
ICD-10 Codes for Neurology Billing: Neurological Code Reference
Reference for ICD-10-CM codes used in neurology billing. Covers G00-G99 neurological codes, common neurological diagnoses, and documentation specificity.
Using NEUROLOGY on a Claim
Reference for ICD-10-CM codes used in neurology billing. Covers G00-G99 neurological codes, common neurological diagnoses, and documentation specificity.
Source: AAPC Codify - ICD-10-CM 2025
NEUROLOGY in Detail
What does NEUROLOGY cover in detail?
Neurology ICD-10-CM codes include G00–G99 for neurological conditions, covering epilepsy, Parkinson's disease, headache disorders, and peripheral neuropathy, with documentation-driven specificity requirements.
See our ICD-10 codes hub and neurology billing guide for code selection guidance, and contact our medical coding team for neurology-specific support.

Using NEUROLOGY Correctly
How do I use NEUROLOGY correctly?
Specificity Requirements
ICD-10-CM requires the highest level of specificity. Use the most specific code available that is supported by clinical documentation.
Documentation Support
Clinical notes must clearly state the diagnosis that supports this code. Coders assign codes based on documented provider statements.
Procedure Linkage
Link this diagnosis code accurately to all procedures billed to demonstrate medical necessity for each service.
Payer Coverage
Verify that the payer covers the services billed with this diagnosis code. Some payers have limited coverage lists for specific ICD-10 codes.
Common Neurology ICD-10-CM Codes
| ICD-10 Code | Description | Category |
|---|---|---|
| G20 | Parkinson's disease | Extrapyramidal and movement disorders |
| G35.D | Multiple sclerosis, unspecified | Demyelinating diseases |
| G35.A | Relapsing-remitting multiple sclerosis | Demyelinating diseases |
| G40.909 | Epilepsy, unspecified, not intractable, without status epilepticus | Epilepsy |
| G43.909 | Migraine, unspecified, not intractable, without status migrainosus | Migraine |
| G43.701 | Chronic migraine without aura, not intractable, with status migrainosus | Migraine |
| G47.00 | Insomnia, unspecified | Sleep disorders |
| G47.33 | Obstructive sleep apnea (adult) | Sleep disorders |
| G47.10 | Hypersomnia, unspecified | Sleep disorders |
Source: AAPC Codify - ICD-10-CM 2025
Related Billing Resources
NEUROLOGY, Frequently Asked Questions
Neurology ICD-10-CM codes include G00–G99 for neurological conditions, covering epilepsy, Parkinson's disease, headache disorders, and peripheral neuropathy, with documentation-driven specificity requirements.
See our ICD-10 codes hub and neurology billing guide for code selection guidance, and contact our medical coding team for neurology-specific support.
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