There are three CPT codes for professional services associated with contact lens care.  They are the heritage 92310, plus the two new therapeutic codes (92071 & 92072) that replaced 92070.

RVU values reflect clinical expertise & deserve mention:

92071 (OSD TX) - 1.1 RVU (per eye).   If you occasionally file bilaterally do so via .RT & .LT.

92072 (Keratoconic TX) - 3.51 RVU (per eye).  Ordinarily, file this bilaterally via .RT & .LT.   (7.02 RVU for 2 eyes)

92310 (typically cosmetic CL) - 2.77 (both eyes)

First, all describe "fitting & prescribing" of the contact lens.   So, clinicians must document their observations.   "If it's not recorded - it doesn't count" upon chart audit.

Second, both "therapeutic" codes (92071 & 92072) are unilateral.   Neither includes supply of contact lens materials.  Use appropriate V-codes for supply of CLs themselves (V2500-V2599).

Pearl, 92072 only covers initial fitting.  Subsequent visits are reported via appropriate E&M codes!  

So, typical keratoconic patient coding would look much like the following:  (371.60 typical ICDM)

Day one - 92004 + 92015 + 92025 + 76514 (pachymetry) + any other special procedure clinically deem necessary.             i.e. Oftentimes, 92286 is apropos (guttata etc).

Day two - 92072.RT & 92072.LT  + appropriate V-code for lenses themselves.

Day three - 99212, or 99213.  Although some suggest 92012 - I'd recomend E&M coding.

The heritage 92310 code remains bilateral.   If you fit a monocular, cosmetic CL merely file 92310.52 (.52 signifies reduced services).  

92310 should comprise a much higher percentage of CL fees than has historically been the case.   Use a tiered fee structure to reflect varying levels of work units for sphere, toric, multifocal, monovision......etc.  That's another topic unto itself.

Terry