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PAYER POLICY CHANGES

33866 Insurance Policy Changes

CPT 33866, in plain terms, covers Add-on for replacing the underside of the aortic arch (hemiarch) with a graft, reported with the primary ascending aorta procedure. CPT 33866 is referenced in 1 tracked payer policy change from Blue Cross & Blue Shield of Mississippi. For billers and coders, staying current on payer-specific coverage criteria, reimbursement rules, and prior-authorization requirements for CPT 33866 is critical to clean claim submission. Each entry below links to the full policy analysis with effective dates and action steps.

Official descriptor: CPT 33866 on AAPC

Watch 33866

Get one email when a payer policy names 33866, a payer adds or drops it from a prior auth list, or Medicare changes its NCCI pairs, unit limit, payment or coverage articles.

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REFERENCE DATA

Payers with rules3
Payers requiring prior auth3
  • CountyCare Health Plan · Effective April 23, 2026

    Prior authorization required in some cases

    CountyCare Prior Authorization Look-Up Tool (All Codes)

  • CalViva Health · Effective December 31, 2025

    Prior authorization required

    CalViva Health CMS-0057-F prior authorization requirements

  • Community Health Plan of Imperial Valley · Effective December 31, 2025

    Prior authorization required

    Community Health Plan of Imperial Valley CMS-0057-F prior authorization requirements

FREQUENTLY ASKED QUESTIONS

Does CalViva Health require prior authorization for 33866?

CalViva Health lists 33866 on CalViva Health CMS-0057-F prior authorization requirements for medicaid managed plans (list dated December 31, 2025). Verify with the payer before scheduling.

Does Community Health Plan of Imperial Valley require prior authorization for 33866?

Community Health Plan of Imperial Valley lists 33866 on Community Health Plan of Imperial Valley CMS-0057-F prior authorization requirements for medicaid managed plans (list dated December 31, 2025). Verify with the payer before scheduling.

Does CountyCare Health Plan require prior authorization for 33866?

CountyCare Health Plan lists 33866 on CountyCare Prior Authorization Look-Up Tool (All Codes) for medicaid managed plans, with conditions (list dated April 23, 2026). Verify with the payer before scheduling.

What insurance policy changes affect CPT 33866?

There are 1 tracked policy change affecting CPT 33866, including updates from Blue Cross & Blue Shield of Mississippi. Each change may modify coverage criteria, reimbursement rates, or prior-authorization requirements.

Which payers have updated policy for CPT 33866?

Payers that have issued tracked updates for CPT 33866 include: Blue Cross & Blue Shield of Mississippi.

How do I get notified when CPT 33866 policy changes?

Create a free account at PolicyChanges.app and save a search filtered to CPT 33866. You will get an email when new policy changes reference this code: daily or weekly, your choice, on every plan.

Why do payers change policies for CPT 33866?

Payers revise policies for individual billing codes to align with updated clinical guidelines, CMS rule changes, fraud and abuse prevention measures, or network cost-management goals. Changes can affect medical necessity criteria, place-of-service restrictions, bundling rules, or whether a code requires prior authorization.

See every payer rule for 33866

Prior authorization lists, coverage criteria, NCCI edits and Medicare coverage articles for 33866 in one place.

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