Diagnosis Related Group (DRG) Codes

DRG Codes (Diagnosis Related Group)

Diagnosis-related group (DRG) is a system to classify hospital cases into one of approximately 500 groups, also referred to as DRGs, expected to have similar hospital resource use. They have been used in the United States since 1983. There is more than one DRG system being used in the United States, but only the MS-DRG (CMS-DRG) system is used by Medicare. FindACode uses the MS-DRG system as it relates to the Medicare Inpatient Prospective Payment System (IPPS).


The IPPS is a complex calculation in which begins with each case being categorized into a diagnosis-related group (DRG). Each DRG has a payment weight assigned to it. Payment weights are affected by factors such as: DRGs are assigned by a "grouper" program which gathers claim information based on ICD diagnoses, procedures, age, sex, discharge status and the presence of complications or comorbidities. All these factors are used to determine the appropriate DRG on a case by case basis.

sources  wikipedia, cms.hhs.gov, Instacode Institute

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