ICD-10 N63
Non-Billable HeaderUnspecified lump in breast
About ICD-10-CM N63
ICD-10-CM code N63 represents Unspecified lump in breast. This is a non-billable header code in the Genitourinary System chapter (block N63). The 2026 edition of ICD-10-CM N63 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.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under N63. Per CMS ICD-10-CM Tabular 2026.
- Nodule(s) NOS in breast
Medicare LCD Coverage for N63
Local Coverage Determinations (LCDs) from CMS MACs that list N63 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 N63.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but N63 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with N63
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 N63 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 |
|---|---|---|
| N63 | 61172 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To N63
Other codes in section N60-N65 (Disorders of breast).
ICD-10 N63, Billing FAQ
Is ICD-10 code N63 billable? +
No, N63 is a non-billable header code. Use a more specific child code from block N63 when submitting claims.
What other names or terms map to N63? +
ICD-10 N63 includes: Nodule(s) NOS in breast.
What ICD-9 codes does N63 map to? +
Per CMS GEMs, N63 maps to ICD-9 codes: 61172. 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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