C50Not billable, use a more specific code below
Malignant neoplasm of breast
chapter 2: Neoplasms
57 billable codes under C50: none are a CC or MCC; all map to HCC 23 (Prostate, Breast, and Other Cancers and Tumors).An HCC counts toward a Medicare Advantage patient's risk score.
Advertisements
Instructional notes
Includes: conditions that are coded here
- connective tissue of breast
- Paget's disease of breast
- Paget's disease of nipple
Use additional code: add a second code for this, listed after this one
- code to identify estrogen, and other hormones and factors receptor status (Z17.-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.
- Admission/Encounter for treatment of primary site (page 33)
- Admission/Encounter for treatment of secondary site (page 33)
- Coding and sequencing of complications (page 34)
- Primary malignancy previously excised (page 34)
- Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
- Admission/encounter to determine extent of malignancy (page 36)
- Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
- Admission/encounter for pain control/management (page 36)
All codes under C50
C50 can't be used on a claim. Pick a billable code below; grey headings group them.
- C50.0Malignant neoplasm of nipple and areola
- C50.01Malignant neoplasm of nipple and areola, female
- C50.011Malignant neoplasm of nipple and areola, right female breast
- C50.012Malignant neoplasm of nipple and areola, left female breast
- C50.019Malignant neoplasm of nipple and areola, unspecified female breast
- C50.02Malignant neoplasm of nipple and areola, male
- C50.021Malignant neoplasm of nipple and areola, right male breast
- C50.022Malignant neoplasm of nipple and areola, left male breast
- C50.029Malignant neoplasm of nipple and areola, unspecified male breast
- C50.1Malignant neoplasm of central portion of breast
- C50.11Malignant neoplasm of central portion of breast, female
- C50.111Malignant neoplasm of central portion of right female breast
- C50.112Malignant neoplasm of central portion of left female breast
- C50.119Malignant neoplasm of central portion of unspecified female breast
- C50.12Malignant neoplasm of central portion of breast, male
- C50.121Malignant neoplasm of central portion of right male breast
- C50.122Malignant neoplasm of central portion of left male breast
- C50.129Malignant neoplasm of central portion of unspecified male breast
- C50.2Malignant neoplasm of upper-inner quadrant of breast
- C50.21Malignant neoplasm of upper-inner quadrant of breast, female
- C50.211Malignant neoplasm of upper-inner quadrant of right female breast
- C50.212Malignant neoplasm of upper-inner quadrant of left female breast
- C50.219Malignant neoplasm of upper-inner quadrant of unspecified female breast
- C50.22Malignant neoplasm of upper-inner quadrant of breast, male
- C50.221Malignant neoplasm of upper-inner quadrant of right male breast
- C50.222Malignant neoplasm of upper-inner quadrant of left male breast
- C50.229Malignant neoplasm of upper-inner quadrant of unspecified male breast
- C50.3Malignant neoplasm of lower-inner quadrant of breast
- C50.31Malignant neoplasm of lower-inner quadrant of breast, female
- C50.311Malignant neoplasm of lower-inner quadrant of right female breast
- C50.312Malignant neoplasm of lower-inner quadrant of left female breast
- C50.319Malignant neoplasm of lower-inner quadrant of unspecified female breast
- C50.32Malignant neoplasm of lower-inner quadrant of breast, male
- C50.321Malignant neoplasm of lower-inner quadrant of right male breast
- C50.322Malignant neoplasm of lower-inner quadrant of left male breast
- C50.329Malignant neoplasm of lower-inner quadrant of unspecified male breast
- C50.4Malignant neoplasm of upper-outer quadrant of breast
- C50.41Malignant neoplasm of upper-outer quadrant of breast, female
- C50.411Malignant neoplasm of upper-outer quadrant of right female breast
- C50.412Malignant neoplasm of upper-outer quadrant of left female breast
- C50.419Malignant neoplasm of upper-outer quadrant of unspecified female breast
- C50.42Malignant neoplasm of upper-outer quadrant of breast, male
- C50.421Malignant neoplasm of upper-outer quadrant of right male breast
- C50.422Malignant neoplasm of upper-outer quadrant of left male breast
- C50.429Malignant neoplasm of upper-outer quadrant of unspecified male breast
- C50.5Malignant neoplasm of lower-outer quadrant of breast
- C50.51Malignant neoplasm of lower-outer quadrant of breast, female
- C50.511Malignant neoplasm of lower-outer quadrant of right female breast
- C50.512Malignant neoplasm of lower-outer quadrant of left female breast
- C50.519Malignant neoplasm of lower-outer quadrant of unspecified female breast
- C50.52Malignant neoplasm of lower-outer quadrant of breast, male
- C50.521Malignant neoplasm of lower-outer quadrant of right male breast
- C50.522Malignant neoplasm of lower-outer quadrant of left male breast
- C50.529Malignant neoplasm of lower-outer quadrant of unspecified male breast
- C50.6Malignant neoplasm of axillary tail of breast
- C50.61Malignant neoplasm of axillary tail of breast, female
- C50.611Malignant neoplasm of axillary tail of right female breast
- C50.612Malignant neoplasm of axillary tail of left female breast
- C50.619Malignant neoplasm of axillary tail of unspecified female breast
- C50.62Malignant neoplasm of axillary tail of breast, male
- C50.621Malignant neoplasm of axillary tail of right male breast
- C50.622Malignant neoplasm of axillary tail of left male breast
- C50.629Malignant neoplasm of axillary tail of unspecified male breast
- C50.8Malignant neoplasm of overlapping sites of breast
- C50.81Malignant neoplasm of overlapping sites of breast, female
- C50.811Malignant neoplasm of overlapping sites of right female breast
- C50.812Malignant neoplasm of overlapping sites of left female breast
- C50.819Malignant neoplasm of overlapping sites of unspecified female breast
- C50.82Malignant neoplasm of overlapping sites of breast, male
- C50.821Malignant neoplasm of overlapping sites of right male breast
- C50.822Malignant neoplasm of overlapping sites of left male breast
- C50.829Malignant neoplasm of overlapping sites of unspecified male breast
- C50.9Malignant neoplasm of breast of unspecified site
- C50.91Malignant neoplasm of breast of unspecified site, female
- C50.911Malignant neoplasm of unspecified site of right female breast
- C50.912Malignant neoplasm of unspecified site of left female breast
- C50.919Malignant neoplasm of unspecified site of unspecified female breast
- C50.92Malignant neoplasm of breast of unspecified site, male
- C50.921Malignant neoplasm of unspecified site of right male breast
- C50.922Malignant neoplasm of unspecified site of left male breast
- C50.929Malignant neoplasm of unspecified site of unspecified male breast
- C50.AMalignant inflammatory neoplasm of breast
- C50.A0Malignant inflammatory neoplasm of unspecified breast
- C50.A1Malignant inflammatory neoplasm of right breast
- C50.A2Malignant inflammatory neoplasm of left breast
C50 MS-DRGs
As the principal diagnosis, all 57 billable codes under C50 group to MS-DRG 582, 583, 597, 598, or 599 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Other codes that refer to C50
Notes on these codes point to C50.
- C49 Excludes1: malignant neoplasm of connective tissue of breast (C50.-)
- C49.3 Excludes1: malignant neoplasm of breast (C50.-)
- D05 Excludes1: malignant neoplasm of breast (C50.-)
- D05 Excludes1: Paget's disease of breast or nipple (C50.-)
- D61.82 Code Also: malignant neoplasm of breast (C50.-)
- D75.81 Code First: malignant neoplasm of breast (C50.-)
- Z17 Code First: malignant neoplasm of breast (C50.-)
- Z79.81 Code First: malignant neoplasm of breast (C50.-)
- Z80.3 Includes: Conditions classifiable to C50.-
- Z85.3 Includes: Conditions classifiable to C50.-
- Z91.B Code Also: conditions classifiable to C50.-
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor.
Read more about breast cancer on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.