William Trolan, MD
NPI 1396889051 · Preventive Medicine/Occupational Environmental Medicine Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Trolan, MD is a Preventive Medicine/Occupational Environmental Medicine Physician provider in Santa Clara, CA (NPI 1396889051).
Provider details
- NPI number
- 1396889051
- Entity type
- Individual
- Primary specialty
- Preventive Medicine/Occupational Environmental Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G60676 (CA)
Specialties & taxonomies
- Preventive Medicine/Occupational Environmental Medicine PhysicianPrimary2083P0500XLicense G60676 (CA)
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-16
- Last updated
- 2008-01-30
Frequently asked questions
- What is William Trolan's NPI number?
- William Trolan's National Provider Identifier (NPI) is 1396889051, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Trolan's specialty?
- William Trolan is listed in the NPPES registry with a primary specialty of Preventive Medicine/Occupational Environmental Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Trolan located?
- William Trolan's practice location on file with NPPES is 1825 Civic Center Drive, Santa Clara, CA 95050.
- What is William Trolan's phone number?
- The practice phone number listed in the NPPES registry for William Trolan is (408) 985-2401.
- Does William Trolan accept Medicare?
- William Trolan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Trolan's NPI active?
- Yes — William Trolan's NPI (1396889051) is active in the NPPES registry as of the last update on 2008-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.