2021 ICD-10-CM Code C79.81

Secondary malignant neoplasm of breast

Version 2021

Valid for Submission

C79.81 is a billable diagnosis code used to specify a medical diagnosis of secondary malignant neoplasm of breast. The code C79.81 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code C79.81 might also be used to specify conditions or terms like malignant neoplasm of axillary tail of female breast, malignant neoplasm of breast lower inner quadrant, malignant neoplasm of breast lower outer quadrant, malignant neoplasm of breast upper inner quadrant, malignant neoplasm of breast upper outer quadrant , malignant neoplasm of central part of female breast, etc.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic areola ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) areola ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) axillary tail ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) central portion ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) inner ; Neoplasm, neoplastic breast (connective tissue) (glandular tissue) (soft parts) lower ; etc

ICD-10:C79.81
Short Description:Secondary malignant neoplasm of breast
Long Description:Secondary malignant neoplasm of breast

Code Classification

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 C79.81 are found in the index:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert C79.81 to ICD-9 Code

Table of Neoplasms

The code C79.81 is included in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»Neoplasm, neoplastic
  »areola
C50.0C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
C50.9C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »areola
C50.0C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »axillary tail
C50.6C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »central portion
C50.1C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »inner
C50.8C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »lower
C50.8C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »lower-inner quadrant
C50.3C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »lower-outer quadrant
C50.5C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »mastectomy site (skin) [See Also: Neoplasm, breast, skin]
      »specified as breast tissue
C50.8C79.81
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »midline
C50.8C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »nipple
C50.0C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »outer
C50.8C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »tail (axillary)
C50.6C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »upper
C50.8C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »upper-inner quadrant
C50.2C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »breast (connective tissue) (glandular tissue) (soft parts)
    »upper-outer quadrant
C50.4C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »mastectomy site (skin) [See Also: Neoplasm, breast, skin]
    »specified as breast tissue
C50.8C79.81
»Neoplasm, neoplastic
  »nipple
C50.0C79.81D05.D24.
»Neoplasm, neoplastic
  »skin NOS
    »mastectomy site (skin) [See Also: Neoplasm, skin, breast]
      »specified as breast tissue
C50.8C79.81

Information for Patients


Breast Cancer

Breast cancer affects one in eight women during their lives. No one knows why some women get breast cancer, but there are many risk factors. Risks that you cannot change include

Other risks include obesity, using hormone replacement therapy (also called menopausal hormone therapy), taking birth control pills, drinking alcohol, not having children or having your first child after age 35, and having dense breasts.

Symptoms of breast cancer may include a lump in the breast, a change in size or shape of the breast, and discharge from a nipple. Breast self-exams and mammography can help find breast cancer early, when it is most treatable. One possible treatment is surgery. It could be a lumpectomy or a mastectomy. Other treatments include radiation therapy, chemotherapy, hormone therapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells.

Men can have breast cancer, too, but it is rare.

NIH: National Cancer Institute


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)