What are Right Breast Mass ICD-10-CM Codes?
A right breast mass refers to an abnormal lump, swelling, or growth detected in the right breast. This mass can be benign (non-cancerous, such as fibroadenomas or cysts) or malignant (as in breast cancer or other malignant neoplasms). Precise ICD-10-CM coding ensures accurate documentation, diagnosis, and billing, helping clinicians determine the nature and severity of the condition, especially when supported by diagnostic imaging such as mammograms or ultrasounds.
In 2025, ICD-10 includes specific codes based on laterality (right or left breast), quadrant location (e.g., upper outer quadrant, lower inner quadrant), and the clinical nature of the finding (unspecified lump, inconclusive findings, etc.). This helps distinguish between a lump in the right breast, unspecified breast, or a mass in the left breast, aiding both diagnosis and management.
Below are the most current and commonly used ICD-10 codes for right breast mass cases, including detailed quadrant-level distinctions:
- N63.10 – Unspecified lump in right breast, unspecified quadrant
Used when a lump in the right breast is detected, but the specific quadrant is not documented. - N63.11 – Unspecified lump in right breast, upper outer quadrant
Applies to masses located in the upper outer quadrant, a region where breast cancer is most commonly detected. - N63.12 – Unspecified lump in right breast, upper inner quadrant
Used when the mass is found in the upper inner quadrant of the right breast. - N63.13 – Unspecified lump in right breast, lower outer quadrant
Code for a lump identified in the lower outer quadrant, near the axillary tail. - N63.14 – Unspecified lump in right breast, lower inner quadrant
Used when the mass is located in the lower inner quadrant of the right breast. - R92.1 – Mammographic microcalcification found on diagnostic imaging of right breast
Used when mammography identifies microcalcifications, which may suggest early malignancy. - R92.3 – Inconclusive mammogram of right breast
Indicates that mammographic results are inconclusive, requiring additional follow-up to determine the nature of the findings. - R92.8 – Other abnormal and inconclusive findings on diagnostic imaging of right breast
Used when imaging reveals abnormal findings not specifically classified elsewhere. - R93.1 – Abnormal findings on diagnostic imaging of right breast
Covers general abnormalities noted during imaging that require further investigation.