MS-DRG · FY 2026 v43.0
MS-DRG 876 – O.R. Procedures with Principal Diagnosis of Mental Illness
A Surgical DRG in MDC 19 (Mental Diseases & Disorders). Its FY 2026 relative weight is 3.8649 with a geometric mean length of stay of 7.3 days.
Surgical DRG – assigned by operating-room procedure✓ Official CMS v43.0 dataset
3.8649
Relative Weight
7.3
Geometric Mean LOS (days)
19.3
Arithmetic Mean LOS (days)
How a case is assigned to DRG 876
The grouper first assigns the case to MDC 19 from the principal diagnosis, then matches a qualifying operating-room procedure from the ICD-10-PCS list below (this is a Surgical DRG).
ICD-10-PCS
Procedure Codes
Procedure codes do not drive assignment for this DRG.
ICD-10-CM
Qualifying Diagnosis Codes
Diagnosis codes do not drive assignment for this DRG. Cases group here from the ICD-10-PCS procedure list below.
Frequently Asked Questions
What is MS-DRG 876?
MS-DRG 876 (O.R. Procedures with Principal Diagnosis of Mental Illness) is a surgical DRG in MDC 19 (Mental Diseases & Disorders). Its FY 2026 relative weight is 3.8649 with a geometric mean length of stay of 7.3 days.
What is the relative weight of DRG 876?
The FY 2026 relative weight of this DRG is 3.8649, meaning reimbursement of roughly 3.86 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.
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Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.
