59 would not be appropriate at the same spinal level. Although 59 modifier might override the edit using the logic that they are different spinal levels for some instances some might bill. As seen below from the AMA CPT Network, they are stating they are both non-neurolytic epidurals in the same spinal region, they don't recommend reporting both codes during the same encounter is what I take from this response.
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Date: 06/22/2010
Surgery
Nervous System
Question
In which instances would it be appropriate to report codes 64483 and 62311 together?
Answer
Code 62311, 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; lumbar, sacral (caudal), describes epidural or subarachnoid injections of non-neurolytic substances including opioids, steroids, antispasmodic, and anesthetic substances, and does not differentiate between types of substances injected, but rather focuses on the route of administration (ie, single injection [not via indwelling catheter] versus continuous infusion or intermittent bolus via catheter). However, it is important to recognize that code 62311 excludes injection/infusion of a neurolytic substance, which is reported by codes 62280-62282. Therefore, based on the above information and in answer to your specific question, since code 62311 includes the injection of non-neurolytic substances, it would not be appropriate to separately report code 64483, Injection, anesthetic agent and/or steroid, transforaminal epidural; lumbar or sacral, single level.