Which option correctly identifies the use of unlisted codes for reporting procedures?

• A. They report procedures lacking a CPT code in Category I or Category III
• B. They report all medications
• C. They report only diagnostic tests
• D. They report facility charges

Answer: (A)

Unlisted procedure codes are used when a procedure or service has no exact CPT code in Category I or Category III. They provide a way to report new or uncommon procedures by using a general “unlisted” code in the appropriate section and attaching detailed documentation about what was done. Because there isn’t a specific CPT match, this unlisted code signals to the payer that additional description is necessary for proper reimbursement.

Medications are billed with HCPCS Level II or drug codes, not unlisted CPT procedures. Diagnostic tests are typically reported with the specific CPT codes for those tests, not with an unlisted procedure code. Facility charges are handled separately on the facility claim and aren’t reported using unlisted CPT procedure codes.