G37.9
Demyelinating disease of central nervous system, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 7 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 8 never code together
G00-G99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
G37.9code
Inclusion terms
- Clinically isolated syndromes
Index entries leading here 5
- Sclerosis, sclerotic
- brain (generalized) (lobular) G37.9
- Demyelination, demyelinization
- central nervous system G37.9
- Syndrome — see also Disease
- Degeneration, degenerative
- myelin, central nervous system G37.9
- Disease, diseased — see also Syndrome
- demyelinating, demyelinizating (nervous system) G37.9
Alongside this code 7 same parent — G37
G37.0 Diffuse sclerosis of central nervous system G37.1 Central demyelination of corpus callosum G37.2 Central pontine myelinolysis G37.3 Acute transverse myelitis in demyelinating disease of cnsl G37.4 Subacute necrotizing myelitis of central nervous system G37.5 Concentric sclerosis [Balo] of central nervous system G37.8 Oth demyelinating diseases of central nervous system category
Medications 4
693 Central Nervous System Diseases drugs 80 Central Nervous System Infections drugs 268 Cardiac Conduction System Disease drugs 16 Autonomic Nervous System Diseases drugs
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.