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DR. TAM M NGUYEN D.O.
NPI 1841200854
Internal Medicine in Marysville, CA

Active since August 09, 2006PECOS EnrolledAccepts Medicare Assignment
414 G ST, #110, MARYSVILLE, CA 95901(530) 741-2393(530) 741-2396 Get Directions Write a Review

NPPES record last updated: February 11, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 11, 2022, Mar 30, 2020 (2 updates tracked since 2020).

About Dr. Tam M Nguyen D.o. NPPES

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

DR. TAM M NGUYEN D.O. (NPI 1841200854) is an individual internal medicine provider in Marysville, California, licensed in California (20A8322) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Philadelphia College Of Osteopathic Medicine (1998).

NPPES Registry Identity

NPI1841200854
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. TAM M NGUYENCredential: D.O.
Location Address414 G ST, #110Marysville, CA 95901-5663
Mailing Address1800 Harrison St 7th FlOakland, CA 94612-3466 · (916) 784-4000
Phone(530) 741-2393
Fax(530) 741-2396
Sole ProprietorYes
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 1998
Enumeration DateAugust 9, 2006
Last NPPES UpdateFebruary 11, 20222 updates tracked since enumeration
NPPES CertifiedMarch 30, 2020
✔ NPI 1841200854 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · 20A8322
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
414 G ST, Marysville, CA 95901
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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

Dr. Tam M Nguyen D.o. 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 ID345228292
PECOS Enrollment IDI20040708000873
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

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.
19 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95901 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 15

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

JENNIFER ANN DUNCAN N.P
Nurse Practitioner
414 G ST, SUITE 208
MARYSVILLE, CA 95901
Yuba County (530) 741-1122
DR. MICHAEL L CHIN MD
Internal Medicine (Cardiovascular Disease)
414 G ST, SUITE 208
MARYSVILLE, CA 95901
Yuba County (530) 741-1122
DR. NATHAN H TANG M.D.
Internal Medicine
414 G ST, SUITE 110
MARYSVILLE, CA 95901
Yuba County (530) 741-2393
DR. BABAK SANEI FARD M.D.
Internal Medicine (Interventional Cardiology)
414 G ST, SUITE 108
MARYSVILLE, CA 95901
Yuba County (530) 749-6628
DR. KARANBIR S GREWAL M.D.
Internal Medicine (Interventional Cardiology)
414 G ST
MARYSVILLE, CA 95901
Yuba County (530) 749-4300
CARDIOGENT, INC.
Internal Medicine (Cardiovascular Disease)
414 G ST, STE 108
MARYSVILLE, CA 95901
Yuba County (530) 749-6628
MR. JACE WILLIAM KEISTER PA-C
Physician Assistant (Medical)
414 G ST, SUITE 208
MARYSVILLE, CA 95901
Yuba County (530) 741-1122
DR. WENCHIANG HAN M.D.
Specialist
414 G ST, SUITE 112
MARYSVILLE, CA 95901
Yuba County (530) 749-8801

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 Tam Nguyen's NPI number?

The NPI number for Tam Nguyen is 1841200854. It was assigned to this individual provider in the NPPES registry on August 9, 2006.

Where is Tam Nguyen located?

Tam Nguyen practices at 414 G St #110, Marysville, CA 95901. The listed phone number is (530) 741-2393.

What is Tam Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Tam Nguyen enrolled in Medicare?

Yes. Tam 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 Tam Nguyen was last updated on February 11, 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.