ICD-10 · PDGM grouping
N60-N65 — Disorders of breast
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
Codes in range
60
No clinical group
10
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
27 of the 60 codes in N60-N65 group to MMTA - Other, but the range is not uniform — it spreads across 3 clinical groups. A further 10 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in N60-N65
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
Every code in N60-N65
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| N6001 | Solitary cyst of right breast | J | Can lead a claim |
| N6002 | Solitary cyst of left breast | J | Can lead a claim |
| N6009 | Solitary cyst of unspecified breast | None | Cannot lead a claim |
| N6011 | Diffuse cystic mastopathy of right breast | J | Can lead a claim |
| N6012 | Diffuse cystic mastopathy of left breast | J | Can lead a claim |
| N6019 | Diffuse cystic mastopathy of unspecified breast | None | Cannot lead a claim |
| N6021 | Fibroadenosis of right breast | A | Can lead a claim |
| N6022 | Fibroadenosis of left breast | A | Can lead a claim |
| N6029 | Fibroadenosis of unspecified breast | None | Cannot lead a claim |
| N6031 | Fibrosclerosis of right breast | A | Can lead a claim |
| N6032 | Fibrosclerosis of left breast | A | Can lead a claim |
| N6039 | Fibrosclerosis of unspecified breast | None | Cannot lead a claim |
| N6041 | Mammary duct ectasia of right breast | J | Can lead a claim |
| N6042 | Mammary duct ectasia of left breast | A | Can lead a claim |
| N6049 | Mammary duct ectasia of unspecified breast | None | Cannot lead a claim |
| N6081 | Other benign mammary dysplasias of right breast | J | Can lead a claim |
| N6082 | Other benign mammary dysplasias of left breast | J | Can lead a claim |
| N6089 | Other benign mammary dysplasias of unspecified breast | None | Cannot lead a claim |
| N6091 | Unspecified benign mammary dysplasia of right breast | J | Can lead a claim |
| N6092 | Unspecified benign mammary dysplasia of left breast | J | Can lead a claim |
| N6099 | Unspecified benign mammary dysplasia of unspecified breast | None | Cannot lead a claim |
| N610 | Mastitis without abscess | J | Can lead a claim |
| N611 | Abscess of the breast and nipple | C | Can lead a claim |
| N6120 | Granulomatous mastitis, unspecified breast | None | Cannot lead a claim |
| N6121 | Granulomatous mastitis, right breast | A | Can lead a claim |
| N6122 | Granulomatous mastitis, left breast | A | Can lead a claim |
| N6123 | Granulomatous mastitis, bilateral breast | A | Can lead a claim |
| N62 | Hypertrophy of breast | J | Can lead a claim |
| N630 | Unspecified lump in unspecified breast | None | Cannot lead a claim |
| N6310 | Unspecified lump in the right breast, unspecified quadrant | A | Can lead a claim |
| N6311 | Unspecified lump in the right breast, upper outer quadrant | A | Can lead a claim |
| N6312 | Unspecified lump in the right breast, upper inner quadrant | A | Can lead a claim |
| N6313 | Unspecified lump in the right breast, lower outer quadrant | A | Can lead a claim |
| N6314 | Unspecified lump in the right breast, lower inner quadrant | A | Can lead a claim |
| N6315 | Unspecified lump in the right breast, overlapping quadrants | A | Can lead a claim |
| N6320 | Unspecified lump in the left breast, unspecified quadrant | A | Can lead a claim |
| N6321 | Unspecified lump in the left breast, upper outer quadrant | A | Can lead a claim |
| N6322 | Unspecified lump in the left breast, upper inner quadrant | A | Can lead a claim |
| N6323 | Unspecified lump in the left breast, lower outer quadrant | A | Can lead a claim |
| N6324 | Unspecified lump in the left breast, lower inner quadrant | A | Can lead a claim |
| N6325 | Unspecified lump in the left breast, overlapping quadrants | A | Can lead a claim |
| N6331 | Unspecified lump in axillary tail of the right breast | A | Can lead a claim |
| N6332 | Unspecified lump in axillary tail of the left breast | A | Can lead a claim |
| N6341 | Unspecified lump in right breast, subareolar | A | Can lead a claim |
| N6342 | Unspecified lump in left breast, subareolar | A | Can lead a claim |
| N640 | Fissure and fistula of nipple | C | Can lead a claim |
| N641 | Fat necrosis of breast | J | Can lead a claim, code first applies |
| N642 | Atrophy of breast | A | Can lead a claim |
| N643 | Galactorrhea not associated with childbirth | J | Can lead a claim |
| N644 | Mastodynia | J | Can lead a claim |
| N6451 | Induration of breast | J | Can lead a claim |
| N6452 | Nipple discharge | J | Can lead a claim |
| N6453 | Retraction of nipple | A | Can lead a claim |
| N6459 | Other signs and symptoms in breast | J | Can lead a claim |
| N6481 | Ptosis of breast | J | Can lead a claim |
| N6482 | Hypoplasia of breast | A | Can lead a claim |
| N6489 | Other specified disorders of breast | J | Can lead a claim |
| N649 | Disorder of breast, unspecified | None | Cannot lead a claim |
| N650 | Deformity of reconstructed breast | J | Can lead a claim |
| N651 | Disproportion of reconstructed breast | J | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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