DR. ADRIENNE J NGUYEN MD
NPI 1376635219
Internal Medicine - Gastroenterology in San Carlos, CA

Q: What is Adrienne Nguyen's NPI number?

The NPI number for Adrienne Nguyen is 1376635219. It was assigned to this individual provider in the NPPES registry on September 29, 2006.

Q: What is Adrienne 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 Adrienne Nguyen was last updated on June 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 September 29, 2006PECOS EnrolledAccepts Medicare Assignment

1000 LAUREL ST, SAN CARLOS, CA 94070(650) 596-8800(650) 596-8802 Get Directions Write a Review

NPPES record last updated: June 3, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Adrienne J Nguyen Md NPPES

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

DR. ADRIENNE J NGUYEN MD (NPI 1376635219) is an individual gastroenterology provider in San Carlos, California, licensed in California (C53504) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Medstar Franklin Square Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1376635219

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameDR. ADRIENNE J NGUYENCredential: MD

Location Address1000 LAUREL STSan Carlos, CA 94070-3939

Mailing Address1000 Laurel StSan Carlos, CA 94070-3939 · (650) 596-8800 · Fax (650) 596-8802

Phone(650) 596-8800

Fax(650) 596-8802

Sole ProprietorNo

Medical School CMSUniversity Of Missouri, Kansas City, School Of MedicineGraduated 1996

Enumeration DateSeptember 29, 2006

Last NPPES UpdateJune 3, 2026

NPPES CertifiedJune 3, 2026

✔ NPI 1376635219 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 · C53504✔ Licensed in MO · 2013009358

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.

1000 LAUREL ST, San Carlos, CA 94070

Open in Google Maps ↗

Secondary Practice Locations 2

Location 16500 Hospital DrHannibal, MO 63401-6890 · Phone (573) 629-3491 · Fax (573) 629-3429

Location 26000 Hospital DrHannibal, MO 63401-6887 · Phone (573) 248-1300

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Kansas City, Oscar Insurance Company.Insurance ›

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

Dr. Adrienne J 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 ID5092751743

PECOS Enrollment IDI20130426000117, I20250903000754

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 4

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.

156 services130 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

62 services61 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.

36 services35 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

14 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Medstar Franklin Square Medical Center

Acute Care Hospitals · Rosedale, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210015

Location9000 Franklin Square DriveRosedale, MD 21237 · Baltimore County

Emergency services Birthing friendly

Medstar Union Memorial Hospital

Acute Care Hospitals · Baltimore, MD

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number210024

Location201 East University ParkwayBaltimore, MD 21218 · Baltimore City County

Emergency services

Medstar Harbor Hospital

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210034

Location3001 South Hanover StreetBaltimore, MD 21225 · Baltimore City County

Birthing friendly

Medstar Good Samaritan Hospital

Acute Care Hospitals · Baltimore, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number210056

Location5601 Loch Raven BoulevardBaltimore, MD 21239 · Baltimore City County

Emergency services

Hannibal Regional Hospital

Acute Care Hospitals · Hannibal, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number260025

Location6000 Hospital DrHannibal, MO 63401 · Marion County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94070 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

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 8

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

SCOTT D LEVENSON, MD

Internal Medicine (Gastroenterology)