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    v1.0.28
    OpenPayerBilling CodesDiseases and Disorders of the Circulatory SystemDRG 311-angina-pectoris
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    Angina Pectoris: Inpatient Reimbursement Overview

    DRG 311 addresses inpatient admissions for angina pectoris and the related diagnostic and medical management during hospitalization. Proper assignment of this Diagnosis-Related Group is important for Medicare payment because it influences the prospective bundled reimbursement tied to diagnosis, documented complications, and resource utilization.

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    DRG 311 Overview

    DRG 311 covers hospital admissions primarily for angina pectoris, including unstable and rest angina presentations that require inpatient evaluation and management. This Diagnosis-Related Group groups cases by clinical severity and resource use related to ischemic chest pain without major procedures. It matters for Medicare inpatient payment because the assigned Diagnosis-Related Group determines the prospective bundled payment amount based on diagnosis, comorbidities, and length of stay. Accurate coding and documentation of angina and any Complication or Comorbidity or Major Complication or Comorbidity affect reimbursement and case classification.

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    Clinical Trials

    • Trials of short-term pharmacologic strategies to relieve acute ischemic chest pain in hospitalized patients: these studies evaluate the safety and efficacy of different antianginal medication regimens, routes (e.g., intravenous versus sublingual), and timing of administration for patients admitted with unstable angina or acute exacerbations of chronic angina. The patient population typically includes adults presenting with chest pain without myocardial infarction but at risk for progression, and the research question addresses rapid symptom control and prevention of in-hospital adverse events. Results inform inpatient protocols, length of stay, and resource utilization, which are directly relevant to clinicians managing acute care pathways and to payers monitoring costs of admissions classified under this DRG.
    • Comparative effectiveness studies of invasive versus conservative early management strategies for high-risk angina patients: these trials compare outcomes of early invasive evaluation (e.g., coronary angiography with possible revascularization) versus optimized medical therapy and selective invasive follow-up for patients with unstable or crescendo angina. The population includes patients stratified by ischemic risk, comorbidities, and noninvasive testing results, and the research objective is to determine which approach reduces subsequent myocardial infarction, readmissions, and mortality. Findings impact decisions about utilization of diagnostic procedures, timing of interventions, and downstream costs—critical for hospitals coding under this DRG and for payers assessing value of early invasive care.
    • Post-discharge secondary prevention and care-coordination trials focused on reducing readmissions and recurrent angina: these studies test interventions such as structured outpatient follow-up, medication adherence programs, cardiac rehabilitation referral uptake, and remote monitoring for patients discharged after an admission for angina. The patient cohort includes survivors of inpatient admissions for angina with varying adherence risks and comorbid conditions; the primary outcomes are readmission rates, recurrent angina episodes, functional status, and adherence to guideline-directed preventive therapies. This research is important to providers and payers because effective post-discharge programs can lower readmissions, improve long-term outcomes, and reduce total cost of care associated with this DRG.

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    213-ENDOVASCULAR-ABDOMINAL-AORTA-WITH-ILIAC-BRANCH-PROCEDURES

    Endovascular Abdominal Aorta with Iliac Branch Procedures: Inpatient Reimbursement Overview

    215-OTHER-HEART-ASSIST-SYSTEM-IMPLANT

    Other Heart Assist System Implant: Inpatient Reimbursement Overview

    216-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITH-CARDIAC-CATHETERIZATION-WITH-MCC

    Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with MCC: Inpatient Reimbursement Overview

    217-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITH-CARDIAC-CATHETERIZATION-WITH-CC

    Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with CC: Inpatient Reimbursement Overview

    218-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITH-CARDIAC-CATHETERIZATION-WITHOUT-CC-MCC

    Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization without CC/MCC: Inpatient Reimbursement Overview

    219-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITHOUT-CARDIAC-CATHETERIZATION-WITH-MCC

    Cardiac Valve and Other Major Cardiothoracic Procedures with MCC: Inpatient Reimbursement Overview

    220-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITHOUT-CARDIAC-CATHETERIZATION-WITH-CC

    Cardiac Valve and Other Major Cardiothoracic Procedures without Cardiac Catheterization with CC: Inpatient Reimbursement Overview

    221-CARDIAC-VALVE-AND-OTHER-MAJOR-CARDIOTHORACIC-PROCEDURES-WITHOUT-CARDIAC-CATHETERIZATION-WITHOUT-CC-MCC

    Cardiac Valve and Other Major Cardiothoracic Procedures without Cardiac Catheterization without CC/MCC: Inpatient Reimbursement Overview

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    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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