ICD-10 N18.3
Non-Billable HeaderChronic kidney disease, stage 3 (moderate)
About ICD-10-CM N18.3
ICD-10-CM code N18.3 represents Chronic kidney disease, stage 3 (moderate). This is a non-billable header code in the Genitourinary System chapter (block N18). The 2026 edition of ICD-10-CM N18.3 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Medicare LCD Coverage for N18.3
Local Coverage Determinations (LCDs) from CMS MACs that list N18.3 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing N18.3.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but N18.3 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with N18.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 99215 Complex chronic disease management Internal Medicine
- 99490 Chronic Care Management — 2+ chronic conditions required Internal Medicine
- 99205 New patient office visit — complex/high-risk: uncontrolled diabetes, heart failure, COPD exacerbation, cancer, MS, RA, CKD, CAD, recurrent depression, epilepsy, lupus, syncope, cognitive decline Primary Care
- 99214 Established patient — moderate complexity: uncontrolled HTN, diabetes with complications, multiple chronic conditions, COPD, AFib, CKD, sleep apnea, chronic pain, depression Primary Care
- 80053 Comprehensive metabolic panel — diabetes, HTN, CKD, hyperlipidemia, electrolyte disorders, anemia, thyroid, prediabetes, abnormal labs, routine exam, screening Laboratory
- 80048 Basic metabolic panel — diabetes, HTN, CKD, electrolyte disorders, abnormal labs, routine exam, HF, dehydration Laboratory
Convert N18.3 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 |
|---|---|---|
| N18.3 | 5853 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To N18.3
Other codes in section N17-N19 (Acute kidney failure and chronic kidney disease).
ICD-10 N18.3, Billing FAQ
Is ICD-10 code N18.3 billable? +
No, N18.3 is a non-billable header code. Use a more specific child code from block N18 when submitting claims.
What CPT codes are commonly billed with N18.3? +
Procedures frequently paired with N18.3 include: 99215, 99490, 99205, 99214, 80053.
What ICD-9 codes does N18.3 map to? +
Per CMS GEMs, N18.3 maps to ICD-9 codes: 5853. 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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