Dr. William M. Carrera, M.D.
Ophthalmology (Ophthalmology Physician)
- Medicare participating
At a glance
- Medical school
- Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (2017)
- Years since graduation
- 9
- In the NPI registry since
- 2017
- Medicare patients seen, 2024
- 404
Licensed in California since 2018, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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. What an NPI is
Education and training
- 2017Medical school: Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
- 2017Registered with an NPI (national billing number; not a license date)
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
CA license A158123 (first issued 2018; current) -
Retina Specialist (Ophthalmology) Physician
CA license A158123 (first issued 2018; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Alta Bates Summit Medical Center - Alta Bates Camp Berkeley, CA
Medical groups
- East Bay Retina Consultants A Medical Group Inc (6 clinicians)
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
- 404
- Services billed
- 1,846
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Imaging of retina | 105 | 99 |
| Removal of membrane of retina with removal of internal limiting membrane of retina | 44 | 44 |
| Removal of eye fluid (vitreous) between lens and retina | 32 | 32 |
| Established patient office or other outpatient visit, 20-29 minutes | 31 | 29 |
| Complex repair of detached retina and drainage of eye fluid between lens and retina | 21 | 20 |
| Injection of drug into eye | 20 | 19 |
| Repair of detached retina with drainage and removal of eye fluid between lens and retina | 19 | 18 |
| Removal of membrane of retina | 19 | 19 |
| Photography of the retina | 11 | 11 |
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 Oakland, CA | 51 |
| Latanoprost Other prescribers in Oakland, CA | 19 |
| Ketorolac Tromethamine Other prescribers in Oakland, CA | 15 |
| Dorzolamide-Timolol (dorzolamide hcl/timolol maleat) Other prescribers in Oakland, CA | 14 |
| Ofloxacin Other prescribers in Oakland, CA | 14 |
| Restasis (cyclosporine) Other prescribers in Oakland, CA | 13 |
| Bromfenac Sodium | 12 |
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, 4 companies reported 9 payments worth $6,637 in total to this clinician.
| Genentech USA, Inc. | $6,534 |
|---|---|
| Regeneron Pharmaceuticals, Inc. | $53.89 |
| Ani Pharmaceuticals, Inc. | $31.03 |
| Astellas Pharma US Inc | $17.81 |
| Consulting Fee | $5,655 |
|---|---|
| Travel and Lodging | $505 |
| Food and Beverage | $476 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Genentech USA, Inc. Oct 16, 2025 | Consulting Fee Vabysmo · Immunology and Ophthalmology | $5,655 |
| Genentech USA, Inc. Oct 16, 2025 | Travel and Lodging Vabysmo · Immunology and Ophthalmology · travel to Orlando, FL | $505 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.