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45378Endoscopy

Diagnostic colonoscopy

Prior authorization
Not commonly required

What this is, in plain language

A camera exam of the entire large intestine, done with sedation, to evaluate symptoms or follow up on prior findings.

Why a clinician orders it

Bleeding, change in bowel habits, abdominal pain, anemia, follow-up of polyps, or surveillance after prior cancer.

Medical necessity — what insurers usually look at

Screening colonoscopies (separate G/CPT codes) are covered as preventive without cost-share under ACA. Diagnostic colonoscopies — done for symptoms — usually do not need prior authorization but may apply to your deductible.

Documentation to ask about

  • Reason for the exam
  • Prior colonoscopy results, if any
  • Family history of colon cancer or polyps

Questions for your provider

  • ?Is this being billed as screening or diagnostic? How does that affect what I pay?
  • ?Is the facility and the anesthesia provider in my network?

Why this code is in our seed set

One of the highest-volume endoscopy codes nationally; included in the CMS Top 200 Ranked by Services.

Validated against

  • CMS Top 200 Level I CPT Codes Ranked by Services
  • USPSTF 2021 Recommendation, Colorectal Cancer Screening
  • ASGE colonoscopy guidance

Terms you'll see

Medical NecessityRead more →

The insurer is reviewing whether the service is clinically appropriate for your situation.

Important: AuraCode is an educational tool. It does not provide medical, legal, or insurance advice, claims decisions, or approval guarantees. Final coverage depends on your specific plan, eligibility, diagnosis, submitted documentation, and your insurer's review.