G37.89 — Other specified demyelinating diseases of central nervous system
G37.89 is a billable, specific ICD-10-CM code for other specified demyelinating diseases of central nervous system. It is valid for submission on a claim.
Risk adjustment
G37.89 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 198 Multiple Sclerosis0.647 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
G37.89 is named in 18 Medicare coverage policies — 18 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
- A56612Billing and Coding: CT of the Head
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
How G37.89 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G37.89.
- Demyelination, demyelinization›central nervous system›specified NEC
- Disease, diseased›demyelinating, demyelinizating›specified NEC
Related codes at this level
Codes that share G37.8. If G37.89 is not quite right, the correct code is usually one of these.
Questions about G37.89
- Is G37.89 a billable ICD-10-CM code?
- Yes. G37.89 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G37.89 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Demyelinating diseases of the central nervous system (G35-G37).