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    v1.0.28
    OpenPayerBilling CodesDiseases and Disorders of the Musculoskeletal System and Connective TissueDRG 554-bone-diseases-and-arthropathies-without-mcc
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    Bone Diseases and Arthropathies without MCC: Inpatient Reimbursement Overview

    DRG 554 encompasses hospitalizations for bone diseases and arthropathies without Major Complication or Comorbidity, focusing on less complex musculoskeletal admissions. It matters for inpatient reimbursement because Diagnosis-Related Group assignment determines the bundled Medicare payment reflecting expected resource use for these lower-acuity cases.

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    DRG 554 Overview

    DRG 554 covers hospital stays for adult patients with primary diagnoses of bone diseases and arthropathies without a Major Complication or Comorbidity, typically including noncomplicated fractures, osteoarthritis, inflammatory joint disorders, and other musculoskeletal conditions managed medically or with straightforward surgical intervention. This Diagnosis-Related Group groups cases with similar clinical resource use and lower expected resource intensity, affecting Medicare payment by assigning a bundled inpatient reimbursement rate that reflects typical costs for these less complex presentations. Accurate coding of principal diagnosis and any comorbid conditions is essential because the presence or absence of Complication or Comorbidity or Major Complication or Comorbidity determines assignment to higher- or lower-paying Diagnosis-Related Groups. Length of stay and billed services within the inpatient encounter influence final reimbursement under the Medicare inpatient prospective payment framework.

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    Clinical Trials

    • Acute management interventional trials evaluating perioperative protocols for patients hospitalized with acute bone disease flares or surgical indications (for example, studies testing optimized analgesia, perioperative infection prevention bundles, or accelerated mobilization pathways). These trials focus on inpatients with severe arthropathies or bone infections who require urgent medical or surgical care, aiming to reduce length of stay, complication rates, and need for intensive care support. Findings are directly relevant to hospitals and payers because improved acute protocols can lower complication-driven resource use and readmissions that drive higher reimbursement and costs under this DRG.
    • Comparative effectiveness studies of inpatient medical regimens for inflammatory or metabolic bone disorders, comparing different disease-modifying approaches, dosing strategies, or adjunctive therapies in hospitalized patients. These studies enroll adults admitted for exacerbations of conditions such as severe inflammatory arthropathies, osteomyelitis requiring IV therapy, or metabolic bone disease complications, assessing outcomes such as time to clinical stabilization, need for surgical intervention, and inpatient resource utilization. Evidence from these trials helps clinicians choose therapies that may shorten inpatient duration or avert costly procedures, informing utilization management and payer coverage decisions.
    • Post-discharge outcomes and care-transition research examining rehabilitation intensity, outpatient follow-up models, and monitoring strategies for patients discharged after treatment for bone diseases and arthropathies. These observational cohorts or pragmatic trials target patients recently discharged after medical or surgical hospitalization to evaluate impacts on functional recovery, readmission rates, and downstream costs over 30–180 days. Results are important to providers and payers because effective discharge planning and targeted outpatient interventions can reduce readmissions and long-term costs associated with this DRG while improving patient function and quality of life.

    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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