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    v1.0.28
    OpenPayerBilling CodesDiseases and Disorders of the Nervous SystemDRG 084-traumatic-stupor-and-coma-1-hour-without-cc-mcc
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    Traumatic Stupor and Coma >1 Hour without CC/MCC: Inpatient Reimbursement Overview

    DRG 084 addresses traumatic stupor and coma lasting more than one hour when no Major Complication or Comorbidity or Complication or Comorbidity is present. This Diagnosis-Related Group defines the inpatient resource grouping used by Medicare to set payment for acute traumatic brain injury admissions, so precise documentation and coding influence reimbursement.

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    DRG 084 Overview

    DRG 084 covers patients admitted with traumatic stupor and coma lasting more than one hour without presence of a Major Complication or Comorbidity or Complication or Comorbidity. This Diagnosis-Related Group captures moderate-to-severe traumatic brain injury cases where only the primary neurologic insult is coded without accompanying high-severity comorbid conditions. It is important for Medicare payment because it groups inpatient resource use and determines base reimbursement for these acute neurologic trauma admissions. Accurate clinical documentation and coding of the coma duration and absence of qualifying comorbidities directly affect classification into this Diagnosis-Related Group.

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    Clinical Trials

    • Acute neuroprotective intervention trials: randomized controlled studies testing early pharmacologic or supportive interventions administered in the emergency department or intensive care unit within hours of traumatic brain injury to reduce secondary brain injury. These trials enroll adults with traumatic stupor or prolonged coma (>1 hour) without major complicating comorbidities (no CC/MCC) to evaluate short-term neurologic recovery, intracranial pressure trajectories, and in-hospital complication rates. Such research is directly relevant to providers and payers because interventions that shorten ICU stays, reduce complications (for example, ventilator days or infections), or improve early neurologic recovery can alter inpatient resource use and DRG-associated costs.
    • Comparative effectiveness and pathway studies of acute critical care management: pragmatic trials or observational studies comparing different ICU care bundles, monitoring strategies (invasive vs. noninvasive intracranial pressure monitoring), timing of imaging, or protocols for sedation and ventilator management in patients with traumatic stupor/coma. These studies typically enroll heterogeneous adult trauma patients within the DRG to determine which standard-of-care approaches lead to fewer in-hospital adverse events, lower length of stay, and better discharge disposition. Findings inform clinicians and payers about which care pathways deliver equivalent or superior outcomes for similar cost and can guide pathway implementation and reimbursement policies.
    • Post-acute outcomes and rehabilitation effectiveness studies: longitudinal cohort studies and randomized trials focused on inpatient-to-post-acute transitions, timing/intensity of inpatient rehabilitation initiation, and predictors of functional recovery and readmissions among survivors of traumatic stupor/coma. These studies follow patients from hospital discharge through 6–12 months to measure functional status, need for institutional care, and healthcare utilization. Results are important for discharge planning, for structuring bundled payments and case management, and for payers to estimate long-term costs and benefits associated with different inpatient and post-discharge care strategies.

    Related Codes

    020-INTRACRANIAL-VASCULAR-PROCEDURES-WITH-PRINCIPAL-DIAGNOSIS-HEMORRHAGE-WITH-MCC

    Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage with MCC: Inpatient Reimbursement Overview

    021-INTRACRANIAL-VASCULAR-PROCEDURES-WITH-PRINCIPAL-DIAGNOSIS-HEMORRHAGE-WITH-CC

    Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage with CC: Inpatient Reimbursement Overview

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    Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage without CC/MCC: Inpatient Reimbursement Overview

    023-CRANIOTOMY-WITH-MAJOR-DEVICE-IMPLANT-OR-ACUTE-COMPLEX-CNS-PRINCIPAL-DIAGNOSIS-WITH-MCC-OR-ANTINEOPLASTIC-IMPLANT-OR-EPILEPSY-WITH-NEUROSTIMULATOR

    Craniotomy with Major Device Implant or Complex CNS DRG 023: Inpatient Reimbursement Overview

    024-CRANIOTOMY-WITH-MAJOR-DEVICE-IMPLANT-OR-ACUTE-COMPLEX-CNS-PRINCIPAL-DIAGNOSIS-WITHOUT-MCC

    Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC: Inpatient Reimbursement Overview

    025-CRANIOTOMY-AND-ENDOVASCULAR-INTRACRANIAL-PROCEDURES-WITH-MCC

    Craniotomy and Endovascular Intracranial Procedures with MCC: Inpatient Reimbursement Overview

    026-CRANIOTOMY-AND-ENDOVASCULAR-INTRACRANIAL-PROCEDURES-WITH-CC

    Craniotomy and Endovascular Intracranial Procedures with CC: Inpatient Reimbursement Overview

    027-CRANIOTOMY-AND-ENDOVASCULAR-INTRACRANIAL-PROCEDURES-WITHOUT-CC-MCC

    Craniotomy and Endovascular Intracranial Procedures without CC/MCC: Inpatient Reimbursement Overview

    028-SPINAL-PROCEDURES-WITH-MCC

    Spinal Procedures with MCC: Inpatient Reimbursement Overview

    029-SPINAL-PROCEDURES-WITH-CC-OR-SPINAL-NEUROSTIMULATORS

    Spinal Procedures with CC or Spinal Neurostimulators: 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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