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LILLIAN Y CHOI MD
NPI 1790769818
Internal Medicine - Gastroenterology in Merced, CA

Active since December 01, 2005PECOS EnrolledAccepts Medicare Assignment
360 E YOSEMITE AVE STE 300, MERCED, CA 95340(209) 720-7183(209) 720-7371 Get Directions Write a Review

NPPES record last updated: March 24, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 28, 2022, Jul 12, 2019 (2 updates tracked since 2019).

About Lillian Y Choi Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LILLIAN Y CHOI MD (NPI 1790769818) is an individual gastroenterology provider in Merced, California, licensed in California (A70839) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Colorado School Of Medicine, Denver (1998).

NPPES Registry Identity

NPI1790769818
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameLILLIAN Y CHOICredential: MD
Location Address360 E YOSEMITE AVE STE 300Merced, CA 95340-8201
Mailing Address360 E Yosemite Ave Ste 300Merced, CA 95340-8201 · (209) 720-7183 · Fax (209) 720-7371
Phone(209) 720-7183
Fax(209) 720-7371
Sole ProprietorNo
Medical School CMSUniversity Of Colorado School Of Medicine, DenverGraduated 1998
Enumeration DateDecember 1, 2005
Last NPPES UpdateMarch 24, 20222 updates tracked since enumeration
NPPES CertifiedMarch 24, 2022
✔ NPI 1790769818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in CA · A70839✔ Licensed in AZ · 30991
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
360 E YOSEMITE AVE STE 300, Merced, CA 95340
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Secondary Practice Locations 2

Location 11083 Los Palos DrSalinas, CA 93901-3901 · Phone (831) 771-1456 ext. 3 · Fax (831) 757-4070
Location 27000 Boulder AveHighland, CA 92346-3348 · Phone (909) 862-1191

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Lillian Y Choi Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597768721
PECOS Enrollment IDI20070606000251
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
91 services55 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
59 services59 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
33 services33 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
17 services17 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95340 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LILLIAN CHOI MD INC
Internal Medicine (Gastroenterology)
360 E YOSEMITE AVE STE 300
MERCED, CA 95340
Merced County (209) 720-7183

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lillian Choi's NPI number?

The NPI number for Lillian Choi is 1790769818. It was assigned to this individual provider in the NPPES registry on December 1, 2005.

Where is Lillian Choi located?

Lillian Choi practices at 360 E Yosemite Ave Ste 300, Merced, CA 95340. The listed phone number is (209) 720-7183.

What is Lillian Choi's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Lillian Choi enrolled in Medicare?

Yes. Lillian Choi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Lillian Choi was last updated on March 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.