ICD-10 Code N63.0

Unspecified lump in unspecified breast

Version 2019 Billable Code Revised Code
ICD-10: N63.0
Short Description:Unspecified lump in unspecified breast
Long Description:Unspecified lump in unspecified breast

Valid for Submission

ICD-10 N63.0 is a billable code used to specify a medical diagnosis of unspecified lump in unspecified breast. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Revised 2019 ICD-10 Code

N63.0 was revised for the FY 2019, effective October 1, 2018.

Code Classification

  • Diseases of the genitourinary system (N00–N99)
    • Disorders of breast (N60-N65)
      • Unspecified lump in breast (N63)

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code N63.0 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.


Convert N63.0 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 611.72 - Lump or mass in breast (Approximate Flag)


The following clinical terms are approximate synonyms:

  • Breast lump
  • Breast lump present
  • Breast lump symptom
  • Chest swelling
  • Nodule of skin of breast
  • O/E - breast lump - melon size
  • O/E - breast lump - pea size
  • O/E - breast lump - plum size
  • O/E - breast lump consistency
  • O/E - breast lump fixed deep
  • O/E - breast lump hard
  • O/E - breast lump irregular
  • O/E - breast lump not tethered
  • O/E - breast lump palpated
  • O/E - breast lump position
  • O/E - breast lump regularity
  • O/E - breast lump size
  • O/E - breast lump smooth
  • O/E - breast lump soft
  • O/E - breast lump tethering
  • O/E - breast lump-orange size
  • O/E - shotty breast
  • O/E -breast lump fixed to skin
  • O/E -breast lump-lower in-quad
  • O/E-breast lump- axillary tail
  • O/E-breast lump-grapefruit size
  • O/E-breast lump-lower out-quad
  • O/E-breast lump-nipple/central
  • O/E-breast lump-tangerine size
  • O/E-breast lump-upper in-quad
  • O/E-breast lump-upper out-quad
  • Persistent breast nodularity
  • Swelling of breast

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code N63.0 are found in the index:

  • - Breast - See Also: condition;
    • - nodule - See Also: Lump, breast; - N63.0
  • - Mass
    • - breast - See Also: Lump, breast; - N63.0

Replacement Code

N630 replaces the following previously assigned ICD-10 code(s):

  • N63 - Unspecified lump in breast

Information for Patients

Breast Diseases

Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges (fluids that are not breast milk).

If you have a breast lump, pain, discharge or skin irritation, see your health care provider. Minor and serious breast problems have similar symptoms. Although many women fear cancer, most breast problems are not cancer.

Some common breast changes are

  • Fibrocystic breast changes - lumpiness, thickening and swelling, often just before a woman's period
  • Cysts - fluid-filled lumps
  • Fibroadenomas - solid, round, rubbery lumps that move easily when pushed, occurring most in younger women
  • Intraductal papillomas - growths similar to warts near the nipple
  • Blocked milk ducts
  • Milk production when a woman is not breastfeeding

NIH: National Cancer Institute

  • Breast - premenstrual tenderness and swelling (Medical Encyclopedia)
  • Breast biopsy -- stereotactic (Medical Encyclopedia)
  • Breast biopsy -- ultrasound (Medical Encyclopedia)
  • Breast infection (Medical Encyclopedia)
  • Breast lump (Medical Encyclopedia)
  • Breast MRI scan (Medical Encyclopedia)
  • Breast pain (Medical Encyclopedia)
  • Breast self exam (Medical Encyclopedia)
  • Breast skin and nipple changes (Medical Encyclopedia)
  • Fibroadenoma - breast (Medical Encyclopedia)
  • Fibrocystic breast disease (Medical Encyclopedia)
  • Gynecomastia (Medical Encyclopedia)
  • Intraductal papilloma (Medical Encyclopedia)
  • Nipple problems (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.