Summary & Overview
Inborn and Other Disorders of Metabolism: Inpatient Reimbursement Overview
DRG 642 encompasses inborn errors of metabolism and other metabolic disorders requiring inpatient care; it captures complex diagnostic and treatment needs. This Diagnosis-Related Group matters for inpatient reimbursement because it groups cases with higher resource intensity and specialized services, influencing Medicare payment rates.
DRG 642 Overview
DRG 642 covers hospital admissions for inborn errors of metabolism and other metabolic disorders that require significant inpatient evaluation or treatment, including enzyme deficiencies, amino acid and organic acid disorders, and acute metabolic decompensation. These conditions often involve complex diagnostic testing, specialized medical management, and sometimes intensive care, which can drive resource use. For Medicare payment, grouping under this Diagnosis-Related Group affects average payment relative to other medical DRGs because of the typically higher cost and specialized services involved. Accurate coding of principal diagnosis and any Complication or Comorbidity or Major Complication or Comorbidity is important to ensure appropriate assignment.