1. Home
  2. Directory
  3. California
  4. Fountain Valley
  5. Internal Medicine
  6. NPI Profile

DR. MAI PHUONG THI NGUYEN MD
NPI 1265450266
Internal Medicine in Fountain Valley, CA

Active since July 17, 2006PECOS Enrolled
16027 BROOKHURST ST # I-110, FOUNTAIN VALLEY, CA 92708(844) 527-8620(844) 342-5278 Get Directions Write a Review

NPPES record last updated: October 14, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Mai Phuong Thi Nguyen Md NPPES

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

DR. MAI PHUONG THI NGUYEN MD (NPI 1265450266) is an individual internal medicine provider in Fountain Valley, California, licensed in California (A61956) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1265450266
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MAI PHUONG THI NGUYENCredential: MD
Location Address16027 BROOKHURST ST # I-110Fountain Valley, CA 92708-1551
Mailing Address16027 Brookhurst St # G110Fountain Valley, CA 92708-1551 · (707) 225-7031 · Fax (714) 531-1006
Phone(844) 527-8620
Fax(844) 342-5278
Sole ProprietorYes
Enumeration DateJuly 17, 2006
Last NPPES UpdateOctober 14, 2021
NPPES CertifiedOctober 14, 2021
✔ NPI 1265450266 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 · A61956
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.
16027 BROOKHURST ST # I-110, Fountain Valley, CA 92708
Open in Google Maps ↗

Other Identifiers 2

Medicaid00A619560CA
Other1265450266CA · Npi

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mai Phuong Thi Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
2 suppliers11 claims22 services$4.78 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$11.11 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$50.50 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

KARUNA HEALTHCARE CONSULTANTS, INC.
Internal Medicine
16027 BROOKHURST ST # I-110
FOUNTAIN VALLEY, CA 92708
Orange County (844) 527-8620

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 Mai Phuong Nguyen's NPI number?

The NPI number for Mai Phuong Nguyen is 1265450266. It was assigned to this individual provider in the NPPES registry on July 17, 2006.

Where is Mai Phuong Nguyen located?

Mai Phuong Nguyen practices at 16027 Brookhurst St # I-110, Fountain Valley, CA 92708. The listed phone number is (844) 527-8620.

What is Mai Phuong Nguyen's specialty?

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

Is Mai Phuong Nguyen enrolled in Medicare?

Yes. Mai Phuong Nguyen is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mai Phuong Nguyen was last updated on October 14, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.