DRG 601
Medical DRGNon-Malignant Breast Disorders without CC/MCC
What is MS-DRG 601?
MS-DRG 601 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 09 (MDC 09) without a significant Complication or Comorbidity. It maps to 91 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.6050 with a geometric mean length of stay of 2.3 days and an arithmetic mean of 2.6 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
| DRG | Title | Rel. Weight | GMLOS |
|---|---|---|---|
| 600 | Non-Malignant Breast Disorders with CC/MCC | 1.0416 | 3.2 days |
| 601 | Non-Malignant Breast Disorders without CC/MCCThis page | 0.6050 | 2.3 days |
Linked ICD-10-CM Diagnosis Mappings
- D49.3
Neoplasm of unspecified behavior of breast
BillableChapter 2 - I97.2
Postmastectomy lymphedema syndrome
BillableChapter 9 - N60.01
Solitary cyst of right breast
BillableChapter 14 - N60.02
Solitary cyst of left breast
BillableChapter 14 - N60.09
Solitary cyst of unspecified breast
BillableChapter 14 - N60.11
Diffuse cystic mastopathy of right breast
BillableChapter 14 - N60.12
Diffuse cystic mastopathy of left breast
BillableChapter 14 - N60.19
Diffuse cystic mastopathy of unspecified breast
BillableChapter 14 - N60.21
Fibroadenosis of right breast
BillableChapter 14 - N60.22
Fibroadenosis of left breast
BillableChapter 14 - N60.29
Fibroadenosis of unspecified breast
BillableChapter 14 - N60.31
Fibrosclerosis of right breast
BillableChapter 14 - N60.32
Fibrosclerosis of left breast
BillableChapter 14 - N60.39
Fibrosclerosis of unspecified breast
BillableChapter 14 - N60.41
Mammary duct ectasia of right breast
BillableChapter 14 - N60.42
Mammary duct ectasia of left breast
BillableChapter 14 - N60.49
Mammary duct ectasia of unspecified breast
BillableChapter 14 - N60.81
Other benign mammary dysplasias of right breast
BillableChapter 14 - N60.82
Other benign mammary dysplasias of left breast
BillableChapter 14 - N60.89
Other benign mammary dysplasias of unspecified breast
BillableChapter 14 - N60.91
Unspecified benign mammary dysplasia of right breast
BillableChapter 14 - N60.92
Unspecified benign mammary dysplasia of left breast
BillableChapter 14 - N60.99
Unspecified benign mammary dysplasia of unspecified breast
BillableChapter 14 - N61.0
Mastitis without abscess
BillableChapter 14 - N61.1
Abscess of the breast and nipple
BillableChapter 14 - N61.20
Granulomatous mastitis, unspecified breast
BillableChapter 14 - N61.21
Granulomatous mastitis, right breast
BillableChapter 14 - N61.22
Granulomatous mastitis, left breast
BillableChapter 14 - N61.23
Granulomatous mastitis, bilateral breast
BillableChapter 14 - N62
Hypertrophy of breast
BillableChapter 14 - N63.0
Unspecified lump in unspecified breast
BillableChapter 14 - N63.10
Unspecified lump in the right breast, unspecified quadrant
BillableChapter 14 - N63.11
Unspecified lump in the right breast, upper outer quadrant
BillableChapter 14 - N63.12
Unspecified lump in the right breast, upper inner quadrant
BillableChapter 14 - N63.13
Unspecified lump in the right breast, lower outer quadrant
BillableChapter 14 - N63.14
Unspecified lump in the right breast, lower inner quadrant
BillableChapter 14 - N63.15
Unspecified lump in the right breast, overlapping quadrants
BillableChapter 14 - N63.20
Unspecified lump in the left breast, unspecified quadrant
BillableChapter 14 - N63.21
Unspecified lump in the left breast, upper outer quadrant
BillableChapter 14 - N63.22
Unspecified lump in the left breast, upper inner quadrant
BillableChapter 14 - N63.23
Unspecified lump in the left breast, lower outer quadrant
BillableChapter 14 - N63.24
Unspecified lump in the left breast, lower inner quadrant
BillableChapter 14 - N63.25
Unspecified lump in the left breast, overlapping quadrants
BillableChapter 14 - N63.31
Unspecified lump in axillary tail of the right breast
BillableChapter 14 - N63.32
Unspecified lump in axillary tail of the left breast
BillableChapter 14 - N63.41
Unspecified lump in right breast, subareolar
BillableChapter 14 - N63.42
Unspecified lump in left breast, subareolar
BillableChapter 14 - N64.0
Fissure and fistula of nipple
BillableChapter 14 - N64.1
Fat necrosis of breast
BillableChapter 14 - N64.2
Atrophy of breast
BillableChapter 14 - N64.3
Galactorrhea not associated with childbirth
BillableChapter 14 - N64.4
Mastodynia
BillableChapter 14 - N64.51
Induration of breast
BillableChapter 14 - N64.52
Nipple discharge
BillableChapter 14 - N64.53
Retraction of nipple
BillableChapter 14 - N64.59
Other signs and symptoms in breast
BillableChapter 14 - N64.81
Ptosis of breast
BillableChapter 14 - N64.82
Hypoplasia of breast
BillableChapter 14 - N64.89
Other specified disorders of breast
BillableChapter 14 - N64.9
Disorder of breast, unspecified
BillableChapter 14 - N65.0
Deformity of reconstructed breast
BillableChapter 14 - N65.1
Disproportion of reconstructed breast
BillableChapter 14 - Q83.0
Congenital absence of breast with absent nipple
BillableChapter 17 - Q83.1
Accessory breast
BillableChapter 17 - Q83.2
Absent nipple
BillableChapter 17 - Q83.3
Accessory nipple
BillableChapter 17 - Q83.8
Other congenital malformations of breast
BillableChapter 17 - Q83.9
Congenital malformation of breast, unspecified
BillableChapter 17 - R92.0
Mammographic microcalcification found on diagnostic imaging of breast
BillableChapter 18 - R92.1
Mammographic calcification found on diagnostic imaging of breast
BillableChapter 18 - R92.2
Inconclusive mammogram
BillableChapter 18 - R92.30
Dense breasts, unspecified
BillableChapter 18 - R92.311
Mammographic fatty tissue density, right breast
BillableChapter 18 - R92.312
Mammographic fatty tissue density, left breast
BillableChapter 18 - R92.313
Mammographic fatty tissue density, bilateral breasts
BillableChapter 18 - R92.321
Mammographic fibroglandular density, right breast
BillableChapter 18 - R92.322
Mammographic fibroglandular density, left breast
BillableChapter 18 - R92.323
Mammographic fibroglandular density, bilateral breasts
BillableChapter 18 - R92.331
Mammographic heterogeneous density, right breast
BillableChapter 18 - R92.332
Mammographic heterogeneous density, left breast
BillableChapter 18 - R92.333
Mammographic heterogeneous density, bilateral breasts
BillableChapter 18 - R92.341
Mammographic extreme density, right breast
BillableChapter 18 - R92.342
Mammographic extreme density, left breast
BillableChapter 18 - R92.343
Mammographic extreme density, bilateral breasts
BillableChapter 18 - R92.8
Other abnormal and inconclusive findings on diagnostic imaging of breast
BillableChapter 18 - T85.41XA
Breakdown (mechanical) of breast prosthesis and implant, initial encounter
BillableChapter 19 - T85.42XA
Displacement of breast prosthesis and implant, initial encounter
BillableChapter 19 - T85.43XA
Leakage of breast prosthesis and implant, initial encounter
BillableChapter 19 - T85.44XA
Capsular contracture of breast implant, initial encounter
BillableChapter 19 - T85.49XA
Other mechanical complication of breast prosthesis and implant, initial encounter
BillableChapter 19 - Z40.01
Encounter for prophylactic removal of breast
BillableChapter 21
