ICD-10 G09
Billable / SpecificSequelae of inflammatory diseases of central nervous system
About ICD-10-CM G09
ICD-10-CM code G09 represents Sequelae of inflammatory diseases of central nervous system. This is a billable/specific code in the Nervous System chapter (block G09). The 2026 edition of ICD-10-CM G09 became effective on October 1, 2025.
Coding Notes
Code First
- condition resulting from (sequela) of inflammatory diseases of central nervous system
Medicare LCD Coverage for G09
Local Coverage Determinations (LCDs) from CMS MACs that list G09 as a covered diagnosis.
Showing top 10 of 28 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G09.
1 Cigna
1 Medicare
CPT Codes Commonly Billed with G09
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert G09 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 |
|---|---|---|
| G09 | 326 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G09
Other codes in section G00-G09 (Inflammatory diseases of the central nervous system).
ICD-10 G09, Billing FAQ
Is ICD-10 code G09 billable? +
Yes, G09 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does G09 map to? +
Per CMS GEMs, G09 maps to ICD-9 codes: 326. Useful for legacy data review and historical claim analysis.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 18, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team