Retrospective Review
Definition
Retrospective review is a utilization review conducted by an insurance payer after services have been delivered and the patient has been discharged. The payer examines whether the services met medical necessity criteria and whether the cost or length of stay was appropriate.
Why It Matters
Retrospective reviews can result in claim denials or payment reductions months after services are rendered. This creates unexpected revenue loss and accounting complications. Strong clinical documentation is your only defense against retrospective denials. Understanding what triggers retrospective review helps you focus on proper documentation.
How It Works
Payers conduct retrospective reviews on a sample of submitted claims. A payer may review claims from specific providers, specialties, or CPT codes considered high-risk. When a claim is selected for retrospective review, the payer requests clinical documentation from the provider. They examine the medical records to verify medical necessity, appropriateness of treatment, and accuracy of coding. If the payer determines services were not medically necessary, the claim is denied and payment may be demanded back. Retrospective denials are sometimes called retroactive denials. Providers have appeal rights and can respond with additional documentation to support medical necessity.
Related Terms
Can a payer deny a claim after initial approval through retrospective review?
Yes. Payers sometimes approve claims initially and then deny them later through retrospective review if they determine services were not medically necessary or were provided inappropriately. You may have to repay approved amounts. Appeal rights vary by payer and plan. Maintain documentation for at least 5-7 years to support appeals.
How often do retrospective reviews occur?
Payers conduct retrospective reviews on a sample of claims based on claims volume, specialty, and perceived risk. Some payers review a percentage of all claims; others target specific codes or providers with higher denial rates. The timing and frequency depend on payer practices and state regulations.
See How Altair Supports Retrospective Review Documentation
Altair flags high-risk claims and reminds you to maintain strong clinical documentation to defend against retrospective denials. See how it works.
This glossary is for informational purposes. Consult official billing guidelines and payer policies for definitive definitions. Last updated: 2026-04-06.