Ophthalmology · McAllen, TX
NPI
1508897935
Since 2006
Specialty
Ophthalmology
Code 207W00000X
Group practices
2
Medicare group memberships
Hospitals
1
Hospital affiliations
1910 S 1st St
McAllen, TX, 78503
Phone (956) 687-3937
Groups this clinician bills Medicare through
Medicare paid, 2024
$79K
2,116 services
Medicare patients, 2024
325
Average age 75
Drug cost, 2024
$1.0M
9,495 prescriptions
Company payments, 2025
$318
From 5 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Errol O Grannum was code 92012 (ophthalmological e&m), 610 times for 272 patients. In total Errol O Grannum billed 2,116 services in 27 codes, and Medicare paid $79K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2007-07-08.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 92012 Ophthalmological E&M | Office | 610 | 272 | $53.71 | $33K |
| 92145 Test - Miscellaneous | Office | 280 | 175 | $7.73 | $2,164 |
| 92083 Vision, Hearing, and Speech Services | Office | 160 | 144 | $38.26 | $6,121 |
| 92020 Ophthalmological E&M | Office | 123 | 120 | $17.07 | $2,100 |
| 92133 Computerized Ophthalmic Imaging | Office | 120 | 118 | $21.80 | $2,616 |
| 99204 Office E&M - New | Office | 69 | 69 | $98.41 | $6,791 |
| 92250 Angiography | Office | 60 | 57 | $22.16 | $1,330 |
| 66761 Fluid Flow and Drainage of Eye (Any Method) | Office | 38 | 24 | $176.48 | $6,706 |
| 65855 Fluid Flow and Drainage of Eye (Any Method) | Office | 30 | 21 | $162.03 | $4,861 |
| 67820 Eye | Office | 25 | 16 | $11.90 | $297 |
| 76514 Ultrasound - Nonspecific | Office | 19 | 19 | $6.96 | $132 |
| 92201 Ophthalmological E&M | Office | 12 | 11 | $15.69 | $188 |
By year: 2022 $168K for 3,043 services; 2023 $100K for 2,281 services; 2024 $79K for 2,116 services.
Medicare prescription drug claims, 2024
In 2024, the drug Errol O Grannum prescribed most often to Medicare patients was Latanoprost, with 2,675 prescriptions and refills. In total Errol O Grannum wrote 9,495 Medicare prescriptions that cost $1.0M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Latanoprost Generic | 2,675 | 3,835 | 566 | $22K |
| Brimonidine Tartrate Generic | 805 | 1,437 | 213 | $25K |
| Erythromycin Erythromycin Base | 706 | 723 | 326 | $7,775 |
| Brimonidine Tartrate-Timolol Brimonidine Tartrate/Timolol | 626 | 1,006 | 187 | $102K |
| Timolol Maleate Generic | 600 | 1,038 | 155 | $6,201 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 569 | 1,018 | 146 | $9,928 |
| Dorzolamide Hcl Generic | 382 | 565 | 100 | $6,477 |
| Lumigan Bimatoprost | 379 | 677 | 104 | $196K |
| Combigan Brimonidine Tartrate/Timolol | 334 | 485 | 100 | $113K |
| Rocklatan Netarsudil Mesylat/Latanoprost | 270 | 336 | 62 | $120K |
| Ciprofloxacin Hcl Generic | 246 | 292 | 119 | $3,035 |
| Prednisolone Acetate Generic | 233 | 385 | 122 | $9,805 |
| Vyzulta Latanoprostene Bunod | 204 | 346 | 57 | $94K |
| Neomycin-Polymyxin-Dexameth Neomycin/Polymyxin B/Dexametha | 202 | 204 | 106 | $2,567 |
| Simbrinza Brinzolamide/Brimonidine Tart | 195 | 285 | 51 | $53K |
Brand drugs: 3,370 claims; generic drugs: 6,125 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Errol O Grannum $318 ($318 in general payments such as food, travel and fees) from 5 companies. The largest payer was Abbvie Inc. with $150.
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.