ICD-10 Code N63.0

Unspecified lump in unspecified breast

Diagnosis Code N63.0

ICD-10: N63.0
Short Description: Unspecified lump in unspecified breast
Long Description: Unspecified lump in unspecified breast
Version 2019 of the ICD-10-CM diagnosis code N63.0

Valid for Submission
The code N63.0 is valid for submission for 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)
Version 2019 Billable Code Updated Code

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code N63.0 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9
  • 611.72 - Lump or mass in breast (Approximate Flag)

  • 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
References found for the code N63.0 in the Index to Diseases and Injuries:

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

Replacement Code
This code replaces the following previously assigned ICD-10 code(s) listed below:
  • 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)

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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.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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