William Trotter, M.D.
NPI 1447290515 · Ophthalmology Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Trotter, M.D. is a Ophthalmology Physician provider in Ventura, CA (NPI 1447290515).
Provider details
- NPI number
- 1447290515
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A68199 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
1,917 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) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 595 | $133 |
| Established Patient Problem Focused Exam of Visual System92012 | 486 | $94 |
| Imaging of Optic Nerve92133 | 224 | $38 |
| Exam of Visual Field With Extended Testing92083 | 200 | $68 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 127 | $27 |
| Imaging of Retina92134 | 125 | $42 |
| Removal of Cataract With Insertion of Prosthetic Lens |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,087 | 303 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 764 | 194 |
| Timolol Maleate | 527 | 160 |
| Bimatoprostbrand: Lumigan | 474 | 143 |
| Brimonidine Tartrate | 376 | 97 |
| Travoprost | 152 | 44 |
| Netarsudil Mesylatebrand: Rhopressa | 117 | 31 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,457 across 26 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
- 2006-06-07
- Last updated
- 2021-04-09
- Certified
- 2021-04-09
Frequently asked questions
- What is William Trotter's NPI number?
- William Trotter's National Provider Identifier (NPI) is 1447290515, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Trotter's specialty?
- William Trotter is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William Trotter located?
- William Trotter's practice location on file with NPPES is 3085 Loma Vista Rd, Ventura, CA 93003-2916.
- What is William Trotter's phone number?
- The practice phone number listed in the NPPES registry for William Trotter is (805) 648-3085.
- Does William Trotter accept Medicare?
- William Trotter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Trotter's NPI active?
- Yes — William Trotter's NPI (1447290515) is active in the NPPES registry as of the last update on 2021-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.