NGUYEN AND MOK MEDICAL GROUP
NPI 1861594368
Pediatrics in Fountain Valley, CA

Q: What is Nguyen And Mok Medical Group's NPI number?

The NPI number for Nguyen And Mok Medical Group is 1861594368. It was assigned to this organization in the NPPES registry on September 4, 2006.

Q: What is Nguyen And Mok Medical Group's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Active since September 04, 2006

11100 WARNER AVE, SUITE 362, FOUNTAIN VALLEY, CA 92708(714) 434-4990(714) 434-4972 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

On this page

About Nguyen And Mok Medical Group NPPES

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

NGUYEN AND MOK MEDICAL GROUP (NPI 1861594368) is a healthcare organization registered as a pediatrics in Fountain Valley, California and active in the NPI registry since September 2006. The organization lists Minsen Mok, Co-owner, as its authorized official.

NPPES Registry Identity

NPI1861594368

Entity TypeOrganization

Primary Taxonomy208000000X

Legal Business NameNGUYEN AND MOK MEDICAL GROUP

Location Address11100 WARNER AVE, SUITE 362Fountain Valley, CA 92708-7506

Mailing Address11100 Warner Ave, Suite 362Fountain Valley, CA 92708-7506 · (714) 434-4990 · Fax (714) 434-4972

Phone(714) 434-4990

Fax(714) 434-4972

Organization SubpartNo

Authorized OfficialMinsen MokCo-owner · (714) 434-4990

Enumeration DateSeptember 4, 2006

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1861594368 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · A47915

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Also ListedInternal MedicineTaxonomy 207R00000X · License G73182 (CA)

Other Identifiers 1

MedicaidGR0095790CA

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nguyen And Mok Medical Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Nguyen And Mok Medical Group, which bills Medicare for the services this clinician delivers.

Clinician (1)

Minsen Mok, M.D.

Internal Medicine

NPI 1417059916

11100 WARNER AVE STE 104
Fountain Valley, CA 92708

(714) 306-6104

✔ PECOS

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

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 Nguyen And Mok Medical Group's NPI number?

The NPI number for Nguyen And Mok Medical Group is 1861594368. It was assigned to this organization in the NPPES registry on September 4, 2006.

Where is Nguyen And Mok Medical Group located?

Nguyen And Mok Medical Group is located at 11100 Warner Ave Suite 362, Fountain Valley, CA 92708. The listed phone number is (714) 434-4990.

What is Nguyen And Mok Medical Group's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Nguyen And Mok Medical Group enrolled in Medicare?

Yes. Nguyen And Mok Medical Group is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Nguyen And Mok Medical Group?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Nguyen And Mok Medical Group. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Nguyen And Mok Medical Group was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.