HCPCS in the procedure resource

How should I represent 1-n modifiers in the procedure resource, e.g. hcpcs codes?

Hey there. One suggestion is to add the specific FHIR resource you’re using to the question - I’m going to answer in the context of Explanation Of Benefit.

You might be mixing procedure with productOrService. My understanding is that procedure is meant to hold ICD-10 procedure codes appearing on UB-04 claim forms (institutional).

The item will hold your individual claim line level hcpcs code (item.productOrService). Then, the same item includes modifier which is an array of varying length, so you could include 0 to as many modifiers as needed in item.modifier[*].

Hope that helps!