C50

Classification

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Coding Guidance

C50 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

connective tissue of breast
Paget's disease of breast
Paget's disease of nipple

Includes

From C00-D49

Excludes 1

C50

skin of breast

Use Additional Code

C50

code to identify estrogen, and other hormones and factors receptor status

More Specific Codes

C50.0

Malignant neoplasm of nipple and areola

C50.1

Malignant neoplasm of central portion of breast

C50.2

Malignant neoplasm of upper-inner quadrant of breast

C50.3

Malignant neoplasm of lower-inner quadrant of breast

C50.4

Malignant neoplasm of upper-outer quadrant of breast

C50.5

Malignant neoplasm of lower-outer quadrant of breast

C50.6

Malignant neoplasm of axillary tail of breast

C50.8

Malignant neoplasm of overlapping sites of breast

C50.9

Malignant neoplasm of breast of unspecified site

External Resources

2025 ICD-10 guidelines from CMS.gov