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    v1.0.28
    OpenPayerBilling CodesDiseases and Disorders of the Circulatory SystemDRG 303-atherosclerosis-without-mcc
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    Atherosclerosis without MCC: Inpatient Reimbursement Overview

    DRG 303 addresses inpatient stays for atherosclerosis without Major Complication or Comorbidity, focusing on cases with lower clinical complexity. This grouping matters for inpatient reimbursement because it determines prospective Medicare payment levels tied to expected resource use.

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    DRG 303 Overview

    DRG 303 covers hospital admissions for atherosclerosis without Major Complication or Comorbidity. It includes patients treated for atherosclerotic disease who do not have higher-severity comorbid conditions that would escalate the Diagnosis-Related Group. This classification affects Medicare payment by grouping cases of similar resource use and clinical severity for prospective inpatient reimbursement. Understanding the scope of DRG 303 supports accurate coding and hospital case mix reporting.

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    Clinical Trials

    • Trials evaluating medical therapy optimization for stable atherosclerosis: randomized or pragmatic studies comparing intensive risk-factor management strategies (lipid-lowering intensity, blood pressure targets, antiplatelet strategies, and lifestyle interventions) in hospitalized patients with atherosclerotic disease but without major complications. These studies enroll adults admitted for symptomatic or incident atherosclerotic disease (eg, peripheral arterial disease, carotid stenosis, or coronary atherosclerosis without acute myocardial infarction) to test protocols that aim to reduce recurrent events and rehospitalizations. Findings inform inpatient discharge planning, secondary prevention bundles, and payer decisions about coverage for intensive pharmacologic or coordinated care programs.
    • Comparative effectiveness research on diagnostic and procedural decision-making: observational cohorts or pragmatic trials comparing outcomes and resource use for different diagnostic pathways and elective interventions (eg, noninvasive imaging strategies, timing and selection of revascularization versus conservative management) in patients identified with atherosclerosis without major complications. These studies focus on heterogenous inpatients who present with symptomatic ischemia or incidental atherosclerotic findings to determine which approaches lead to better functional outcomes, fewer readmissions, and lower overall costs. Results help clinicians and health systems refine care pathways and help payers evaluate appropriateness criteria and bundle payment structures for elective procedures.
    • Post-discharge outcomes and care coordination studies: prospective registries and implementation trials testing transitional care models, medication adherence programs, and remote monitoring for patients discharged after hospitalization for atherosclerosis without MCC. Research targets older adults and those with multimorbidity at high risk for recurrent vascular events or medication nonadherence, measuring readmission rates, event-free survival, quality of life, and health-care utilization. Evidence from these studies guides investment in discharge interventions, case management, and reimbursement policies aimed at reducing preventable readmissions and improving long-term outcomes.

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    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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