Dr. Brett D. Gerwin, M.D.
Ophthalmology (Ophthalmology Physician)
- Medicare participating
At a glance
- Medical school
- University of Alabama School of Medicine (2007)
- Years since graduation
- 19
- In the NPI registry since
- 2007
- Medicare patients seen, 2024
- 574
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2007Medical school: University of Alabama School of Medicine
- 2007Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Ophthalmology Physician primary
TN license 45994 · AL license 26155 -
Retina Specialist (Ophthalmology) Physician
TN license 45994
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Erlanger Medical Center Chattanooga, TN
- Highlands Medical Center Scottsboro, AL
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 574
- Services billed
- 10,401
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| Imaging of retina | 1,466 | 468 |
| Injection of drug into eye | 1,144 | 195 |
| Injection, ranibizumab, 0.1 mg | 880 | 28 |
| Injection, bevacizumab, 10 mg | 759 | 134 |
| Injection, aflibercept, 1 mg | 545 | 39 |
| Established patient complete exam of visual system | 293 | 240 |
| Photography of the retina | 105 | 94 |
| New patient complete exam of visual system | 96 | 96 |
| Established patient problem focused exam of visual system | 80 | 53 |
| Established patient office or other outpatient visit, 20-29 minutes | 45 | 43 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Prednisolone Acetate Other prescribers in Chattanooga, TN | 54 |
| Eylea (aflibercept) | 35 |
| Ketorolac Tromethamine Other prescribers in Chattanooga, TN | 20 |
| Eplerenone Other prescribers in Chattanooga, TN | 19 |
| Dorzolamide-Timolol (dorzolamide hcl/timolol maleat) Other prescribers in Chattanooga, TN | 12 |
| Prednisone Other prescribers in Chattanooga, TN | 11 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 6 companies reported 10 payments worth $361 in total to this clinician.
| Regeneron Healthcare Solutions, Inc. | $160 |
|---|---|
| Boston Scientific Corporation | $81.67 |
| Genentech USA, Inc. | $61.68 |
| Astellas Pharma US Inc | $21.28 |
| Apellis Pharmaceuticals, Inc. | $21.00 |
| Amgen Inc. | $15.05 |
| Food and Beverage | $361 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.