THAI DINH NGUYEN M.D.
NPI 1467547042
Internal Medicine in Santa Ana, CA

Q: What is Thai Nguyen's NPI number?

The NPI number for Thai Nguyen is 1467547042. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Q: What is Thai Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Thai Nguyen was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since October 03, 2006PECOS EnrolledAccepts Medicare Assignment

5030 WESTMINSTER AVE, SANTA ANA, CA 92703(714) 775-8090(657) 251-0494 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 20, 2026, Nov 8, 2023, Nov 3, 2023 (3 updates tracked since 2023).

On this page

About Thai Dinh Nguyen M.d. NPPES

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

THAI DINH NGUYEN M.D. (NPI 1467547042) is an individual internal medicine provider in Santa Ana, California, licensed in California (A91024) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (2003).

NPPES Registry Identity

NPI1467547042

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameTHAI DINH NGUYENCredential: M.D.

Location Address5030 WESTMINSTER AVESanta Ana, CA 92703-1151

Mailing Address5030 Westminster AveSanta Ana, CA 92703-1151 · (714) 775-8090 · Fax (657) 251-0494

Phone(714) 775-8090

Fax(657) 251-0494

Sole ProprietorNo

Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2003

Enumeration DateOctober 3, 2006

Last NPPES UpdateJuly 20, 20263 updates tracked since enumeration

NPPES CertifiedJuly 20, 2026

✔ NPI 1467547042 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A91024

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

5030 WESTMINSTER AVE, Santa Ana, CA 92703

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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 and accepts Medicare assignment

Thai Dinh Nguyen M.d. 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 ID1254435811

PECOS Enrollment IDI20070409000568

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

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

Theresa Thanh Ngoc Nguyen, MD, Inc.

Same address

Internal Medicine

5030 WESTMINSTER AVE
Santa Ana, CA 92703

Reassigned Medicare billing, California enrollment
3 clinicians in this Medicare group

NPI 1750667192 (714) 775-8090

Family Choice Aco Inc

3.5 mi

Internal Medicine

7631 WYOMING ST STE 201
Westminster, CA 92683

Reassigned Medicare billing, California enrollment
75 clinicians in this Medicare group

NPI 1396416863 (714) 868-0765

Nm Family Services LLC

657 mi

Physical Therapist

5312 RIO BRAVO DR STE 10
Santa Teresa, NM 88008

Reassigned Medicare billing, New Mexico enrollment
11 clinicians in this Medicare group

NPI 1649697657 (575) 915-1338

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 14

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.

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

663 services256 patients

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.

656 services296 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.

511 services224 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

443 services117 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

177 services177 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

175 services175 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

105 services105 patients

Transitional care management services for problem of at least moderate complexity 99495

Transitional care management services focus on coordinating and managing your care after you leave the hospital. For moderate complexity problems, this involves managing your medications, arranging further treatments, and ensuring you have the necessary follow-ups.

24 services22 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

22 services22 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

22 services22 patients

Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438

An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.

22 services22 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

18 services16 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

18 services16 patients

Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment G0402

An Initial Preventive Physical Examination, also known as a "Welcome to Medicare" visit, is a one-time, face-to-face visit during your first 12 months of Medicare enrollment. It includes a review of your health, as well as education and counseling about preventive services and further screenings.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92703 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

25 suppliers57 claims113 services$5.39 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

21 suppliers44 claims45 services$0.93 avg. paid by Medicare

Transport chair, adult size, patient weight capacity up to and including 300 pounds E1038

DME-Other DME · category DE000N

2 suppliers18 claims18 services$9.06 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

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

THERESA THANH NGOC NGUYEN M.D.

Internal Medicine

5030 WESTMINSTER AVE
SANTA ANA, CA 92703

Orange County (714) 775-8090

TAM THI MINH NGUYEN

Nurse Practitioner (Women's Health)

5030 WESTMINSTER AVE
SANTA ANA, CA 92703

Orange County (714) 775-8090

THERESA THANH NGOC NGUYEN, MD, INC.

Internal Medicine

5030 WESTMINSTER AVE
SANTA ANA, CA 92703

Orange County (714) 775-8090

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 Thai Nguyen's NPI number?

The NPI number for Thai Nguyen is 1467547042. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Where is Thai Nguyen located?

Thai Nguyen practices at 5030 Westminster Ave, Santa Ana, CA 92703. The listed phone number is (714) 775-8090.

What is Thai Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Thai Nguyen enrolled in Medicare?

Yes. Thai 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 Thai Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thai Nguyen reassigns Medicare benefits to 3 organizations: Theresa Thanh Ngoc Nguyen, MD, Inc. (Santa Ana, CA), Family Choice Aco Inc (Westminster, CA) and Nm Family Services LLC (Santa Teresa, NM). 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 Thai 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 Thai Nguyen was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.