MS-DRG 311Medical
Angina Pectoris
Major Diagnostic Category 05·Grouped by diagnosis·FY 2027
MS-DRG 311 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 05 (MDC 05). It maps to 10 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 0.6684 with a geometric mean length of stay of 1.9 days and an arithmetic mean of 2.3 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
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FY 2027 payment data
From Table 5 of the FY 2027 IPPS Final Rule (CMS).
- Relative weight:
- 0.6684 (payment multiplier vs. the average case (1.0))
- Geometric mean stay:
- 1.9 days (used for transfer payments)
- Average stay:
- 2.3 days (arithmetic mean)
- Post-acute transfer policy:
- No (not subject to it)
Diagnosis codes (10)
As the principal diagnosis, these ICD-10-CM codes can group to DRG 311. 100% of the codes listed are billable.
- I20.0Unstable angina
- I20.1Angina pectoris with documented spasm
- I20.2Refractory angina pectoris
- I20.81Angina pectoris with coronary microvascular dysfunction
- I20.89Other forms of angina pectoris
- I20.9Angina pectoris, unspecified
- I24.0Acute coronary thrombosis not resulting in myocardial infarction
- I24.81Acute coronary microvascular dysfunction
- I24.89Other forms of acute ischemic heart disease
- I24.9Acute ischemic heart disease, unspecified