Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes C00-D49 – Neoplasms (C00-D49) > 2024 ICD-10-CM Codes C50-C50 – Malignant neoplasms of breast (C50) > 2024 ICD-10-CM Codes C50 – Malignant neoplasm of breast (C50) > 2024 ICD-10-CM Codes C50.3 – Malignant neoplasm of lower-inner quadrant of breast (C50.3)