M12 — Other and unspecified arthropathy
Not billable
Is M12 billable?
No — M12 is a non-billable header code. M12 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 M12.
Billable codes under this header
- M12.9Arthropathy, unspecified
- M12.00Chronic postrheumatic arthropathy [Jaccoud], unspecified site
- M12.08Chronic postrheumatic arthropathy [Jaccoud], other specified site
- M12.09Chronic postrheumatic arthropathy [Jaccoud], multiple sites
- M12.10Kaschin-Beck disease, unspecified site
- M12.18Kaschin-Beck disease, vertebrae
- M12.19Kaschin-Beck disease, multiple sites
- M12.20Villonodular synovitis (pigmented), unspecified site
- M12.28Villonodular synovitis (pigmented), other specified site
- M12.29Villonodular synovitis (pigmented), multiple sites
- M12.30Palindromic rheumatism, unspecified site
- M12.38Palindromic rheumatism, other specified site
- M12.39Palindromic rheumatism, multiple sites
- M12.40Intermittent hydrarthrosis, unspecified site
- M12.48Intermittent hydrarthrosis, other site
- M12.49Intermittent hydrarthrosis, multiple sites
- M12.50Traumatic arthropathy, unspecified site
- M12.58Traumatic arthropathy, other specified site
- M12.59Traumatic arthropathy, multiple sites
- M12.80Other specific arthropathies, not elsewhere classified, unspecified site
- M12.88Other specific arthropathies, not elsewhere classified, other specified site
- M12.89Other specific arthropathies, not elsewhere classified, multiple sites
- M12.011Chronic postrheumatic arthropathy [Jaccoud], right shoulder
- M12.012Chronic postrheumatic arthropathy [Jaccoud], left shoulder
- M12.019Chronic postrheumatic arthropathy [Jaccoud], unspecified shoulder
- M12.021Chronic postrheumatic arthropathy [Jaccoud], right elbow
- M12.022Chronic postrheumatic arthropathy [Jaccoud], left elbow
- M12.029Chronic postrheumatic arthropathy [Jaccoud], unspecified elbow
- M12.031Chronic postrheumatic arthropathy [Jaccoud], right wrist
- M12.032Chronic postrheumatic arthropathy [Jaccoud], left wrist
- M12.039Chronic postrheumatic arthropathy [Jaccoud], unspecified wrist
- M12.041Chronic postrheumatic arthropathy [Jaccoud], right hand
- M12.042Chronic postrheumatic arthropathy [Jaccoud], left hand
- M12.049Chronic postrheumatic arthropathy [Jaccoud], unspecified hand
- M12.051Chronic postrheumatic arthropathy [Jaccoud], right hip
- M12.052Chronic postrheumatic arthropathy [Jaccoud], left hip
- M12.059Chronic postrheumatic arthropathy [Jaccoud], unspecified hip
- M12.061Chronic postrheumatic arthropathy [Jaccoud], right knee
- M12.062Chronic postrheumatic arthropathy [Jaccoud], left knee
- M12.069Chronic postrheumatic arthropathy [Jaccoud], unspecified knee
- M12.071Chronic postrheumatic arthropathy [Jaccoud], right ankle and foot
- M12.072Chronic postrheumatic arthropathy [Jaccoud], left ankle and foot
- M12.079Chronic postrheumatic arthropathy [Jaccoud], unspecified ankle and foot
- M12.111Kaschin-Beck disease, right shoulder
- M12.112Kaschin-Beck disease, left shoulder
- M12.119Kaschin-Beck disease, unspecified shoulder
- M12.121Kaschin-Beck disease, right elbow
- M12.122Kaschin-Beck disease, left elbow
- M12.129Kaschin-Beck disease, unspecified elbow
- M12.131Kaschin-Beck disease, right wrist
- M12.132Kaschin-Beck disease, left wrist
- M12.139Kaschin-Beck disease, unspecified wrist
- M12.141Kaschin-Beck disease, right hand
- M12.142Kaschin-Beck disease, left hand
- M12.149Kaschin-Beck disease, unspecified hand
- M12.151Kaschin-Beck disease, right hip
- M12.152Kaschin-Beck disease, left hip
- M12.159Kaschin-Beck disease, unspecified hip
- M12.161Kaschin-Beck disease, right knee
- M12.162Kaschin-Beck disease, left knee
M12 at a glance
| Code | M12 |
|---|---|
| Description | Other and unspecified arthropathy |
| 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 M12 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 M12, but a patient may have both at the same time. When documentation supports it, M12 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 M12? (8)
- M12.0Chronic postrheumatic arthropathy [Jaccoud]not billable
- M12.1Kaschin-Beck diseasenot billable
- M12.2Villonodular synovitis (pigmented)not billable
- M12.3Palindromic rheumatismnot billable
- M12.4Intermittent hydrarthrosisnot billable
- M12.5Traumatic arthropathynot billable
- M12.8Other specific arthropathies, not elsewhere classifiednot billable
- M12.9Arthropathy, unspecified
How long has M12 existed?
M12 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.
Which codes are confused with M12?
ICD-10-CM declares these codes mutually exclusive with M12 — exactly one of each pair can be correct for a given encounter.