CPT® Code 62321

Injection(s), of diagnostic or therapeutic substance(s) (eg, anesthetic, antispasmodic, opioid, steroid, other solution), not including neurolytic substances, including needle or catheter placement, interlaminar epidural or subarachnoid, cervical or thoracic; with imaging guidance (ie, fluoroscopy or CT)

The procedure described by CPT® Code 62321 involves the injection of diagnostic or therapeutic substances into the spinal region, specifically targeting the epidural or subarachnoid spaces in the cervical or thoracic areas. This procedure is performed using imaging guidance, such as fluoroscopy or computed tomography (CT), to ensure accurate placement of the needle or catheter. Prior to the injection, the skin over the targeted area is thoroughly cleansed with an antiseptic solution, and a local anesthetic is administered to minimize discomfort during the procedure. A thin spinal needle or catheter is then carefully inserted into the epidural or subarachnoid space, typically through a paramedian or midline interlaminar approach. The epidural space is the outermost area of the spinal canal, filled with cerebrospinal fluid, and lies between the dura mater and the vertebral wall. In contrast, the subarachnoid space is located closer to the spinal cord, situated between the arachnoid and pia mater membranes. To confirm the correct placement of the needle, contrast dye may be injected, allowing for visualization of the medication's flow into the desired area. The substances injected can include anesthetics, antispasmodics, opioids, steroids, or other solutions, but do not include neurolytic substances. After the injection, the patient is monitored for any potential adverse effects, ensuring safety and efficacy of the procedure.