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DIANA PHUONGTHAO TRAN
NPI 1154057420
Physician Assistant in Santa Ana, CA

Active since July 28, 2022PECOS EnrolledAccepts Medicare Assignment
999 N TUSTIN AVE STE 216, SANTA ANA, CA 92705(714) 545-5550 Get Directions Write a Review

NPPES record last updated: February 25, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Aug 20, 2023, Jan 16, 2023, Jul 28, 2022 (3 updates tracked since 2022).

About Diana Phuongthao Tran NPPES

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

DIANA PHUONGTHAO TRAN (NPI 1154057420) is an individual physician assistant in Santa Ana, California, licensed in California (PA61859) and active in the NPI registry since July 2022. She is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2022).

NPPES Registry Identity

NPI1154057420
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameDIANA PHUONGTHAO TRAN
Location Address999 N TUSTIN AVE STE 216Santa Ana, CA 92705-6506
Mailing Address999 N Tustin Ave Ste 216Santa Ana, CA 92705-6506
Phone(714) 545-5550
Sole ProprietorNo
Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2022
Enumeration DateJuly 28, 2022
Last NPPES UpdateFebruary 25, 20263 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2026
✔ NPI 1154057420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · PA61859
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
999 N TUSTIN AVE STE 216, Santa Ana, CA 92705
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Diana Phuongthao Tran 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 ID6901397009
PECOS Enrollment IDI20251117003462
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 92705 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
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 13

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

MINAL G PATEL PA-C
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5500
MONICA HUYENTRAN LIEU PA
Clinical Nurse Specialist (Psychiatric/Mental Health)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550
MARKET PHARMACY LLC
Pharmacy (Community/Retail Pharmacy)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 627-9190
SOPHIA THY DANG PA-C
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550
DOUGLAS BORGMAN PA-C, CAQ-PSYCH
Physician Assistant (Medical)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550
TATIANA GHEYBI PA-C
Physician Assistant
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550
SABRINA VILLATORO
Nurse Practitioner (Psychiatric/Mental Health)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550
NATALIE MICHELLE WONG
Clinical Nurse Specialist (Psychiatric/Mental Health)
999 N TUSTIN AVE STE 216
SANTA ANA, CA 92705
Orange County (714) 545-5550

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 Diana Tran's NPI number?

The NPI number for Diana Tran is 1154057420. It was assigned to this individual provider in the NPPES registry on July 28, 2022.

Where is Diana Tran located?

Diana Tran practices at 999 N Tustin Ave Ste 216, Santa Ana, CA 92705. The listed phone number is (714) 545-5550.

What is Diana Tran's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Diana Tran enrolled in Medicare?

Yes. Diana Tran 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.

When was this NPI record last updated?

The NPPES record for Diana Tran was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.