1. Home
  2. Directory
  3. California
  4. Costa Mesa
  5. Family Medicine
  6. NPI Profile

MANDY NGUYEN
NPI 1548849979
Family Medicine in Costa Mesa, CA

Active since April 04, 2021PECOS EnrolledAccepts Medicare Assignment
1190 BAKER ST STE 100, COSTA MESA, CA 92626(949) 791-3250 Get Directions Write a Review

NPPES record last updated: August 12, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 12, 2024, Aug 2, 2024, Sep 9, 2021 and 1 more (4 updates tracked since 2021).

About Mandy Nguyen NPPES

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

MANDY NGUYEN (NPI 1548849979) is an individual family medicine provider in Costa Mesa, California, licensed in California (20A21480) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS and is a graduate of Marian University College Of Osteopathic Medicine (2021).

NPPES Registry Identity

NPI1548849979
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameMANDY NGUYEN
Location Address1190 BAKER ST STE 100Costa Mesa, CA 92626-4105
Mailing Address1190 Baker St Ste 100Costa Mesa, CA 92626-4105
Phone(949) 791-3250
Sole ProprietorNo
Medical School CMSMarian University College Of Osteopathic MedicineGraduated 2021
Enumeration DateApril 4, 2021
Last NPPES UpdateAugust 12, 20244 updates tracked since enumeration
NPPES CertifiedAugust 12, 2024
✔ NPI 1548849979 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · 20A21480
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
1190 BAKER ST STE 100, Costa Mesa, CA 92626
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mandy Nguyen 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 ID6901267434
PECOS Enrollment IDI20230801001603
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

3

Medicare enrollment records show Mandy Nguyen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hoag Clinic
3.7 mi
Primary Care
510 SUPERIOR AVE
Newport Beach, CA 92663
  • Reassigned Medicare billing, California enrollment
  • 529 clinicians in this Medicare group
NPI 1942799523 (949) 791-3001
Healthcare Partners Affiliates Medical Group
5.7 mi
Addiction Medicine
14591 NEWPORT AVE
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1891981502 (714) 442-4864
Pih Health Physicians
7.4 mi
Otology & Neurotology
431 S BATAVIA ST STE 200
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 840 clinicians in this Medicare group
NPI 1083313589 (714) 516-9570

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 2

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.
33 services31 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.
30 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92626 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
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 9

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

CONNIE PHAM DO
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (949) 791-3250
JOHN JEON MD
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (949) 791-3250
DR. PRAVIN SHAW D.O.
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (714) 668-2500
DR. TRUCVY HOANG LE M.D.
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (949) 791-3250
DR. HAU DO MD
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (714) 668-2500
SUSAN LYNN FLAMING
Nurse Practitioner (Family)
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (714) 668-2500
ARTURO ACOSTA M.D.
Family Medicine
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (714) 668-2500
LYNN WHANG MD
Student in an Organized Health Care Education/Training Program
1190 BAKER ST STE 100
COSTA MESA, CA 92626
Orange County (949) 791-3250

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 Mandy Nguyen's NPI number?

The NPI number for Mandy Nguyen is 1548849979. It was assigned to this individual provider in the NPPES registry on April 4, 2021.

Where is Mandy Nguyen located?

Mandy Nguyen practices at 1190 Baker St Ste 100, Costa Mesa, CA 92626. The listed phone number is (949) 791-3250.

What is Mandy Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Mandy Nguyen enrolled in Medicare?

Yes. Mandy 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.

Which organizations bill Medicare for Mandy Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mandy Nguyen reassigns Medicare benefits to 3 organizations: Hoag Clinic (Newport Beach, CA), Healthcare Partners Affiliates Medical Group (Tustin, CA) and Pih Health Physicians (Orange, CA). Each 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 Mandy Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mandy Nguyen was last updated on August 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.