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3. Chapter - N00-N99
4. Section - N60-N65
5. Category - N63
6. N63.21

N63.21 - Unspecified lump in the left breast, upper outer quadrant

• Applicable to Unspecified lump in the left breast, upper outer quadrant
• The 2025 edition of ICD10-CM N63.21 became effective on October 1, 2024.
• This is the American ICD10-CM version of N63.21 - other international versions of ICD10 N63.21 may differ.
• N63.21 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above N63.21 contain annotation back-references that may be applicable to N63.21:

• Chapter: N00-N99 - Diseases of the genitourinary system
• Section: N60-N65 - Disorders of breast
• Category: N63 - Unspecified lump in breast

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.