STEVE NGUYEN D.O.
NPI 1649357732
Internal Medicine - Gastroenterology in Rosemead, CA

Q: What is Steve Nguyen's NPI number?

The NPI number for Steve Nguyen is 1649357732. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Q: What is Steve 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 Steve Nguyen was last updated on August 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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 November 01, 2006PECOS Enrolled

9120 VALLEY BLVD, ROSEMEAD, CA 91770(626) 316-8169 Get Directions Write a Review

NPPES record last updated: August 26, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Steve Nguyen D.o. NPPES

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

STEVE NGUYEN D.O. (NPI 1649357732) is an individual gastroenterology provider in Rosemead, California, licensed in California (20A7028) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of College Of Osteo Med Of The Pacific At Pomona (1995).

NPPES Registry Identity

NPI1649357732

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameSTEVE NGUYENCredential: D.O.

Location Address9120 VALLEY BLVDRosemead, CA 91770-1920

Mailing Address9120 Valley BlvdRosemead, CA 91770-1920 · (626) 316-8169

Phone(626) 316-8169

Sole ProprietorNo

Medical School CMSCollege Of Osteo Med Of The Pacific At PomonaGraduated 1995

Enumeration DateNovember 1, 2006

Last NPPES UpdateAugust 26, 2025

NPPES CertifiedAugust 26, 2025

✔ NPI 1649357732 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 · 20A7028

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.

9120 VALLEY BLVD, Rosemead, CA 91770

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Other Identifiers 1

Medicaid00AX70281CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Steve Nguyen D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3173578887

PECOS Enrollment IDI20050315001170

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.

Medicare Billing Reassignments

Medicare enrollment records show Steve Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Steve Nguyen Do Inc

Same address

Gastroenterology

9120 VALLEY BLVD
Rosemead, CA 91770

Reassigned Medicare billing, California enrollment

NPI 1598943649 (626) 316-8169

Wynn Medical Center Gastroenterology

Same address

Gastroenterology

9120 VALLEY BLVD
Rosemead, CA 91770

Reassigned Medicare billing, California enrollment

NPI 1467336438 (626) 316-8287

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

79 services30 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.

57 services48 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

48 services40 patients

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.

46 services33 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

34 services34 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.

30 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91770 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 7

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

WYNN MEDICAL CENTER THERAPIES

Clinic/Center (Physical Therapy)