Table 2.

Unit costs

Resource	Description/Size	Cost*
Initial visit	CPT 92004 (comprehensive, new patient) plus weighted costs for visual field examination (CPT 92082), gonioscopy (CPT 92020), evaluation of optic disc (CPT 92135), optic nerve head photograph (CPT 92235), and fundus evaluation (CPT 92250) per Fremont et al17	$582.6120
Follow-up visit	CPT 92012 (intermediate, established patient) and visual acuity examination (CPT 99173) per Fremont et al17	$117.6820
Prostaglandin analog	2.5 mL	$81.6019
Fixed-combination dorzolamide 2.0%-timolol 0.5%	5 mL	$130.8019
Brimonidine 0.1%	5 mL	$62.8019
Brinzolamide 1.0%	10 mL	$91.3819
Timolol 0.25%	5 mL	$17.9319
Other	5 mL	$75.73 (assumption)

^*Note: Costs are expressed in 2009 US$.