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Duplicate concepts

When working with claims data from US - the LT and RT modifiers are in OMOP vocab twice.

under CPT4

under HCPCS

Make the first non-standard and map it to the second.

Addition: OMG! All modifiers are in Athena twice!!!


We’re planning to clean them up.

Letter ones are from HCPCS, digits are CPT ones.
What about the mixtures?