| N6121 | Granulomatous mastitis, right breast |
| N6122 | Granulomatous mastitis, left breast |
| N6123 | Granulomatous mastitis, bilateral breast |
| N62 | Hypertrophy of breast |
| N63 | Unspecified lump in breast |
| N630 | Unspecified lump in unspecified breast |
| N631 | Unspecified lump in the right breast |
| N6310 | Unspecified lump in the right breast, unspecified quadrant |
| N6311 | Unspecified lump in the right breast, upper outer quadrant |
| N6312 | Unspecified lump in the right breast, upper inner quadrant |
| N6313 | Unspecified lump in the right breast, lower outer quadrant |
| N6314 | Unspecified lump in the right breast, lower inner quadrant |
| N6315 | Unspecified lump in the right breast, overlapping quadrants |
| N632 | Unspecified lump in the left breast |
| N6320 | Unspecified lump in the left breast, unspecified quadrant |
| N6321 | Unspecified lump in the left breast, upper outer quadrant |
| N6322 | Unspecified lump in the left breast, upper inner quadrant |
| N6323 | Unspecified lump in the left breast, lower outer quadrant |
| N6324 | Unspecified lump in the left breast, lower inner quadrant |
| N6325 | Unspecified lump in the left breast, overlapping quadrants |
| N633 | Unspecified lump in axillary tail |
| N6331 | Unspecified lump in axillary tail of the right breast |
| N6332 | Unspecified lump in axillary tail of the left breast |
| N634 | Unspecified lump in breast, subareolar |
| N6341 | Unspecified lump in right breast, subareolar |
| N6342 | Unspecified lump in left breast, subareolar |
| N64 | Other disorders of breast |
| N640 | Fissure and fistula of nipple |
| N641 | Fat necrosis of breast |
| N642 | Atrophy of breast |
| N643 | Galactorrhea not associated with childbirth |
| N644 | Mastodynia |
| N645 | Other signs and symptoms in breast |
| N6451 | Induration of breast |
| N6452 | Nipple discharge |
| N6453 | Retraction of nipple |
| N6459 | Other signs and symptoms in breast |
| N648 | Other specified disorders of breast |
| N6481 | Ptosis of breast |
| N6482 | Hypoplasia of breast |
| N6489 | Other specified disorders of breast |
| N649 | Disorder of breast, unspecified |
| N65 | Deformity and disproportion of reconstructed breast |
| N650 | Deformity of reconstructed breast |
| N651 | Disproportion of reconstructed breast |
| N70 | Salpingitis and oophoritis |
| N700 | Acute salpingitis and oophoritis |
| N7001 | Acute salpingitis |
| N7002 | Acute oophoritis |
| N7003 | Acute salpingitis and oophoritis |