DRGs group patients with similar clinical patterns into payment categories. Insurers and payers use them to normalize reimbursements across hospitals and facilities.
The grouping affects claim edits, pre-payment review, and expected severity scoring because reimbursement is tied to assigned group rather than every procedure individually.
Claims mechanics
Correct DRG assignment depends on coding and discharge documentation. Errors in coding can trigger denials, retrospective recoupments, or under/overpayments.
Example
Two policyholders are both hospitalized for heart failure. If one is coded into a more severe DRG than allowed by medical record, the insurer may later recoup the overpayment after audit.