When performing a gonioscopy, an ophthalmologist examines the angle of the eye's anterior chamber to assess eye health and look for conditions such as glaucoma (365.xx). Code gonioscopies with 92020 (Gonioscopy [separate procedure]). 2007 National Medicare Physician Fee Schedule Allowable: $25.01 when performed in the office. Global period: N/A Sample covered diagnosis codes include (this is not a complete list; check your LCDs for a complete list): • 135 -- Sarcoidosis • 190.0 -- Malignant neoplasm of eyeball, except conjunctiva, cornea, retina and choroid • 234.0 -- Carcinoma in situ of eye • 250.50 -- Diabetes with ophthalmic manifestations; type II or unspecified type, not stated as uncontrolled • 360.30 -- Hypotony of eye, unspecified • 360.50 -- Foreign body, magnetic, intraocular, unspecified • 362.01 -- Background diabetic retinopathy • 362.84 -- Retinal ischemia • 364.00 -- Acute and subacute iridocyclitis, unspecified • 364.70 -- Adhesions of iris, unspecified • 365.00 -- Preglaucoma, unspecified • 365.01 -- Open angle with borderline glaucoma findings • 365.14 -- Glaucoma of childhood • 365.20 -- Primary angle-closure glaucoma, unspecified • 366.16 -- Senile nuclear sclerosis • 366.53 -- After-cataract, obscuring vision • 371.13 -- Posterior corneal pigmentations • 377.14 -- Glaucomatous atrophy (cupping) of optic disc • 379.31 -- Aphakia • 743.41 -- Congenital anomalies of corneal size and shape • 921.3 -- Contusion of eyeball • 996.69 -- Infection and inflammatory reaction due to other internal prosthetic device, implant and graft • V43.1 -- Lens replaced by other means. Codes Correct Coding Initiative (CCI) bundles as of Oct. 1, 2007: 92020 is a Column 1 code to 99211 92020 is a Column 2 code to 92018, 92019, 92285, 65855.