ICD-10 Code
International Classification of Diseases, 10th Revision
Oct 21, 2017

See: Unspecified lump in breast

N63 is NOT a complete or valid ICD 10 diagnosis code.

You should code each health care encounter to the level of certainty known for that encounter. When sufficient clinical information is not known or available to assign a more specific code, it is acceptable to report the appropriate unspecified code.

See below for more specifc codes relating to
Unspecified lump in breast
Inclusion Term
  • Nodule(s) NOS in breast

More specific codes for 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
  • N63.2 - 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
  • N63.3 - 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
Back to N63
See the 2017 ICD-10-CM Coding Guidelines.

Questions related to N63 Unspecified lump in breast

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.