Answer: The appropriate code for this scenario is 64479 (Injection[s], anesthetic agent and/or steroid, transforaminal epidural, with imaging guidance [fluoroscopy or CT]; cervical or thoracic, single level).
Explanation: Although two areas of the spine were involved, you’re coding for a single spinal level injection. T12-L1 is one intervertebral level between the T12 and L1 vertebrae even though they are in two different spinal regions. CPT® also includes the following parenthetical note: “For transforaminal epidural injection at the T12-L1 level, use 64479.