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    v1.0.30
    OpenPayerBilling CodesInfectious and Parasitic Diseases, Systemic or Unspecified SitesDRG 863-postoperative-and-post-traumatic-infections-without-mcc
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    Postoperative and Post-Traumatic Infections without MCC: Inpatient Reimbursement Overview

    DRG 863 captures inpatient admissions for postoperative and post-traumatic infections that do not involve a Major Complication or Comorbidity, encompassing surgical site and wound infections requiring hospital care. It matters for inpatient reimbursement because the Diagnosis-Related Group assignment drives prospective Medicare payment and reflects expected resource use for these cases.

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    DRG 863 Overview

    DRG 863 covers inpatient stays for postoperative and post-traumatic infections without a Major Complication or Comorbidity. It includes patients treated for surgical site infections or wound infections that require inpatient management but lack higher-severity comorbid conditions. This Diagnosis-Related Group matters for Medicare payment because it groups similar resource use and determines the prospective payment for these inpatient encounters. Accurate coding of the infection and absence of a Major Complication or Comorbidity affects reimbursement and case-mix assignment.

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    Clinical Trials

    • Acute perioperative antimicrobial strategy trials: randomized or pragmatic studies comparing dosing strategies, timing, or routes of perioperative and early postoperative antimicrobials for patients who develop or are at high risk for postoperative and post‑traumatic infections. These trials enroll hospitalized surgical patients (including general, orthopedic, and trauma surgery populations) in the immediate postoperative period to evaluate infection clearance, time to clinical stabilization, and incidence of complications such as sepsis or wound dehiscence. Results inform inpatient antibiotic stewardship, length-of-stay expectations, and resource utilization that directly affect hospital reimbursement and case-mix management for this DRG.
    • Comparative effectiveness studies of source-control and wound-management approaches: observational cohorts or pragmatic trials comparing surgical drainage techniques, negative-pressure wound therapy, or timing of reoperation for patients with established postoperative or post‑traumatic infections. These studies typically target heterogeneous inpatient groups with infected surgical sites (superficial, deep incisional, or organ/space infections) to determine which procedural strategies reduce re‑intervention rates, ICU transfers, and readmissions. Findings are relevant to providers and payers because optimal source control can shorten inpatient LOS, reduce downstream costs, and influence DRG-related quality metrics and penalty exposure.
    • Post-discharge outcomes and readmission prevention studies: prospective observational studies and interventional trials testing discharge pathways, home IV antibiotic programs, telehealth wound monitoring, or early outpatient follow-up to reduce 30‑day readmissions and complications among patients discharged after treatment for postoperative or post‑traumatic infections. These studies enroll patients recently discharged from the index hospitalization across surgical specialties to measure readmission rates, emergency visits, and functional recovery. For payers and hospitals, effective post-discharge strategies can lower avoidable readmissions, improve bundled-payment performance, and clarify which transitions-of-care interventions are cost-effective for this DRG.

    Related Codes

    853-INFECTIOUS-AND-PARASITIC-DISEASES-WITH-O-R-PROCEDURES-WITH-MCC

    Infectious and Parasitic Diseases with O.R. Procedures with MCC: Inpatient Reimbursement Overview

    854-INFECTIOUS-AND-PARASITIC-DISEASES-WITH-O-R-PROCEDURES-WITH-CC

    Infectious and Parasitic Diseases with O.R. Procedures with CC: Inpatient Reimbursement Overview

    855-INFECTIOUS-AND-PARASITIC-DISEASES-WITH-O-R-PROCEDURES-WITHOUT-CC-MCC

    Infectious and Parasitic Diseases with O.R. Procedures without CC/MCC: Inpatient Reimbursement Overview

    856-POSTOPERATIVE-OR-POST-TRAUMATIC-INFECTIONS-WITH-O-R-PROCEDURES-WITH-MCC

    Postoperative or Post-Traumatic Infections with O.R. Procedures with MCC: Inpatient Reimbursement Overview

    857-POSTOPERATIVE-OR-POST-TRAUMATIC-INFECTIONS-WITH-O-R-PROCEDURES-WITH-CC

    Postoperative or Post-Traumatic Infections with O.R. Procedures with CC: Inpatient Reimbursement Overview

    858-POSTOPERATIVE-OR-POST-TRAUMATIC-INFECTIONS-WITH-O-R-PROCEDURES-WITHOUT-CC-MCC

    Postoperative or Post-Traumatic Infections with O.R. Procedures without CC/MCC: Inpatient Reimbursement Overview

    862-POSTOPERATIVE-AND-POST-TRAUMATIC-INFECTIONS-WITH-MCC

    Postoperative and Post-Traumatic Infections with MCC: Inpatient Reimbursement Overview

    864-FEVER-AND-INFLAMMATORY-CONDITIONS

    Fever and Inflammatory Conditions: Inpatient Reimbursement Overview

    865-VIRAL-ILLNESS-WITH-MCC

    Viral Illness with MCC: Inpatient Reimbursement Overview

    866-VIRAL-ILLNESS-WITHOUT-MCC

    Viral Illness without MCC: Inpatient Reimbursement Overview

    Showing 1–10 of 16

    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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