ICD-10-CM Codes
C00-D49 Neoplasms
C50-C50 Malignant neoplasms of breast
C50- Malignant neoplasm of breast

2018/2019 ICD-10-CM Diagnosis Code C50.422

Malignant neoplasm of upper-outer quadrant of left male breast

2016

2017

2018

2019

Billable/Specific Code

Male Dx

C50.422 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Short description: Malig neoplasm of upper-outer quadrant of left male breast
The 2018/2019 edition of ICD-10-CM C50.422 became effective on October 1, 2018.
This is the American ICD-10-CM version of C50.422 - other international versions of ICD-10 C50.422 may differ.

ICD-10-CM Coding Rules

C50.422 is applicable to male patients.

The following code(s) above C50.422 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to C50.422:

C00-D49
2019 ICD-10-CM Range C00-D49
Neoplasms
Note
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Neoplasms
C50
ICD-10-CM Diagnosis Code C50
Malignant neoplasm of breast
Includes
- connective tissue of breast
- Paget's disease of breast
- Paget's disease of nipple
Type 1 Excludes
- skin of breast (C44.501, C44.511, C44.521, C44.591)
Use Additional
- code to identify estrogen receptor status (Z17.0, Z17.1)
Malignant neoplasm of breast

Approximate Synonyms

Cancer, male breast, left upper-outer quadrant
Primary malignant neoplasm of upper outer quadrant of left male breast

ICD-10-CM C50.422 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):

582 Mastectomy for malignancy with cc/mcc
583 Mastectomy for malignancy without cc/mcc
597 Malignant breast disorders with mcc
598 Malignant breast disorders with cc
599 Malignant breast disorders without cc/mcc
600 Non-malignant breast disorders with cc/mcc
601 Non-malignant breast disorders without cc/mcc

Convert C50.422 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change

ICD-10-CM Codes Adjacent To C50.422

C50.321 Malignant neoplasm of lower-inner quadrant of right male breast

C50.322 Malignant neoplasm of lower-inner quadrant of left male breast

C50.329 Malignant neoplasm of lower-inner quadrant of unspecified male breast

C50.4 Malignant neoplasm of upper-outer quadrant of breast

C50.41 Malignant neoplasm of upper-outer quadrant of breast, female

C50.411 Malignant neoplasm of upper-outer quadrant of right female breast

C50.412 Malignant neoplasm of upper-outer quadrant of left female breast

C50.419 Malignant neoplasm of upper-outer quadrant of unspecified female breast

C50.42 Malignant neoplasm of upper-outer quadrant of breast, male

C50.421 Malignant neoplasm of upper-outer quadrant of right male breast

C50.422 Malignant neoplasm of upper-outer quadrant of left male breast

C50.429 Malignant neoplasm of upper-outer quadrant of unspecified male breast

C50.5 Malignant neoplasm of lower-outer quadrant of breast

C50.51 Malignant neoplasm of lower-outer quadrant of breast, female

C50.511 Malignant neoplasm of lower-outer quadrant of right female breast

C50.512 Malignant neoplasm of lower-outer quadrant of left female breast

C50.519 Malignant neoplasm of lower-outer quadrant of unspecified female breast

C50.52 Malignant neoplasm of lower-outer quadrant of breast, male

C50.521 Malignant neoplasm of lower-outer quadrant of right male breast

C50.522 Malignant neoplasm of lower-outer quadrant of left male breast

C50.529 Malignant neoplasm of lower-outer quadrant of unspecified male breast

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2018/2019 ICD-10-CM Diagnosis Code C50.422

Malignant neoplasm of upper-outer quadrant of left male breast

Neoplasms

Malignant neoplasm of breast