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KRYSTIANNA NGUYEN PH. D.
NPI 1922585793
Psychologist - Clinical in Orange, CA

Active since July 25, 2018PECOS Enrolled
500 N STATE COLLEGE BLVD STE 1100, ORANGE, CA 92868(949) 866-3392 Get Directions Write a Review

NPPES record last updated: March 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 13, 2026, Oct 5, 2022, Jul 25, 2018 (3 updates tracked since 2018).

About Krystianna Nguyen Ph. D. NPPES

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

KRYSTIANNA NGUYEN PH. D. (NPI 1922585793) is an individual clinical provider in Orange, California, licensed in California (33667) and active in the NPI registry since July 2018. She is enrolled in Medicare PECOS and maintains a secondary practice location in Newport Beach.

NPPES Registry Identity

NPI1922585793
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameKRYSTIANNA NGUYENCredential: PH. D.
Location Address500 N STATE COLLEGE BLVD STE 1100Orange, CA 92868-1625
Mailing Address1691 Mesa Dr Apt R09Newport Beach, CA 92660-0100
Phone(949) 866-3392
Sole ProprietorYes
Enumeration DateJuly 25, 2018
Last NPPES UpdateMarch 13, 20263 updates tracked since enumeration
NPPES CertifiedMarch 13, 2026
✔ NPI 1922585793 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in CA · 33667
Definition
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
Also ListedPsychologistTaxonomy 103T00000X · License 33667 (CA)
Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X · License 33667 (CA)
500 N STATE COLLEGE BLVD STE 1100, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Location 1

Location 14000 MacArthur Blvd Ste 600Newport Beach, CA 92660-2517 · Phone (714) 758-5912

Other Identifiers 1

Other33667CA · Licensed Psychologist

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Krystianna Nguyen Ph. D. 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.

Medicare Billing Reassignment

Medicare enrollment records show Krystianna Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kt Psychology Group PC
Same address
Clinical
500 N STATE COLLEGE BLVD STE 1100
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
NPI 1093663668 (949) 866-3392

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 92868 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
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
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.

BUENAVENTURA FOUNDATION
Case Management
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (714) 253-4277
MITZI LLAMAS CABALTICA NP
Registered Nurse (Psychiatric/Mental Health)
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (909) 901-3987
KT PSYCHOLOGY GROUP PC
Psychologist (Clinical)
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (949) 866-3392
SHARLYN ANN SUMBILLO PARK MS CCC-SLP
Speech-Language Pathologist
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (657) 215-6767
JUSTIN DANIEL TRICHTER LMFT
Marriage & Family Therapist
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (949) 682-8316
JUSTIN TRICHTER LICENSED MARRIAGE FAMILY THERAPIST PC
Marriage & Family Therapist
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (949) 682-8316
JASON ABRAHAM TOGISALA
Hospice Care, Community Based
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (562) 335-3777
UNIVERSAL HEALTH NET
Hospice Care, Community Based
500 N STATE COLLEGE BLVD STE 1100
ORANGE, CA 92868
Orange County (949) 690-5224

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 Krystianna Nguyen's NPI number?

The NPI number for Krystianna Nguyen is 1922585793. It was assigned to this individual provider in the NPPES registry on July 25, 2018.

Where is Krystianna Nguyen located?

Krystianna Nguyen practices at 500 N State College Blvd Ste 1100, Orange, CA 92868. The listed phone number is (949) 866-3392.

What is Krystianna Nguyen's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Krystianna Nguyen enrolled in Medicare?

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

Which organization bills Medicare for Krystianna Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Krystianna Nguyen reassigns Medicare benefits to Kt Psychology Group PC (Orange, CA). The 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 Krystianna 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 Krystianna Nguyen was last updated on March 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.