M22.8X9 — Other disorders of patella, unspecified knee
Is M22.8X9 billable?
Yes, but M22.8X9 is an unspecified code. M22.8X9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, M22.8X9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting M22.8X9 — the more specific alternatives are listed below.
More specific alternatives
M22.8X9 at a glance
| Code | M22.8X9 |
|---|---|
| Description | Other disorders of patella, unspecified knee |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M22.8X9 group to?
M22.8X9 sits in MDC 08 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 562Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh with MCCmedical
- 563Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh without MCCmedical
How is M22.8X9 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M22.8X, the nearest indexed parent of M22.8X9. Use them to find the family, then select the specific code.
- Disorder › patella › specified NEC (of)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M22.8X9, but a patient may have both at the same time. When documentation supports it, M22.8X9 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 M20-M25
The conditions below are not part of M22.8X9, but a patient may have both at the same time. When documentation supports it, M22.8X9 and the excluded code may both be reported.
- joints of the spine (M40-M54)
Excludes2 — not included here — inherited from M22
The conditions below are not part of M22.8X9, but a patient may have both at the same time. When documentation supports it, M22.8X9 and the excluded code may both be reported.
- traumatic dislocation of patella (S83.0-)
How long has M22.8X9 existed?
M22.8X9 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.