Are there a separate set of CPT4 and HCPCS procedure modifiers or is there one set of procedure modifiers that are applicable to both CPT4 and HCPCS codes? How has the vocabulary addressed this? My Googling comes up with
- Level I Modifiers: Normally known as CPT Modifiers and consists of two numeric digits and are updated annually by AMA American Medical Association.
- Level II Modifiers: Normally known as HCPCS Modifiers and consists of two digits (Alpha / Alphanumeric characters) in the sequence AA through VP. These modifiers are annually updated by CMS - Centres for Medicare and Medicaid Services
Vocabulary seems to have duplicated procedure modifiers in the CPT4 and HCPCS vocabularies. Can some describe how procedure modifiers should be applied and mapped?