2024 ICD-10-CM Diagnosis Code C50.919

Malignant neoplasm of unspecified site of unspecified female breast

ICD-10-CM Code:
C50.919
ICD-10 Code for:
Malignant neoplasm of unsp site of unspecified female breast
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

Code Classification

  • Neoplasms
    (C00–D49)
    • Malignant neoplasms of breast
      (C50)
      • Malignant neoplasm of breast
        (C50)

C50.919 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of unspecified site of unspecified female breast. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

This code is applicable to female patients only. It is clinically and virtually impossible to use this code on a non-female patient.

Unspecified diagnosis codes like C50.919 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Adenocarcinoma of breast
  • Blood/lymphatic vessel invasion by tumor absent
  • Blood/lymphatic vessel invasion by tumor indeterminate
  • Blood/lymphatic vessel invasion by tumor present
  • Carcinoma of bone, connective tissue, skin and breast
  • Carcinoma of breast
  • Carcinoma of female breast
  • Carcinoma of salivary gland type of breast
  • Eccrine ductal carcinoma
  • Familial cancer of breast
  • Familial cancer of breast
  • Familial ovarian cancer
  • Germline BRCA-mutated, HER2-negative metastatic breast cancer
  • HER2-positive carcinoma of breast
  • Hereditary breast and ovarian cancer syndrome
  • Hormone receptor negative neoplasm
  • Hormone receptor positive malignant neoplasm of breast
  • Hormone receptor positive tumor
  • Human epidermal growth factor 2 negative carcinoma of breast
  • Human epidermal growth factor 2 negative carcinoma of breast
  • Infiltrating duct carcinoma of breast
  • Infiltrating duct carcinoma of female breast
  • Infiltrating ductal carcinoma of breast, stage 1
  • Infiltrating ductal carcinoma of breast, stage 2
  • Infiltrating ductal carcinoma of breast, stage 3
  • Infiltrating ductal carcinoma of breast, stage 4
  • Infiltrating lobular carcinoma of breast
  • Infiltrating lobular carcinoma of breast
  • Infiltrating lobular carcinoma of breast
  • Infiltrating lobular carcinoma of left female breast
  • Inflammatory carcinoma of breast
  • Inflammatory carcinoma of breast
  • Invasive carcinoma of breast
  • Local recurrence of malignant tumor of breast
  • Locally advanced breast cancer
  • Malignant melanoma of breast
  • Malignant neoplasm of bone, connective tissue, skin and breast
  • Malignant neoplasm of bone, connective tissue, skin and breast
  • Malignant neoplasm of ectopic site of female breast
  • Malignant neoplasm of female breast
  • Malignant phyllodes tumor of breast
  • Malignant tumor of breast
  • Metaplastic carcinoma of breast
  • Metastatic human epidermal growth factor 2 positive carcinoma of breast
  • Metastatic lobular carcinoma to breast
  • Metastatic lobular carcinoma to breast
  • Metastatic lobular carcinoma to left female breast
  • Metastatic malignant neoplasm to left breast
  • Mixed ductal and lobular carcinoma of breast
  • Mucinous carcinoma of breast
  • Neoplasm of ectopic female breast tissue
  • Neoplasm of ectopic female breast tissue
  • Phyllodes tumor of breast
  • Phyllodes tumor of breast
  • Primary angiosarcoma of breast
  • Primary angiosarcoma of thorax
  • Primary angiosarcoma of trunk
  • Primary infiltrating duct carcinoma of breast
  • Primary infiltrating duct carcinoma of female breast
  • Primary infiltrating lobular carcinoma of breast
  • Primary intracystic papillary carcinoma of breast
  • Primary invasive malignant neoplasm of female breast
  • Primary invasive pleomorphic lobular carcinoma of breast
  • Primary malignant inflammatory neoplasm of female breast
  • Primary malignant neoplasm of breast
  • Primary malignant neoplasm of ectopic female breast tissue
  • Primary malignant neoplasm of female breast
  • Primary malignant phyllodes tumor of breast
  • Primary mixed ductal and lobular carcinoma of breast
  • Primary mucinous carcinoma of breast
  • Primary scirrhous carcinoma of breast
  • Primary solid papillary carcinoma with invasion of breast
  • Sarcoma of breast
  • Sarcoma of breast
  • Sarcoma of female breast
  • Scirrhous carcinoma of breast
  • Triple-negative breast cancer

Clinical Classification

Clinical Information

  • Hereditary Breast and Ovarian Cancer Syndrome

    autosomal dominant hereditary cancer syndrome in which a mutation most often in either brca1 or brca2 is associated with a significantly increased risk for breast and ovarian cancers.
  • Neoplastic Syndromes, Hereditary

    the condition of a pattern of malignancies within a family, but not every individual's necessarily having the same neoplasm. characteristically the tumor tends to occur at an earlier than average age, individuals may have more than one primary tumor, the tumors may be multicentric, usually more than 25 percent of the individuals in direct lineal descent from the proband are affected, and the cancer predisposition in these families behaves as an autosomal dominant trait with about 60 percent penetrance.

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • Diagnoses for females only - The Medicare Code Editor detects inconsistencies between a patient’s sex and any diagnosis on the patient’s record, these edits apply to FEMALES only .

Convert C50.919 to ICD-9-CM

  • ICD-9-CM Code: 174.9 - Malign neopl breast NOS
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Breast Cancer

What is breast cancer?

Breast cancer is a cancer that starts in breast tissue. It happens when cells in the breast change and grow out of control. The cells usually form a tumor.

Sometimes the cancer does not spread any further. This is called "in situ." If the cancer spreads outside the breast, the cancer is called "invasive." It may just spread to nearby tissues and lymph nodes. Or the cancer may metastasize (spread to other parts of the body) through the lymph system or the blood.

Breast cancer is the second most common type of cancer in women in the United States. Rarely, it can also affect men.

What are the types of breast cancer?

There are different types of breast cancer. The types are based on which breast cells turn into cancer. The types include:

  • Ductal carcinoma, which begins in the cells of the ducts. This is the most common type.
  • Lobular carcinoma, which begins in the lobules. It is more often found in both breasts than other types of breast cancer.
  • Inflammatory breast cancer, in which cancer cells block lymph vessels in the skin of the breast. The breast becomes warm, red, and swollen. This is a rare type.
  • Paget's disease of the breast, which is a cancer involving the skin of the nipple. It usually also affects the darker skin around the nipple. It is also rare.

What causes breast cancer?

Breast cancer happens when there are changes in the genetic material (DNA). Often, the exact cause of these genetic changes is unknown.

But sometimes these genetic changes are inherited, meaning that you are born with them. Breast cancer that is caused by inherited genetic changes is called hereditary breast cancer.

There are also certain genetic changes that can raise your risk of breast cancer, including changes in the BRCA1 and BRCA2 genes. These two changes also raise your risk of ovarian and other cancers.

Besides genetics, your lifestyle and the environment can affect your risk of breast cancer.

Who is at risk for breast cancer?

The factors that raise your risk of breast cancer include:

  • Older age
  • History of breast cancer or benign (noncancer) breast disease
  • Inherited risk of breast cancer, including having BRCA1 and BRCA2 gene changes
  • Dense breast tissue
  • A reproductive history that leads to more exposure to the estrogen hormone, including
    • Menstruating at an early age
    • Being at an older age when you first gave birth or never having given birth
    • Starting menopause at a later age
  • Taking hormone therapy for symptoms of menopause
  • Radiation therapy to the breast or chest
  • Obesity
  • Drinking alcohol

What are the signs and symptoms of breast cancer?

The signs and symptoms of breast cancer include:

  • A new lump or thickening in or near the breast or in the armpit.
  • A change in the size or shape of the breast.
  • A dimple or puckering in the skin of the breast. It may look like the skin of an orange.
  • A nipple turned inward into the breast.
  • Nipple discharge other than breast milk. The discharge might happen suddenly, be bloody, or happen in only one breast.
  • Scaly, red, or swollen skin in the nipple area or the breast
  • Pain in any area of the breast.

How is breast cancer diagnosed?

Your health care provider may use many tools to diagnose breast cancer and figure out which type you have:

  • A physical exam, including a clinical breast exam (CBE). This involves checking for any lumps or anything else that seems unusual with the breasts and armpits.
  • A medical history.
  • Imaging tests, such as a mammogram, an ultrasound, or an MRI.
  • Breast biopsy.
  • Blood chemistry tests, which measure different substances in the blood, including electrolytes, fats, proteins, glucose (sugar), and enzymes. Some of the specific blood chemistry tests include a basic metabolic panel (BMP), a comprehensive metabolic panel (CMP), and an electrolyte panel.

If these tests show that you have breast cancer, you will have tests that study the cancer cells. These tests help your provider decide which treatment would be best for you. The tests may include:

  • Genetic tests for genetic changes such as in the BRCA and TP53 genes.
  • HER2 test. HER2 is a protein involved with cell growth. It is on the outside of all breast cells. If your breast cancer cells have more HER2 than normal, they can grow more quickly and spread to other parts of the body.
  • An estrogen and progesterone receptor test. This test measures the amount of estrogen and progesterone (hormones) receptors in cancer tissue. If there are more receptors than normal, the cancer is called estrogen and/or progesterone receptor positive. This type of breast cancer may grow more quickly.

Another step is staging the cancer. Staging involves doing tests to find out whether the cancer has spread within the breast or to other parts of the body. The tests may include other diagnostic imaging tests and a sentinel lymph node biopsy. This biopsy is done to see whether the cancer has spread to the lymph nodes.

What are the treatments for breast cancer?

Treatments for breast cancer include:

  • Surgery such as
    • A mastectomy, which removes the whole breast
    • A lumpectomy to remove the cancer and some normal tissue around it, but not the breast itself
  • Radiation therapy
  • Chemotherapy
  • Hormone therapy, which blocks cancer cells from getting the hormones they need to grow
  • Targeted therapy, which uses drugs or other substances that attack specific cancer cells with less harm to normal cells
  • Immunotherapy

Can breast cancer be prevented?

You may be able to help prevent breast cancer by making healthy lifestyle changes such as:

  • Staying at a healthy weight
  • Limiting alcohol use
  • Getting enough exercisee
  • Limiting your exposure to estrogen by
    • Breastfeeding your babies if you can
    • Limiting hormone therapy

If you are at high risk, your health care provider may suggest that you take certain medicines to lower the risk. Some women at very high risk may decide to get a mastectomy (of their healthy breasts) to prevent breast cancer.

It's also important to get regular mammograms. They may be able to identify breast cancer in the early stages, when it is easier to treat.

NIH: National Cancer Institute


[Learn More in MedlinePlus]

Breast cancer

Breast cancer is a disease in which certain cells in the breast become abnormal and multiply uncontrollably to form a tumor. Although breast cancer is much more common in women, this form of cancer can also develop in men. In both women and men, the most common form of breast cancer begins in cells lining the milk ducts (ductal cancer). In women, cancer can also develop in the glands that produce milk (lobular cancer). Most men have little or no lobular tissue, so lobular cancer in men is very rare.

In its early stages, breast cancer usually does not cause pain and may exhibit no noticeable symptoms. As the cancer progresses, signs and symptoms can include a lump or thickening in or near the breast; a change in the size or shape of the breast; nipple discharge, tenderness, or retraction (turning inward); and skin irritation, dimpling, redness, or scaliness. However, these changes can occur as part of many different conditions. Having one or more of these symptoms does not mean that a person definitely has breast cancer.

In some cases, cancerous cells can invade surrounding breast tissue. In these cases, the condition is known as invasive breast cancer. Sometimes, tumors spread to other parts of the body. If breast cancer spreads, cancerous cells most often appear in the bones, liver, lungs, or brain. Tumors that begin at one site and then spread to other areas of the body are called metastatic cancers.

A small percentage of all breast cancers cluster in families. These cancers are described as hereditary and are associated with inherited gene mutations. Hereditary breast cancers tend to develop earlier in life than noninherited (sporadic) cases, and new (primary) tumors are more likely to develop in both breasts.


[Learn More in MedlinePlus]

Breast Cancer-Patient Version

Learn about breast cancer risk factors, symptoms, tests to diagnose, factors affecting prognosis, staging, and treatment.
[Learn More in MedlinePlus]

Breast Cancer Summary

Learn about breast cancer risk factors, symptoms, tests to diagnose, factors affecting prognosis, staging, and treatment.
[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.