ICD-10-CM · Billable Code
N63.31 — Unspecified lump in axillary tail of the right breast
Chapter N00-N99: Diseases of the genitourinary system
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Common questions about N63.31 (Unspecified lump in axillary tail of the right breast)
What does ICD-10 code N63.31 mean?
N63.31 is the ICD-10-CM 2025 code for Unspecified lump in axillary tail of the right breast. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is N63.31 a billable diagnosis code?
Yes, N63.31 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does N63.31 belong to?
N63.31 belongs to the chapter "Diseases of the genitourinary system" (codes N00-N99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Unspecified lump in axillary tail of the right breast?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗