Malignant neoplasm of other and unspecified sites of male breast

This code signifies the presence of a cancerous tumor originating in the male breast tissue, specifically when the primary site is not precisely documented or is located in an area other than the nipple or central portion. It indicates a malignant proliferation of cells within the male mammary gland.

Apply this code when documentation confirms a primary malignant neoplasm of the male breast, and the specific anatomical site within the breast is not further specified (e.g., "male breast cancer, NOS") or is described as "other sites." This code is appropriate when the physician's diagnosis explicitly states male breast cancer without further localization.

• Ensure the documentation clearly specifies "male breast" to differentiate from female breast neoplasms.
• If a more specific site within the male breast (e.g., nipple, central portion) is documented, a more precise ICD-9-CM code should be used.
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.