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    v1.0.28
    OpenPayerBilling CodesDiseases and Disorders of the Musculoskeletal System and Connective TissueDRG 537-sprains-strains-and-dislocations-of-hip-pelvis-and-thigh-with-cc-mcc
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    Sprains, Strains, and Dislocations of Hip, Pelvis and Thigh with CC/MCC: Inpatient Reimbursement Overview

    DRG 537 covers sprains, strains, and dislocations of the hip, pelvis, and thigh when a Major Complication or Complication or Comorbidity is present; it defines the inpatient clinical scope and higher-severity resource use. This grouping matters for inpatient reimbursement because the presence of additional complications or comorbidities influences payment weight and hospital payment under Medicare.

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    DRG 537 Overview

    DRG 537 covers inpatient hospital admissions for sprains, strains, and dislocations of the hip, pelvis, and thigh when the record includes a Major Complication or Comorbidity or a Complication or Comorbidity. This Diagnosis-Related Group captures patients with these musculoskeletal injuries who have additional clinical complexity that increases resource use. It matters for Medicare payment because cases with higher severity classifications receive higher relative reimbursement to reflect increased inpatient resources and length of stay. Accurate coding of the primary injury and any Major Complication or Complication or Comorbidity is essential for correct payment assignment.

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    Clinical Trials

    • Acute surgical timing and perioperative pain control studies: Trials in this area focus on optimal timing of operative reduction or fixation for dislocations and severe strains/avulsion injuries of the hip, pelvis, and proximal thigh, and compare multimodal analgesia regimens (including regional blocks and opioid-sparing protocols) used in the immediate inpatient period. Patient populations are adults and older adults admitted emergently with hip/pelvic dislocations, closed pelvic ring injuries with associated muscle/tendon avulsions, or severe soft-tissue injuries classified with CC/MCC, where rapid stabilization and pain control affect morbidity. This research is relevant to providers who must balance operative urgency and anesthetic choices, and to payers because effective acute management can shorten length of stay, reduce complications, and influence resource use in high-cost inpatient DRG cases.
    • Comparative effectiveness of fixation versus nonoperative management in complex proximal thigh and pelvic soft-tissue injuries: These studies compare functional outcomes, readmission rates, and complication profiles between surgical repair/repair-plus-stabilization strategies and conservative management (immobilization/rehab) for patients with severe muscle/tendon avulsions and associated bony involvement that qualify as CC/MCC. Typical study cohorts include middle-aged to elderly patients whose comorbidities and injury patterns create equipoise about the benefits of surgery versus nonoperative care, with measurement of mobility, pain, and return-to-independence over months. Findings inform clinicians about which patients derive sufficient functional benefit to justify inpatient surgical resource use, and inform payers about downstream costs, rehospitalization risk, and long-term disability related to initial management choices within this DRG.
    • Post-discharge recovery, rehabilitation intensity, and readmission risk cohort studies: Observational and pragmatic trials examine how variations in inpatient rehabilitation initiation, discharge disposition (home with outpatient PT, home with home health, or skilled nursing facility), and early outpatient follow-up impact recovery trajectories, complication detection (e.g., heterotopic ossification, chronic pain), and 30- to 90-day readmission in patients with hip/pelvis/thigh sprains, strains, and dislocations coded with CC/MCC. These studies target older adults and medically complex patients whose inpatient complications or comorbidities (the CC/MCC qualifiers) increase risk of functional decline and rehospitalization, and they often use real-world outcomes and cost analyses. Results are directly applicable to case management and utilization review, helping providers optimize discharge planning and payers predict and reduce avoidable post-acute costs associated with this DRG.

    Related Codes

    402-SINGLE-LEVEL-COMBINED-ANTERIOR-AND-POSTERIOR-SPINAL-FUSION-EXCEPT-CERVICAL

    Single Level Combined Anterior and Posterior Spinal Fusion Except Cervical: Inpatient Reimbursement Overview

    426-MULTIPLE-LEVEL-COMBINED-ANTERIOR-AND-POSTERIOR-SPINAL-FUSION-EXCEPT-CERVICAL-WITH-MCC-OR-CUSTOM-MADE-ANATOMICALLY-DESIGNED-INTERBODY-FUSION-DEVICE

    Multiple Level Combined Anterior and Posterior Spinal Fusion Except Cervical with MCC or Custom-Made Anatomically Designed Interbody Fusion Device: Inpatient Reimbursement Overview

    427-MULTIPLE-LEVEL-COMBINED-ANTERIOR-AND-POSTERIOR-SPINAL-FUSION-EXCEPT-CERVICAL-WITH-CC

    Multiple Level Combined Anterior and Posterior Spinal Fusion Except Cervical with CC: Inpatient Reimbursement Overview

    428-MULTIPLE-LEVEL-COMBINED-ANTERIOR-AND-POSTERIOR-SPINAL-FUSION-EXCEPT-CERVICAL-WITHOUT-CC-MCC

    Multiple Level Combined Anterior and Posterior Spinal Fusion Except Cervical without CC/MCC: Inpatient Reimbursement Overview

    429-COMBINED-ANTERIOR-AND-POSTERIOR-CERVICAL-SPINAL-FUSION-WITH-MCC

    Combined Anterior and Posterior Cervical Spinal Fusion with MCC: Inpatient Reimbursement Overview

    430-COMBINED-ANTERIOR-AND-POSTERIOR-CERVICAL-SPINAL-FUSION-WITHOUT-MCC

    Combined Anterior and Posterior Cervical Spinal Fusion without MCC: Inpatient Reimbursement Overview

    447-MULTIPLE-LEVEL-SPINAL-FUSION-EXCEPT-CERVICAL-WITH-MCC-OR-CUSTOM-MADE-ANATOMICALLY-DESIGNED-INTERBODY-FUSION-DEVICE

    Multiple Level Spinal Fusion Except Cervical with MCC: Inpatient Reimbursement Overview

    448-MULTIPLE-LEVEL-SPINAL-FUSION-EXCEPT-CERVICAL-WITHOUT-MCC

    Multiple Level Spinal Fusion Except Cervical without MCC: Inpatient Reimbursement Overview

    450-SINGLE-LEVEL-SPINAL-FUSION-EXCEPT-CERVICAL-WITH-MCC-OR-CUSTOM-MADE-ANATOMICALLY-DESIGNED-INTERBODY-FUSION-DEVICE

    Single Level Spinal Fusion Except Cervical with MCC or Custom-Made Device: Inpatient Reimbursement Overview

    451-SINGLE-LEVEL-SPINAL-FUSION-EXCEPT-CERVICAL-WITHOUT-MCC

    Single Level Spinal Fusion Except Cervical without 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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