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MDC 25: Assignment of Diagnosis Codes

6 MS-DRGs (2 surgical, 4 medical) with FY2027 relative weights averaging 2.8163. Click any DRG for its weight history, CC/MCC family, grouper code lists and denial exposure.

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Data effective

MS-DRGs in MDC 25

Weights in this category range from 0.8120 (DRG 976) to 7.1740 (DRG 969); the change column compares FY2027 with FY2026.

MS-DRGs assigned to MDC 25 with FY2027 weights
DRGTitleTypeWeightGMLOSChange
969HIV with Extensive O.R. Procedures with MCCSurgical7.174012.2+17.2%
970HIV with Extensive O.R. Procedures without MCCSurgical3.14606.2+19.3%
974HIV with Major Related Condition with MCCMedical3.04906.7+5.7%
975HIV with Major Related Condition with CCMedical1.32503.9+2.3%
976HIV with Major Related Condition without CC/MCCMedical0.81202.8-10.1%
977HIV with or without Other Related ConditionMedical1.39203.8+7.2%

How to read this table

The relative weight is the payment multiplier CMS applies to a hospital's wage-adjusted standardized amount; a weight of 2.0 pays roughly twice an average inpatient case before outliers and add-ons. Geometric mean length of stay is the figure used in post-acute transfer calculations, so stays shorter than it in a transfer DRG are paid per diem. The change column compares the FY2027 final weight with FY2026; moves larger than two percent usually come from code reassignments in the final rule's Table 6 series or from updated cost data, and are worth re-checking in contract models and budgets before October 1. Surgical DRGs require a qualifying operating-room procedure; medical DRGs are reached when no such procedure is coded.

Frequently asked questions

How many MS-DRGs are in MDC 25?

6 MS-DRGs are assigned to MDC 25 (Assignment of Diagnosis Codes) in the FY2027 v44 grouper: 2 surgical and 4 medical.

Which MDC 25 DRG has the highest weight?

DRG 969, HIV with Extensive O.R. Procedures with MCC, carries the highest FY2027 relative weight in this category at 7.1740; the lowest is DRG 976 at 0.8120.

How is a stay assigned to this MDC?

The grouper maps the principal diagnosis to MDC 25, then checks for a qualifying operating-room procedure to choose between the surgical and medical DRG partitions, and finally applies CC/MCC severity splits.

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

Operational reference compiled from CMS publications. Relative weights are national factors; actual payment depends on hospital-specific rates and adjustments. Not legal, clinical or billing advice.