Quick answers
- Which hospitals does Guy A. Weiss work at?
- Medicare's official clinician data lists Guy A. Weiss at 2 hospitals: Ronald Reagan UCLA Medical Center and Santa Monica - UCLA Med Ctr & Orthopaedic Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Guy A. Weiss see patients?
- Medicare's clinician data lists 9 practice locations, including Los Angeles, CA and Santa Monica, CA. Call before your visit to confirm the address.
- What is Guy A. Weiss's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Guy A. Weiss accept Medicare assignment?
- Yes. Medicare's clinician data says Guy A. Weiss 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 Guy A. Weiss offer telehealth?
- Medicare's clinician data says Guy A. Weiss offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Guy A. Weiss?
- (310) 825-7922, as listed in official Medicare / NPI Registry data.
- What is Guy A. Weiss's NPI number?
- 1598084030. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Guy A. Weiss works
Medicare's Facility Affiliation Data lists Guy A. Weiss at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
- Santa Monica - UCLA Med Ctr & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · CCN 050112
Practice locations
Addresses where Guy A. Weiss is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.
- 100 Medical PlazaLos Angeles, CA 90095
- 100 Medical Plz, Suite 310Los Angeles, CA 90095 (310) 825‑7922
- 200 Medical PlazaLos Angeles, CA 90095
- 200 Medical PlzLos Angeles, CA 90095
- 200 UCLA Medical Plz, Suite 165 34Los Angeles, CA 90095 (310) 824‑8403
Group practices
Medicare enrollment lists Guy A. Weiss as a member of this group (CMS data updated 2026-10-02).
- The Regents of the University of California1,462 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598084030 |
| 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