William Howard Trolan, MD
Preventive Medicine/Occupational Environmental Medicine Physician · Santa Clara, CA
William Howard Trolan, MD is a preventive medicine/occupational environmental medicine physician with a practice address in Santa Clara, California, and NPI 1396889051, issued on Feb 16, 2007. Check the license (California G60676, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Howard Trolan
- Credential
- MD
- Primary taxonomy
- Preventive Medicine/Occupational Environmental Medicine Physician 2083P0500X
- License number
- G60676 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1825 Civic Center Drive, Santa Clara, CA 95050
- Phone
- (408) 985-2401
- Enumerated
- Feb 16, 2007
- Record last updated
- Jan 30, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (408) 985-2405
- Medicare enrollment
- Enrolled (PECOS I20090121000193); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest preventive medicine/occupational environmental medicine physician records → All 129 in California → Look up another NPI →
Verify William Howard Trolan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G60676Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average preventive medicine/occupational environmental medicine physician in 2024
15 Medicare Part D claims, against an average of 626 among the 189 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Bills Medicare through one group practice
- Pinnacle Medical Group, Inc.Salinas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Howard Trolan among 129 preventive medicine/occupational environmental medicine physician records in California
William Howard Trolan, MD is one of 129 preventive medicine/occupational environmental medicine physician records with a practice address in California. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 37% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated1986 · median 1991 among the 14 with a school on file
- Record last updated2008 · 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 2083P0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Preventive Medicine/Occupational Environmental Medicine Physician providers in California
There are 129 preventive medicine/occupational environmental medicine physician records in California.
All 129 in California → Every provider in Santa Clara → Preventive Medicine/Occupational Environmental Medicine Physician nationwide →
The 8 preventive medicine/occupational environmental medicine physician records with the nearest ZIP codes
- Rajiv Das, MDSan Jose, CA 951101932380995
- Hannah Edwards, MDSan Jose, CA 951191952491540
- Maria Gherman, MD MPHSan Jose, CA 951281437223344
- Johnston Co, M.D.Stockton, CA 952101114044096
- Ignacio Santana, MD, MPHMerced, CA 953411780189233
- Ramana Adapa, MDTracy, CA 953761407959315
- Diane Liu, M.D., M.P.H.Berkeley, CA 947201952459240
- Robert WagnerBerkeley, CA 947101558499079
Common questions
What is William Howard Trolan, MD's NPI number?
William Howard Trolan, MD's National Provider Identifier (NPI) is 1396889051, issued on Feb 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Howard Trolan, MD located?
The NPPES record lists a practice address at 1825 Civic Center Drive, Santa Clara, CA, 95050. Phone: (408) 985-2401. Providers update this record themselves, so call before visiting.
How can I verify William Howard Trolan, MD's license?
NPPES lists California license number G60676, 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 Howard Trolan, MD prescribe under Medicare Part D?
In 2024, William Howard Trolan, MD had 15 Medicare Part D claims; the average among preventive medicine/occupational environmental medicine physician prescribers was 626. Part D covers Medicare prescriptions only.
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.