ICD-10 G46.3
Billable / SpecificBrain stem stroke syndrome
About ICD-10-CM G46.3
ICD-10-CM code G46.3 represents Brain stem stroke syndrome. This is a billable/specific code in the Nervous System chapter (block G46). The 2026 edition of ICD-10-CM G46.3 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under G46.3. Per CMS ICD-10-CM Tabular 2026.
- Benedikt syndrome
- Claude syndrome
- Foville syndrome
- Millard-Gubler syndrome
- Wallenberg syndrome
- Weber syndrome
Medicare LCD Coverage for G46.3
Local Coverage Determinations (LCDs) from CMS MACs that list G46.3 as a covered diagnosis.
Showing top 10 of 200 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G46.3.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with G46.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93882 CMS LCD: Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies CMS LCD
Convert G46.3 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| G46.3 | 4378 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G46.3
Other codes in section G40-G47 (Episodic and paroxysmal disorders).
ICD-10 G46.3, Billing FAQ
Is ICD-10 code G46.3 billable? +
Yes, G46.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to G46.3? +
ICD-10 G46.3 includes: Benedikt syndrome; Claude syndrome; Foville syndrome, and 3 more clinical synonyms.
What CPT codes are commonly billed with G46.3? +
Procedures frequently paired with G46.3 include: 93882.
What ICD-9 codes does G46.3 map to? +
Per CMS GEMs, G46.3 maps to ICD-9 codes: 4378. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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