William Trotter, M.D.
Ophthalmology Physician · Ventura, CA
William Trotter, M.D. is an ophthalmology physician with a practice address in Ventura, California, and NPI 1447290515, issued on Jun 7, 2006. Check the license (California A68199, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Trotter
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A68199 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3085 Loma Vista RD, Ventura, CA 93003
- Phone
- (805) 648-3085
- Enumerated
- Jun 7, 2006
- Record last updated
- Apr 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 648-7027
- Medicaid ID
- GR0076890 CA
- Medicare enrollment
- Enrolled (PECOS I20100922000219); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 3085 Loma Vista RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Batchelor, O.D.Optometrist1922312081
- Vladislav Bekerman, MDOphthalmology Physician1285138362
- Kathleen Beuttler, M.D.Ophthalmology Physician1669416103
- Michael Boggs, O.D.Optometrist1447287503
- Mark Brunette, O.D.Optometrist1538105846
- Steven Carter, MDOphthalmology Physician1275038267
Verify William Trotter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A68199Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average ophthalmology physician in 2024
4,663 Medicare Part D claims for 868 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Latanoprost1,087 claims
- Dorzolamide-Timolol764 claims
- Timolol Maleate527 claims
- Lumigan474 claims
- Brimonidine Tartrate376 claims
- Travoprost152 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,457.48
26 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Miramar Eye Specialists Medical Group IncCamarillo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Trotter among 2,899 ophthalmology physician records in California
William Trotter, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1995 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Ventura → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Kathleen Beuttler, M.D.Ventura, CA 930031669416103
- Steven Chang, M.D.Ventura, CA 930031174598239
- Joel Corwin, M.D.Ventura, CA 930031518901651
- John Davidson, M.D.Ventura, CA 930031205870748
- John Fang, M.D.Ventura, CA 930031467461574
- Emily Fant, M.D.Ventura, CA 930031447346416
- Donald Frambach, M.D.Ventura, CA 930031205870474
- Thomas Lee, MDVentura, CA 930031275620353
Common questions
What is William Trotter, M.D.'s NPI number?
William Trotter, M.D.'s National Provider Identifier (NPI) is 1447290515, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Trotter, M.D. located?
The NPPES record lists a practice address at 3085 Loma Vista RD, Ventura, CA, 93003. Phone: (805) 648-3085. Providers update this record themselves, so call before visiting.
How can I verify William Trotter, M.D.'s license?
NPPES lists California license number A68199, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Trotter, M.D. prescribe under Medicare Part D?
In 2024, William Trotter, M.D. had 4,663 Medicare Part D claims for 868 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is William Trotter, M.D.'s MIPS final score?
The 2023 MIPS final score is 83.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.