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

William E Toppen, MD

Individual provider Internal Medicine Physician · NPI 1215399407

William E Toppen, MD is an Undersea and Hyperbaric Medicine in San Diego, California. Graduated from University of California, Geffen School of Medicine in 2016, 10 years ago. Practices with Regents of the University of California, a 2,061-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
10
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

200 W Arbor Dr
San Diego, CA 92103-9000
Phone: (800) 926-8273
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 9300 Campus Point Dr, La Jolla, CA 92037-1300 — (800) 926-8273
  • 757 Westwood Plz, Los Angeles, CA 90095-7419 — (310) 825-7417

Specialties & licences

Undersea and Hyperbaric Medicine (Emergency Medicine) Physician (primary) Taxonomy 207PE0005X · Licence A155816 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A155816 (CA)

Record details

NPI number1215399407
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 25, 2016
Last updated in NPPESJanuary 29, 2025
Certification dateJanuary 29, 2025

Medicare enrollment

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

Medicare specialtyUNDERSEA AND HYPERBARIC MEDICINE
Also practisesHOSPITALIST, INTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Regents Of The University Of California — 2061 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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