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Gastroenterology

Lillian Y. Choi, MD

Sees patients in Merced, CA · California

Summary

Lillian Y. Choi, MD (Gastroenterology) is enrolled with Medicare at 1 practice location in Merced, CA. NPI 1790769818. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(209) 720‑7183 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Lillian Y. Choi, 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

1Practice location
GastroenterologyPrimary specialty
YesAccepts Medicare assignment
28Years since medical school (graduated 1998)
University Of Colorado School Of Medicine, DenverMedical school
MaleGender (as listed)

Quick answers

Where does Lillian Y. Choi see patients?
Medicare's clinician data lists 1 practice location in Merced, CA. Call before your visit to confirm the address.
What is Lillian Y. Choi's specialty?
Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
Does Lillian Y. Choi accept Medicare assignment?
Yes. Medicare's clinician data says Lillian Y. Choi 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 Lillian Y. Choi?
(209) 720-7183, as listed in official Medicare / NPI Registry data.
What is Lillian Y. Choi's NPI number?
1790769818. 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 Lillian Y. Choi is enrolled with Medicare (CMS data updated 2026-10-02).

Specialties

Find other Gastroenterology doctors in California →

Other gastroenterologists in Merced

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

All gastroenterologists in Merced →

Clinician information

CredentialMD
Medical schoolUniversity Of Colorado School Of Medicine, Denver
Graduation year1998
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1790769818
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