ICD-10 N18.30
Billable / Specific HCC v28: 138Chronic kidney disease, stage 3 unspecified
About ICD-10-CM N18.30
ICD-10-CM code N18.30 represents Chronic kidney disease, stage 3 unspecified. This is a billable/specific code in the Genitourinary System chapter (block N18). The 2026 edition of ICD-10-CM N18.30 became effective on October 1, 2025.
Coding Tips for N18.30
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
N18.30 is a CMS-HCC v28 risk-adjustment code (category 138). 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 N18.30
Local Coverage Determinations (LCDs) from CMS MACs that list N18.30 as a covered diagnosis.
Showing top 10 of 184 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing N18.30.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with N18.30
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 82610 CMS LCD: Billing and Coding: Lab: Cystatin C Measurement CMS LCD
Codes Adjacent To N18.30
Other codes in section N17-N19 (Acute kidney failure and chronic kidney disease).
ICD-10 N18.30, Billing FAQ
Is ICD-10 code N18.30 billable? +
Yes, N18.30 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does N18.30 affect Medicare Advantage HCC risk adjustment? +
Yes. N18.30 maps to CMS-HCC v28 category 138. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with N18.30? +
Procedures frequently paired with N18.30 include: 82610.
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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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