G90.B — LMNB1-related autosomal dominant leukodystrophy
G90.B is a billable, specific ICD-10-CM code for lmnb1-related autosomal dominant leukodystrophy. It is valid for submission on a claim.
Risk adjustment
G90.B risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 200 Friedreich and Other Hereditary Ataxias; Huntington Disease0.279 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
G90.B is named in 2 Medicare coverage policies — 1 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56562Billing and Coding: Health and Behavior Assessment/Interventionnot covered
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
How G90.B 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 G90.B.
- Leukodystrophy›LMNB1-related autosomal dominant
Related codes at this level
Codes that share G90. If G90.B is not quite right, the correct code is usually one of these.
- G90.0Idiopathic peripheral autonomic neuropathy
- G90.1Familial dysautonomia [Riley-Day]
- G90.2Horner's syndrome
- G90.3Multi-system degeneration of the autonomic nervous system
- G90.4Autonomic dysreflexia
- G90.5Complex regional pain syndrome I (CRPS I)
- G90.8Other disorders of autonomic nervous system
- G90.9Disorder of the autonomic nervous system, unspecified
- G90.APostural orthostatic tachycardia syndrome [POTS]
Questions about G90.B
- Is G90.B a billable ICD-10-CM code?
- Yes. G90.B is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G90.B sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).