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Gastroenterology

Robert S. Fan, MD

Sees patients in Long Beach, CA · Thousand Oaks, CA · Los Angeles, CA · California

Summary

Robert S. Fan, MD (Gastroenterology) is enrolled with Medicare at 3 practice locations in Long Beach, CA, Thousand Oaks, CA and Los Angeles, CA. NPI 1275604480. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(562) 912‑3390 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Robert S. Fan, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

3Practice locations
GastroenterologyPrimary specialty
YesAccepts Medicare assignment
28Years since medical school (graduated 1998)
Medical College Of OhioMedical school
MaleGender (as listed)
West Gastroenterology Medical GroupGroup practice

Quick answers

Where does Robert S. Fan see patients?
Medicare's clinician data lists 3 practice locations, including Long Beach, CA, Thousand Oaks, CA and Los Angeles, CA. Call before your visit to confirm the address.
What is Robert S. Fan's specialty?
Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
Does Robert S. Fan accept Medicare assignment?
Yes. Medicare's clinician data says Robert S. Fan 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 Robert S. Fan?
(562) 912-3390, as listed in official Medicare / NPI Registry data.
What is Robert S. Fan's NPI number?
1275604480. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Robert S. Fan is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Robert S. Fan as a member of this group (CMS data updated 2026-10-02).

  • West Gastroenterology Medical Group4 clinicians in the group

Specialties

Find other Gastroenterology doctors in California →

Other gastroenterologists in Long Beach

Clinicians with the same Medicare primary specialty in Long Beach, CA — not a recommendation.

All gastroenterologists in Long Beach →

Clinician information

CredentialMD
Medical schoolMedical College Of Ohio
Graduation year1998
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1275604480
CorrectionsReport 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

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians