DUKE H NGUYEN MD
NPI 1679557797
Internal Medicine - Gastroenterology in Fountain Valley, CA

Q: What is Duke Nguyen's NPI number?

The NPI number for Duke Nguyen is 1679557797. It was assigned to this individual provider in the NPPES registry on December 1, 2005.

Q: What is Duke Nguyen's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Duke Nguyen was last updated on March 19, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.

Active since December 01, 2005PECOS EnrolledAccepts Medicare Assignment

9900 TALBERT AVE, STE 100, FOUNTAIN VALLEY, CA 92708(714) 378-7390(714) 378-7290 Get Directions Write a Review

NPPES record last updated: March 19, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Duke H Nguyen Md NPPES

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

DUKE H NGUYEN MD (NPI 1679557797) is an individual gastroenterology provider in Fountain Valley, California, licensed in California (A72508) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1996).

NPPES Registry Identity

NPI1679557797

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDUKE H NGUYENCredential: MD

Location Address9900 TALBERT AVE, STE 100Fountain Valley, CA 92708-5153

Mailing Address9900 Talbert Ave, Ste 100Fountain Valley, CA 92708-5153 · (714) 378-7390 · Fax (714) 378-7290

Phone(714) 378-7390

Fax(714) 378-7290

Sole ProprietorNo

Medical School CMSOtherGraduated 1996

Enumeration DateDecember 1, 2005

Last NPPES UpdateMarch 19, 2010

✔ NPI 1679557797 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · A72508

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.

9900 TALBERT AVE, Fountain Valley, CA 92708

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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

Duke H Nguyen 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 ID2567453541

PECOS Enrollment IDI20100217000314

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 8

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 low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

116 services105 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

106 services78 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

98 services98 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.

71 services71 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.

71 services71 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.

41 services41 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

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 20

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

BICHLIEN NGUYEN MD INC

Internal Medicine (Hematology & Oncology)

9900 TALBERT AVE, SUITE 103
FOUNTAIN VALLEY, CA 92708

Orange County (714) 378-5005

MALCOLM SPERLING MD

Surgery

9900 TALBERT AVE, SUITE 201
FOUNTAIN VALLEY, CA 92708

Orange County (714) 965-2500

LAURI B SEYMOUR MD

Internal Medicine

9900 TALBERT AVE, SUITE 302
FOUNTAIN VALLEY, CA 92708

Orange County (714) 965-2500

CAROLINE CONNER MD, INC

Obstetrics & Gynecology

9900 TALBERT AVE, SUITE 202
FOUNTAIN VALLEY, CA 92708

Orange County (714) 378-5552

DR DINETH KANTILAL PATEL MD A CALIFORNIA MEDICAL COPRPORATION

Internal Medicine (Critical Care Medicine)

9900 TALBERT AVE, SUITE 203
FOUNTAIN VALLEY, CA 92708

Orange County (714) 378-7010

JANICE RIVELLE

Internal Medicine

9900 TALBERT AVE
FOUNTAIN VALLEY, CA 92708

Orange County (714) 965-2500

KAREN M DON MD

Internal Medicine

9900 TALBERT AVE, SUITE 302
FOUNTAIN VALLEY, CA 92708

Orange County (714) 965-2500

DR. EUGENE D. ELLIOTT M.D.

Specialist

9900 TALBERT AVE, 101
FOUNTAIN VALLEY, CA 92708

Orange County (714) 241-0646

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 Duke Nguyen's NPI number?

The NPI number for Duke Nguyen is 1679557797. It was assigned to this individual provider in the NPPES registry on December 1, 2005.

Where is Duke Nguyen located?

Duke Nguyen practices at 9900 Talbert Ave Ste 100, Fountain Valley, CA 92708. The listed phone number is (714) 378-7390.

What is Duke Nguyen's specialty?

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

Is Duke Nguyen enrolled in Medicare?

Yes. Duke Nguyen 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 Duke Nguyen was last updated on March 19, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.