Quick answers
- Which hospitals does William E. Toppen work at?
- Medicare's official clinician data lists William E. Toppen at 2 hospitals: Palomar Health Downtown Campus and UC San Diego Health Hillcrest - Hillcrest Med Ctr. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William E. Toppen see patients?
- Medicare's clinician data lists 1 practice location in San Diego, CA. Call before your visit to confirm the address.
- What is William E. Toppen's specialty?
- Medicare lists Undersea and Hyperbaric Medicine as the primary specialty, and also Hospitalist and Internal Medicine.
- Does William E. Toppen accept Medicare assignment?
- Yes. Medicare's clinician data says William E. Toppen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does William E. Toppen offer telehealth?
- Medicare's clinician data says William E. Toppen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is William E. Toppen's NPI number?
- 1215399407. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William E. Toppen works
Medicare's Facility Affiliation Data lists William E. Toppen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Palomar Health Downtown CampusEscondido, CA · Acute Care Hospital · CCN 050115
- UC San Diego Health Hillcrest - Hillcrest Med CtrSan Diego, CA · Acute Care Hospital · CCN 050025
Practice locations
Addresses where William E. Toppen is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 W Arbor DrSan Diego, CA 92103
Group practices
Medicare enrollment lists William E. Toppen as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of California2,089 clinicians in the group
Specialties
- Undersea and Hyperbaric Medicineprimary
- Hospitalistalso
- Internal Medicinealso
Find other Undersea and Hyperbaric Medicine doctors in California →
Other hyperbaric medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1215399407 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians