M50.021 — Cervical disc disorder at C4-C5 level with myelopathy
Is M50.021 billable?
Yes — M50.021 is billable for FY2027. M50.021 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M50.021 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M50.021 at a glance
| Code | M50.021 |
|---|---|
| Description | Cervical disc disorder at C4-C5 level with myelopathy |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M50.021 group to?
M50.021 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.
- 551Medical Back Problems with MCCmedical
- 552Medical Back Problems without MCCmedical
As a secondary diagnosis, M50.021 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is M50.021 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to M50.021. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disorder › disc › cervical › with › myelopathy › C4-C5 (of)
Inclusion terms
Alternative wording in documentation that is classified to M50.021.
- C4-C5 disc disorder with myelopathy
Excludes1 — never code together — inherited from M50-M54
The conditions below can never be reported together with M50.021 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- current injury - see injury of spine by body region
- discitis NOS (M46.4-)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M50.021, but a patient may have both at the same time. When documentation supports it, M50.021 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)
How long has M50.021 existed?
M50.021 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.