Quick answers
- Which hospitals does Thomas K. Haddad work at?
- Medicare's official clinician data lists Thomas K. Haddad at 1 hospital: Kaiser Foundation Hospital - Walnut Creek. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas K. Haddad see patients?
- Medicare's clinician data lists 3 practice locations, including Walnut Creek, CA, Antioch, CA and Richmond, CA. Call before your visit to confirm the address.
- What is Thomas K. Haddad's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Thomas K. Haddad accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas K. Haddad 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 Thomas K. Haddad?
- (925) 295-4000, as listed in official Medicare / NPI Registry data.
- What is Thomas K. Haddad's NPI number?
- 1932151867. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas K. Haddad works
Medicare's Facility Affiliation Data lists Thomas K. Haddad at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - Walnut CreekWalnut Creek, CA · Acute Care Hospital · CCN 050072
Practice locations
Addresses where Thomas K. Haddad is enrolled with Medicare (CMS data updated 2026-10-02).
- 1425 S Main StWalnut Creek, CA 94596 (925) 295‑4000
- 4501 Sand Creek RdAntioch, CA 94531 (925) 813‑6500
- 901 Nevin AveRichmond, CA 94801 (510) 307‑1500
Group practices
Medicare enrollment lists Thomas K. Haddad as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932151867 |
| 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