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  3. N00–N99
  4. N60-N65
  5. Unspecified lump in breast (N63)

Unspecified lump in breast (N63)

The ICD-10 code N63 and its subcodes are used to classify an unspecified lump in the breast, covering various locations such as unspecified breast, right or left breast, specific quadrants, axillary tail, and subareolar areas. These codes help document nonmalignant breast lumps when the cause or exact diagnosis is not specified.

These codes include N63.0 for lumps in an unspecified breast and detailed subcodes for lumps located in the right breast (N63.1 series) and left breast (N63.2 series), broken down further by specific breast quadrants; such as upper outer, upper inner, lower outer, and lower inner quadrants. For example, N63.11 represents an unspecified lump in the upper outer quadrant of the right breast, also known as a “lump in upper outer quadrant of right breast.” Additionally, lumps in the axillary tail of the breast and subareolar areas have their respective codes, like N63.31 and N63.41. Terms like “breast lump,” “mass of nipple of breast,” “soft lump of breast,” or “chest swelling” commonly correspond to these ICD-10 codes. These codes are crucial for medical coders to accurately record and track cases where a breast lump is noted but not yet definitively diagnosed or specified as benign or malignant.

  • Diseases of the genitourinary system (N00–N99)

    • Disorders of breast (N60-N65)

        • Unspecified lump in breast (N63)

        • N63 Unspecified lump in breast
        • N63.0 Unspecified lump in unspecified breast
        • 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
        • N63.14 Unspecified lump in the right breast, lower inner quadrant
        • N63.15 Unspecified lump in the right breast, overlapping quadrants
        • N63.2 Unspecified lump in the left breast
        • N63.20 Unspecified lump in the left breast, unspecified quadrant
        • N63.21 Unspecified lump in the left breast, upper outer quadrant
        • N63.22 Unspecified lump in the left breast, upper inner quadrant
        • N63.23 Unspecified lump in the left breast, lower outer quadrant
        • N63.24 Unspecified lump in the left breast, lower inner quadrant
        • N63.25 Unspecified lump in the left breast, overlapping quadrants
        • N63.3 Unspecified lump in axillary tail
        • N63.31 Unspecified lump in axillary tail of the right breast
        • N63.32 Unspecified lump in axillary tail of the left breast
        • N63.4 Unspecified lump in breast, subareolar
        • N63.41 Unspecified lump in right breast, subareolar
        • N63.42 Unspecified lump in left breast, subareolar

Instructional Notations

Inclusion Terms

These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

  • Nodule(s) NOS in breast