rupture of popliteal cyst (M66.0)
Inclusion terms
Alternative wording in documentation that is classified to M66.1.
- Rupture of synovial cyst
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M66.1, but a patient may have both at the same time. When documentation supports it, M66.1 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)
Excludes2 — not included here — inherited from M66
The conditions below are not part of M66.1, but a patient may have both at the same time. When documentation supports it, M66.1 and the excluded code may both be reported.
- rotator cuff syndrome (M75.1-)
- rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
What codes fall under M66.1? (8)
- M66.10Rupture of synovium, unspecified joint
- M66.11Rupture of synovium, shouldernot billable
- M66.12Rupture of synovium, elbownot billable
- M66.13Rupture of synovium, wristnot billable
- M66.14Rupture of synovium, hand and fingersnot billable
- M66.15Rupture of synovium, hipnot billable
- M66.17Rupture of synovium, ankle, foot and toesnot billable
- M66.18Rupture of synovium, other site
How long has M66.1 existed?
M66.1 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.