William Carrera, M.D.
NPI 1679014013 · Ophthalmology Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Carrera, M.D. is a Ophthalmology Physician provider in Oakland, CA (NPI 1679014013).
Provider details
- NPI number
- 1679014013
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A158123 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,244 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Imaging of Retina92134 | 378 | $50 |
| Extended Exam of the Back Part of the Eye With Optic Nerve Drawing92202 | 206 | $18 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 122 | $198 |
| Established Patient Problem Focused Exam of Visual System92012 | 120 | $113 |
| Injection of Drug Into Eye67028 | 101 | $144 |
| Compounded Drug, Not Otherwise ClassifiedJ7999 | 65 | $92 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 51 | 40 |
| Latanoprost | 19 | — |
| Ketorolac Tromethamine | 15 | 11 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 14 | — |
| Ofloxacin | 14 | 12 |
| Cyclosporinebrand: Restasis | 13 | — |
| Bromfenac Sodium | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$521 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-03-18
- Last updated
- 2024-07-16
- Certified
- 2024-07-16
Frequently asked questions
- What is William Carrera's NPI number?
- William Carrera's National Provider Identifier (NPI) is 1679014013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Carrera's specialty?
- William Carrera is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William Carrera located?
- William Carrera's practice location on file with NPPES is 3300 Telegraph Ave, Oakland, CA 94609-3028.
- What is William Carrera's phone number?
- The practice phone number listed in the NPPES registry for William Carrera is (510) 444-1600.
- Does William Carrera accept Medicare?
- William Carrera is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Carrera's NPI active?
- Yes — William Carrera's NPI (1679014013) is active in the NPPES registry as of the last update on 2024-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.