All ICD10 Codes

C50

Non-Billable
ChapterC00–D49
Rankcategory
Official Description

Malignant neoplasm of breast

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Includes
  • connective tissue of breast
  • Paget's disease of breast
  • Paget's disease of nipple
Excludes1(Not coded here)
Use Additional Code
  • code to identify estrogen, and other hormones and factors receptor status (Z17.-)

Clinical Hierarchy

CH2Neoplasms (C00-D49)
C50Malignant neoplasm of breast
C50.0Malignant neoplasm of nipple and areola
C50.1Malignant neoplasm of central portion of breast
C50.2Malignant neoplasm of upper-inner quadrant of breast
C50.3Malignant neoplasm of lower-inner quadrant of breast
C50.4Malignant neoplasm of upper-outer quadrant of breast
C50.5Malignant neoplasm of lower-outer quadrant of breast
C50.6Malignant neoplasm of axillary tail of breast
C50.8Malignant neoplasm of overlapping sites of breast
C50.9Malignant neoplasm of breast of unspecified site
C50.AMalignant inflammatory neoplasm of breast

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to C50. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Adenocarcinoma14 unique routes
duct(2 variants)
infiltrating(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
infiltrating duct(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
inflammatory(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
intraductal(4 variants)
noninfiltrating(2 variants)
papillary(2 variants)
with invasion(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
papillary(2 variants)
with invasion(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
lobular(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
papillary(2 variants)
intraductal (noninfiltrating)(2 variants)
with invasion(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
Cancer1 unique routes
breast→C50
Carcinoma (malignant)10 unique routes
duct (cell)(4 variants)
infiltrating(4 variants)
specified site(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
with lobular carcinoma (in situ)(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
ductal(2 variants)
with lobular(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
ductular, infiltrating(2 variants)
unspecified site (female)→C50(2 variants)
male→C50
infiltrating(2 variants)
duct(2 variants)
unspecified site (female)→C50(2 variants)
male→C50

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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