MS-DRG · FY 2026 v43.0

MS-DRG 313 – Chest Pain

A Medical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Inpatient cases group to DRG 313 when the ICD-10-CM principal diagnosis is one of the 4 codes listed below. Its FY 2026 relative weight is 0.7200 with a geometric mean length of stay of 1.7 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.7200
Relative Weight
1.7
Geometric Mean LOS (days)
2.1
Arithmetic Mean LOS (days)
4
Principal Diagnosis Codes
How a case is assigned to DRG 313

The grouper first assigns the case to MDC 05 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here).

ICD-10-CM

Principal Diagnosis Codes 4 codes · 1 category

R07 Pain in throat and chest4 codes
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 313 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 313?

MS-DRG 313 (Chest Pain) is a medical DRG in MDC 05 (Diseases & Disorders of the Circulatory System). Its FY 2026 relative weight is 0.7200 with a geometric mean length of stay of 1.7 days.

How many diagnosis codes group to DRG 313?

4 ICD-10-CM principal diagnosis codes group to this DRG, spanning 1 three-character category.

What is the relative weight of DRG 313?

The FY 2026 relative weight of this DRG is 0.7200, meaning reimbursement of roughly 0.72 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.