ICD-10 G90.B
Billable / Specific HCC v28: 52LMNB1-related autosomal dominant leukodystrophy
About ICD-10-CM G90.B
ICD-10-CM code G90.B represents LMNB1-related autosomal dominant leukodystrophy. This is a billable/specific code in the Nervous System chapter (block G90). The 2026 edition of ICD-10-CM G90.B became effective on October 1, 2025.
Coding Tips for G90.B
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
G90.B is a CMS-HCC v28 risk-adjustment code (category 52). 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 G90.B
Local Coverage Determinations (LCDs) from CMS MACs that list G90.B 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 G90.B.
1 Medicare
CPT Codes Commonly Billed with G90.B
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.
Codes Adjacent To G90.B
Other codes in section G89-G99 (Other disorders of the nervous system).
ICD-10 G90.B, Billing FAQ
Is ICD-10 code G90.B billable? +
Yes, G90.B is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does G90.B affect Medicare Advantage HCC risk adjustment? +
Yes. G90.B maps to CMS-HCC v28 category 52. Capture this diagnosis annually for accurate Medicare Advantage risk score.
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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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