Quick answers
- Which hospitals does Frank S. Tzeng work at?
- Medicare's official clinician data lists Frank S. Tzeng at 2 hospitals: John Muir Medical Center - Concord Campus and John Muir Medical Center - Walnut Creek Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Frank S. Tzeng see patients?
- Medicare's clinician data lists 2 practice locations, including Concord, CA. Call before your visit to confirm the address.
- What is Frank S. Tzeng's specialty?
- Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
- Does Frank S. Tzeng accept Medicare assignment?
- Yes. Medicare's clinician data says Frank S. Tzeng 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.
- What is the phone number for Frank S. Tzeng?
- (925) 676-1995, as listed in official Medicare / NPI Registry data.
- What is Frank S. Tzeng's NPI number?
- 1932292315. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Frank S. Tzeng works
Medicare's Facility Affiliation Data lists Frank S. Tzeng at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
Practice locations
Addresses where Frank S. Tzeng is enrolled with Medicare (CMS data updated 2026-10-02).
- 2485 High School Ave, Suite 123Concord, CA 94520 (925) 676‑1995
- 2485 High School Ave, Suite 204Concord, CA 94520
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Concord
Clinicians with the same Medicare primary specialty in Concord, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932292315 |
| 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