N63.4 (Unspecified lump in breast, subareolar) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the genitourinary system chapter. It identifies cases of unspecified lump in breast, subareolar for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

N63.4 — Unspecified lump in breast, subareolar

Chapter N00-N99: Diseases of the genitourinary system

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Sub-codes under N63.4

N63.41Unspecified lump in right breast, subareolarN63.42Unspecified lump in left breast, subareolar

Related diagnoses

N63.0Unspecified lump in unspecified breastN63.1Unspecified lump in the right breastN63.2Unspecified lump in the left breastN63.3Unspecified lump in axillary tail

Common questions about N63.4 (Unspecified lump in breast, subareolar)

What does ICD-10 code N63.4 mean?
N63.4 is the ICD-10-CM 2025 code for Unspecified lump in breast, subareolar. 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 N63.4 a billable diagnosis code?
N63.4 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under N63.4. Browse the sub-codes listed on this page.
Which ICD-10 chapter does N63.4 belong to?
N63.4 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 breast, subareolar?
For a plain-language explanation of Unspecified lump in breast, subareolar, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Unspecified lump in breast, subareolar" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗