Skip to main content
MS-DRG 475 · MDC 08 · Surgical

MS-DRG 475: Amputation for Musculoskeletal System and Connective Tissue Disorders with CC

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Data effective
Data currency: IPPS Table 5 FY2027 final rule (effective October 1, 2026); Definitions Manual v44 (effective October 1, 2026). Next CMS release: April 1, 2027 (v44.1 mid-year update), then the FY2028 final rule in August 2027.

Key facts for DRG 475

FY2027 relative weight
2.2250
Higher than 68% of all MS-DRGs
Change vs FY2026
-2.2%
FY2026 weight 2.2760
Geometric mean LOS
6.0 days
Arithmetic mean 7.4 days
MDC
08
Diseases and Disorders of the Musculoskeletal System and Connective Tissue
Severity level
with CC (complication or comorbidity)
Transfer policy
Post-acute transfer DRG

TL;DR

MS-DRG 475 is a surgical group in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue) at the middle severity level of its family. CMS assigns it a FY2027 relative weight of 2.2250 with a geometric mean length of stay of 6.0 days and an arithmetic mean of 7.4. Its weight moved down 2.2% from FY2026 (2.2760). That weight is higher than 68% of all surgical and medical MS-DRGs. Its CC/MCC family (DRG 474, DRG 476) spans weights 1.1350 to 4.2130. The v44 Definitions Manual assigns it through 81 operating room procedures codes.

What changed from FY2026 to FY2027

CMS recalibrates every MS-DRG weight annually from the prior year's MedPAR claims. For DRG 475 the FY2027 relative weight is 2.2250 against 2.2760 in FY2026, a fall of 2.24%, which exceeds the 2% threshold worth re-checking in contract models.

FY2026 versus FY2027 payment factors for MS-DRG 475
MetricFY2026FY2027Change
Relative weight2.27602.2250-0.0510
Geometric mean LOS (days)5.96.0+0.1
Arithmetic mean LOS (days)7.37.4+0.1
Weights shown are the FY2027 final values after the 10% cap on year-over-year reductions where applicable.

CC and MCC family

DRG 475 shares its base definition with 2 other MS-DRGs split by severity. The family's weights span 1.1350 to 4.2130, a 3.71× spread, which is the payment effect of documenting qualifying complications and comorbidities.

MS-DRGs in the same base group as DRG 475
DRGTitleFY2027 weightGMLOS
474Amputation for Musculoskeletal System and Connective Tissue Disorders with MCC or Insertion of Antibiotic-eluting Bone Void Filler4.21309.7
475Amputation for Musculoskeletal System and Connective Tissue Disorders with CC2.22506.0
476Amputation for Musculoskeletal System and Connective Tissue Disorders without CC/MCC1.13502.6

Grouper logic (v44 Definitions Manual)

Operating Room Procedures: 81 ICD-10 codes drive assignment to this group; the first 12 are shown.

Operating Room Procedures codes assigned to DRG 475 (sample)
ICD-10 codeDescription
0X600ZZDetachment at Right Forequarter, Open Approach
0X610ZZDetachment at Left Forequarter, Open Approach
0X620ZZDetachment at Right Shoulder Region, Open Approach
0X630ZZDetachment at Left Shoulder Region, Open Approach
0X680Z1Detachment at Right Upper Arm, High, Open Approach
0X680Z2Detachment at Right Upper Arm, Mid, Open Approach
0X680Z3Detachment at Right Upper Arm, Low, Open Approach
0X690Z1Detachment at Left Upper Arm, High, Open Approach
0X690Z2Detachment at Left Upper Arm, Mid, Open Approach
0X690Z3Detachment at Left Upper Arm, Low, Open Approach
0X6B0ZZDetachment at Right Elbow Region, Open Approach
0X6C0ZZDetachment at Left Elbow Region, Open Approach

Documentation and denial exposure

As a surgical DRG, assignment depends on a qualifying operating-room procedure being coded from the operative report; a missing or non-OR procedure code drops the stay into a medical DRG in MDC 08 with a lower weight. Because this family splits by severity, auditors target CC and MCC capture: each secondary diagnosis must be documented as present, monitored, evaluated or treated during the stay to survive a DRG-validation review. Typical inpatient denial codes for this group: CARC 16 (claim lacks information needed to group the stay), CARC 50 (the admission or procedure is judged not medically necessary), CARC 97 (a service is bundled into the DRG payment).

How QuickIntell uses DRG 475 data

QuickCode groups inpatient encounters against the current v44 logic, flags CC and MCC candidates that lack supporting documentation, and shows the weight difference across the family before the claim drops. QuickScribe captures the attending's language that supports severity, and QuickRCM works DRG-validation denials with the grouper evidence attached.

Explore QuickCodeExplore QuickScribeBook a demo

Frequently asked questions — DRG 475

What is MS-DRG 475?

MS-DRG 475 is "Amputation for Musculoskeletal System and Connective Tissue Disorders with CC", a surgical Medicare Severity Diagnosis-Related Group in MDC 08, Diseases and Disorders of the Musculoskeletal System and Connective Tissue. Medicare pays inpatient stays grouped here at the hospital's base rate multiplied by the DRG relative weight.

What is the FY2027 relative weight for DRG 475?

The FY2027 relative weight is 2.2250 (IPPS final rule Table 5, effective October 1, 2026). In FY2026 it was 2.2760, a change of -2.2%.

What is the average length of stay for DRG 475?

CMS reports a geometric mean length of stay of 6.0 days and an arithmetic mean of 7.4 days for FY2027. The geometric mean is used for transfer-payment calculations.

Which DRGs are in the same CC/MCC family as 475?

DRG 474 (Amputation for Musculoskeletal System and Connective Tissue Disorders with MCC or Insertion of Antibiotic-eluting Bone Void Filler, weight 4.2130); DRG 476 (Amputation for Musculoskeletal System and Connective Tissue Disorders without CC/MCC, weight 1.1350). The family's weights range from 1.1350 to 4.2130, so documented complications and comorbidities change payment materially.

What documentation supports the severity level of DRG 475?

DRG 475 is reached when the stay carries a secondary diagnosis from the CMS Complication or Comorbidity list but none from the MCC list. Common CC captures include chronic kidney disease stage 3 and above, uncontrolled diabetes with manifestations, malnutrition of specified severity and heart failure of a stated type. Each must be documented by the treating clinician and show clinical relevance in the record; a condition listed only in the problem list without assessment is the most frequent reason a CC is removed on audit and the stay drops to the base DRG.

Which codes group to DRG 475?

The v44 Definitions Manual lists 81 operating room procedures codes for this group. Examples from the operating room procedures list: 0X600ZZ (Detachment at Right Forequarter, Open Approach); 0X610ZZ (Detachment at Left Forequarter, Open Approach); 0X620ZZ (Detachment at Right Shoulder Region, Open Approach); 0X630ZZ (Detachment at Left Shoulder Region, Open Approach).

Is DRG 475 a post-acute transfer DRG?

Yes. CMS flags DRG 475 under the post-acute care transfer policy, so a discharge to a qualifying post-acute setting before the geometric mean length of stay is paid a per-diem amount rather than the full DRG payment.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-01. Verify against the primary file before billing or contracting decisions.

Disclaimer

This page is an operational reference compiled from the CMS IPPS FY2027 final rule (Table 5) and the v44 ICD-10 MS-DRG Definitions Manual. Relative weights are national factors; actual payment depends on each hospital's wage-adjusted base rate, add-ons, outliers and transfer adjustments. Nothing here is legal, clinical or billing advice; verify grouping against your encoder and the published CMS files.