ICD-10 G61.9
Billable / Specific HCC v28: 75Inflammatory polyneuropathy, unspecified
About ICD-10-CM G61.9
ICD-10-CM code G61.9 represents Inflammatory polyneuropathy, unspecified. This is a billable/specific code in the Nervous System chapter (block G61). The 2026 edition of ICD-10-CM G61.9 became effective on October 1, 2025.
Coding Tips for G61.9
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G61.9 is a CMS-HCC v28 risk-adjustment code (category 75). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for G61.9
Local Coverage Determinations (LCDs) from CMS MACs that list G61.9 as a covered diagnosis.
Showing top 10 of 46 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing G61.9.
2 Cigna
4 Medicare
1 Aetna
CPT Codes Commonly Billed with G61.9
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 G61.9 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 |
|---|---|---|
| G61.9 | 3579 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To G61.9
Other codes in section G60-G65 (Polyneuropathies and other disorders of the peripheral nervous system).
ICD-10 G61.9, Billing FAQ
Is ICD-10 code G61.9 billable? +
Yes, G61.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does G61.9 affect Medicare Advantage HCC risk adjustment? +
Yes. G61.9 maps to CMS-HCC v28 category 75. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What ICD-9 codes does G61.9 map to? +
Per CMS GEMs, G61.9 maps to ICD-9 codes: 3579. 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 May 31, 2026.
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