N63.0 Unspecified lump in unspecified breast

Billable ICD-10-CM code, FY2026.

Applies from N63 Unspecified lump in breast

Applicable to

• Nodule(s) NOS in breast

MS-DRG index

Defines the logic of DRG(s) 600-601 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 611.72 Lump or mass in breast (approximate)

Code annotations containing back-references to N63.0

Back-references to N63

• Type 2 Excludes: R22.2 Localized swelling, mass and lump, trunk ("breast mass and lump (N63)")

Diagnosis Index entries for N63.0

• Breast › nodule
• Lump › breast
• Mass › breast
• Nodule (s), nodular › breast NEC
• Swelling (of) › breast

Nearby codes

• N63 Unspecified lump in breast
• N63.0 Unspecified lump in unspecified breast (this code)
• N63.1 Unspecified lump in the right breast
• N63.10 Unspecified lump in the right breast, unspecified quadrant
• N63.11 Unspecified lump in the right breast, upper outer quadrant
• N63.12 Unspecified lump in the right breast, upper inner quadrant
• N63.13 Unspecified lump in the right breast, lower outer quadrant