Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Howard Trolan, MD

Individual provider Preventive Medicine/Occupational Environmental Medicine Physician · NPI 1396889051

Dr. William Howard Trolan, MD is an Internal Medicine in Santa Clara, California. Graduated from Creighton University School of Medicine in 1986, 40 years ago. Practices with Pinnacle Medical Group, Inc, a 4-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
40
Trained at
Creighton University School of Medicine
Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1825 Civic Center Dr Ste 7
Santa Clara, CA 95050
Phone: (408) 985-2401
Fax: (408) 985-2405
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Preventive Medicine/Occupational Environmental Medicine Physician (primary) Taxonomy 2083P0500X · Licence G60676 (CA)

Record details

NPI number1396889051
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 16, 2007
Last updated in NPPESJanuary 30, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesFAMILY PRACTICE, PREVENTIVE MEDICINE
Medical schoolCREIGHTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Pinnacle Medical Group, Inc. — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount