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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MALLORIE MAI LIEN THI NGUYEN MD
NPI 1912609256
Family Medicine in La Mesa, CA

Active since March 20, 2023PECOS Enrolled
8530 LA MESA BLVD STE 200, LA MESA, CA 91942(619) 515-2585 Get Directions Write a Review

NPPES record last updated: October 19, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mallorie Mai Lien Thi Nguyen Md NPPES

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

MALLORIE MAI LIEN THI NGUYEN MD (NPI 1912609256) is an individual family medicine provider in La Mesa, California, licensed in California (A197332) and active in the NPI registry since March 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1912609256
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameMALLORIE MAI LIEN THI NGUYENCredential: MD
Location Address8530 LA MESA BLVD STE 200La Mesa, CA 91942-0966
Mailing Address823 Gateway Center WaySan Diego, CA 92102-4541 · (619) 515-2300
Phone(619) 515-2585
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateMarch 20, 2023
Last NPPES UpdateOctober 19, 2026
NPPES CertifiedOctober 19, 2026
✔ NPI 1912609256 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 · A197332
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.
8530 LA MESA BLVD STE 200, La Mesa, CA 91942
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID6800384421
PECOS Enrollment IDI20251024000118
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

2

Medicare enrollment records show Mallorie Nguyen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Family Health Centers Of San Diego, Inc
2.2 mi
Federally Qualified Health Center (FQHC)
7592 BROADWAY
Lemon Grove, CA 91945
  • Reassigned Medicare billing, California enrollment
  • 1,100 clinicians in this Medicare group
NPI 1427282466 (619) 515-2300
Southern California Permanente Medical Group
5.0 mi
Health Maintenance Organization
4647 ZION AVE
San Diego, CA 92120
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1225060742 (619) 528-5000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91942 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
$94.87 typical visit price
range $62.10 – $184.71
Typical copayment $23.71 (range $15.52 – $46.17)
Most-billed visit code 99203
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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.

STEPHANIE JAUNE HARRIS FNP-BC
Nurse Practitioner (Family)
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 255-1184
SHANNON PACHECO PA-C
Physician Assistant
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 515-2585
DR. ADRIANNA JOY DANGREMOND MD
Family Medicine
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 515-2585
MS. STEPHANIE SANKEY N.P.
Nurse Practitioner (Family)
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 255-1184
DR. MITALI CHUMKI MITRA M.D.
Pediatrics
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 515-2585
FAMILY HEALTH CENTERS OF SAN DIEGO, INC
Clinic/Center (Federally Qualified Health Center (FQHC))
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 515-2585
FAMILY OF CHOICE, INC.
In Home Supportive Care
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 354-2544
LA MESA FAMILY HEALTH CENTER
Clinic/Center (Federally Qualified Health Center (FQHC))
8530 LA MESA BLVD STE 200
LA MESA, CA 91942
San Diego County (619) 515-2585

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 Mallorie Nguyen's NPI number?

The NPI number for Mallorie Nguyen is 1912609256. It was assigned to this individual provider in the NPPES registry on March 20, 2023.

Where is Mallorie Nguyen located?

Mallorie Nguyen practices at 8530 La Mesa Blvd Ste 200, La Mesa, CA 91942. The listed phone number is (619) 515-2585.

What is Mallorie Nguyen's specialty?

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

Is Mallorie Nguyen enrolled in Medicare?

Yes. Mallorie Nguyen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mallorie Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mallorie Nguyen reassigns Medicare benefits to 2 organizations: Family Health Centers Of San Diego, Inc (Lemon Grove, CA) and Southern California Permanente Medical Group (San Diego, 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 Mallorie 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 Mallorie Nguyen was last updated on October 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.