Differentiating between modifiers -52, -73, -74

Q. When is it appropriate to append modifier -74 (procedures discontinued after anesthesia administration or after the procedure has begun) or -73 (procedures discontinued prior to anesthesia) instead of to modifier -52 (reduced service)? Is there more than anesthesia that determines their use? The report below was coded with CPT^® 62311 (injection[s] of diagnostic or therapeutic substance[s]…; lumbar or sacral [caudal]). I asked the coder if modifier -74 should be appended, and the coder said that -52 should be appended. Is this correct?

Procedure: Attempted lumbar midline interlaminar epidural steroid injection L5-S1 with fluoroscopy 

After identifying the L5-S1 interlaminar space fluoroscopically, the skin was sterilely prepped and draped. The skin and subcutaneous tissue were anesthetized with 1% lidocaine. Utilizing a loss of resistance technique and intermittent fluoroscopic guidance, an 18 gauge Tuohy needle was utilized to approach the epidural space. I was not able to successfully identify the epidural space secondary to encountered resistance. The needle depth was checked on lateral views and noted to be superficial to the epidural space when resistance was encountered. We were going to utilize a caudal approach, however skin breakdown was noted. At this point, I elected to have her return for care in 2 weeks and get the skin breakdown in the caudal area treated.

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