G37.89 — Other specified demyelinating diseases of central nervous system
Is G37.89 billable?
Yes, but G37.89 is an unspecified code. G37.89 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, G37.89 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 G37.89 — the more specific alternatives are listed below.
More specific alternatives
G37.89 at a glance
| Code | G37.89 |
|---|---|
| Description | Other specified demyelinating diseases of central nervous system |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does G37.89 group to?
G37.89 sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 058Multiple Sclerosis and Cerebellar Ataxia with MCCmedical
- 059Multiple Sclerosis and Cerebellar Ataxia with CCmedical
- 060Multiple Sclerosis and Cerebellar Ataxia without CC/MCCmedical
As a secondary diagnosis, G37.89 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is G37.89 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G37.89. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Demyelination, demyelinization › central nervous system › specified NEC
- Disease, diseased › demyelinating, demyelinizating › specified NEC
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G37.89, but a patient may have both at the same time. When documentation supports it, G37.89 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- 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 G37.89 existed?
G37.89 first appears in FY2024.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.