NCCI Code Pair Checker
Enter two CPT or HCPCS codes to see whether our CMS reference dataset lists them as an NCCI edit pair. This is a code-pair reference tool, not a personalized claim review.
Try these common edit pairs
Click any pair below to auto-fill the checker:
What is code bundling?
When you have a medical procedure, it often includes smaller steps. For example, a colonoscopy with a biopsy already includes the basic colonoscopy — they shouldn't be listed as two separate charges. The government maintains a list of these code pairs (called NCCI edits) to prevent double-billing.
If two codes on your bill appear in this list, it means one procedure typically includes the other. Being charged for both could be an error worth questioning.
Can there be exceptions?
Sometimes, yes. For each code pair, the government specifies whether exceptions are possible:
- No exceptions: These procedures always overlap. There is no situation where both should appear as separate charges on the same visit.
- Exceptions possible: In rare cases — like when procedures were done on different body parts or during separate visits on the same day — billing both may be appropriate. But the provider needs documentation to support it.
Why this matters for your bill
Bundling errors (charging separately for procedures that should be included together) are one of the most common medical billing mistakes. If you find a flagged pair on your bill, ask your provider to explain why they were billed separately. For a full walkthrough, see our 5-step medical bill checking guide. Bundling errors are especially common in ER bills, colonoscopy bills, and childbirth hospital bills.
Need code descriptions or Medicare reference rates?
Use the CPT/HCPCS lookup to confirm a code, view a short description, and see Medicare rates when our packaged data includes them.
Open CPT/HCPCS LookupAbout our data
This tool checks against 1,820,507 NCCI PTP edit pairs loaded from CMS quarterly data releases. CMS updates these edits four times per year.
A matching pair means the codes appear together in the CMS reference table. It does not, by itself, prove that a specific claim was billed incorrectly.