Table 1.

Medical and Pharmacy Codes Used for Study

Drug Class for IOP-Lowering Medications	GPI-10 Codes
Alpha agonist	8660201010, 8660202010
Beta blockers, ophthalmic	8625001010, 8625001210, 8625001510, 8625002010, 8625003000, 8625003010
Carbonic anhydrase inhibitors	8680232000, 8680234010
Miotics	8650102000, 8650103010
Prostaglandin analogs	8633001500, 8633005000, 8633006500, 8633007000, 8633008510
Combination products	8625990215, 8625990220
Other	8650202010, 8660001000
Diagnosis Codes for Pre-Index Variables	ICD-9-CM Codes
Hypertension	401.x, 402.x0, 403.xx, 404.x0, 404.x2, 405.xx
Hyperlipidemia	272.0-272.4
Diabetes	250.xx
Congestive heart failure	428.xx
Joint disorders	274.xx, 710.x, 712.x1-712.x4, 714.xx, 715.x1-715.x4, 718.x1-718.x4, 719.x1-719.x4
Muscle weakness/neuropathy/movement disorders	306.xx, 307.3, 332.x-335.xx, 340-345.xx, 354.x, 356.x, 358.xx, 359.xx, 438.xx, 710.4, 755.2x
Mental disorders	290.xx-299.xx, 300.12, 310.xx, 317, 318.x, 319, 330.x, 331.xx, 348.1, 758.0-758.3x
General glaucoma	365.xx
Open-angle glaucoma	365.1x
Procedure Codes for Pre-Index Variables	CPT Codes
Eye exam	92002, 92004, 92012, 92014, 92018, 92019, 92081, 92082, 92083, 92140
Glaucoma-related eye exam	92081, 92082, 92083, 92140
Glaucoma surgery	65850, 65855, 66170, 66172, 66180, 66185

CPT = Current Procedural Terminology; GPI = Generic Product Identifier;

ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; IOP = intraocular pressure.