What does medical service code 62311 cpt stand for?

Answer 1

62311 refers back to code 62310: in its entirety, the code would read as follows:

Injection, single (not via indwelling catheter), not including neurolytic substances, with or without contrast (for either localization or epidurography), of diagnostic or therapeutic substance(s) (including anesthetic, antispasmodic, opioid, steroid, other solution), epidural or subarachnoid; cervical or thoracic; lumbar, sacral (caudal).

In bold is where the 62311 comes in; the entire first portion is 62310. 62311 includes all of 62310 as well as it's own portion in bold. All of this is directly from the CPT manual 2011.