All ICD10 Codes

DRG 311

Medical DRG

Angina Pectoris

TypeMedicalMDC05Dx Codes10

What is MS-DRG 311?

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 2026 it carries a relative weight of 0.7019 with a geometric mean length of stay of 1.9 days and an arithmetic mean of 2.4 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

Classification
Medical DRG
Diagnosis-driven grouping
MDC
Major Diagnostic Category 05
Linked Codes
10 diagnosis
Billable Dx
100%
10 of 10 shown

FY 2026 Payment Data

Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).

Relative Weight
0.7019
Payment multiplier vs. average case (1.0)
Geometric Mean LOS
1.9 days
Used for transfer payment calculations
Arithmetic Mean LOS
2.4 days
Average length of stay
Post-Acute Transfer
No
Not subject to the transfer policy

Linked ICD-10-CM Diagnosis Mappings

  • I20.0

    Unstable angina

    BillableChapter 9
  • I20.1

    Angina pectoris with documented spasm

    BillableChapter 9
  • I20.2

    Refractory angina pectoris

    BillableChapter 9
  • I20.81

    Angina pectoris with coronary microvascular dysfunction

    BillableChapter 9
  • I20.89

    Other forms of angina pectoris

    BillableChapter 9
  • I20.9

    Angina pectoris, unspecified

    BillableChapter 9
  • I24.0

    Acute coronary thrombosis not resulting in myocardial infarction

    BillableChapter 9
  • I24.81

    Acute coronary microvascular dysfunction

    BillableChapter 9
  • I24.89

    Other forms of acute ischemic heart disease

    BillableChapter 9
  • I24.9

    Acute ischemic heart disease, unspecified

    BillableChapter 9