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DR. DIEUMY THAI M.D.
NPI 1639270275
Physical Medicine & Rehabilitation - Pain Medicine in Westminster, CA

Active since September 26, 2006PECOS EnrolledAccepts Medicare Assignment
16401 MAGNOLIA ST, WESTMINSTER, CA 92683(714) 596-4288(714) 596-2388 Get Directions Write a Review

NPPES record last updated: February 17, 2010. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Dr. Dieumy Thai M.d. NPPES

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

DR. DIEUMY THAI M.D. (NPI 1639270275) is an individual pain medicine provider in Westminster, California, licensed in California (G64401) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (1987).

NPPES Registry Identity

NPI1639270275
Entity TypeIndividualFemale
Primary Taxonomy2081P2900X
Provider Legal NameDR. DIEUMY THAICredential: M.D.
Location Address16401 MAGNOLIA STWestminster, CA 92683-7827
Mailing AddressPo Box 9015Fountain Valley, CA 92728-9015 · (714) 596-4288 · Fax (714) 596-2388
Phone(714) 596-4288
Fax(714) 596-2388
Sole ProprietorYes
Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 1987
Enumeration DateSeptember 26, 2006
Last NPPES UpdateFebruary 17, 2010
✔ NPI 1639270275 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPhysical Medicine & Rehabilitation · Pain MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2081P2900X
License✔ Licensed in CA · G64401
Definition
A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists.
Also ListedPhysical Medicine & RehabilitationTaxonomy 208100000X · License G64401 (CA)
Also ListedPhysical Medicine & Rehabilitation · Spinal Cord Injury MedicineTaxonomy 2081P0004X · License G64401 (CA)
16401 MAGNOLIA ST, Westminster, CA 92683
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Other Names 1

Other Name (5)Dr. D. Michelle Thai M.d.

Other Identifiers 3

Medicaid00G644010CA
Medicare UPINF03135CA
Medicare ID-Type UnspecifiedG64401CA

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

Dr. Dieumy Thai 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 ID5395939458
PECOS Enrollment IDI20101102001251
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 Dieumy Thai reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Dieumy Michelle Thai, MD, Inc.
Same address
Pain Medicine
16401 MAGNOLIA ST
Westminster, CA 92683
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Dieumy Michelle Thai M D Inc
  • 4 clinicians in this Medicare group
NPI 1073625232 (714) 596-4288
Superior Medical Group
12 mi
Hospitalist
101 E VALENCIA MESA DR
Fullerton, CA 92835
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1780961474 (714) 871-3280

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 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
3,178 services216 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
171 services25 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
154 services145 patients

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.

ROLAND FONTANARES
Physical Therapist
16401 MAGNOLIA ST
WESTMINSTER, CA 92683
Orange County (657) 271-2100
DIEUMY MICHELLE THAI, MD, INC.
Physical Medicine & Rehabilitation (Pain Medicine)
16401 MAGNOLIA ST
WESTMINSTER, CA 92683
Orange County (714) 596-4288
TOTAL REHAB & HEALTH CENTER INC
Physical Therapist
16401 MAGNOLIA ST, SUITE # 107
WESTMINSTER, CA 92683
Orange County (714) 596-4288

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 Dieumy Thai's NPI number?

The NPI number for Dieumy Thai is 1639270275. It was assigned to this individual provider in the NPPES registry on September 26, 2006. The provider is also known as Dr. D. Michelle Thai M.D..

Where is Dieumy Thai located?

Dieumy Thai practices at 16401 Magnolia St, Westminster, CA 92683. The listed phone number is (714) 596-4288.

What is Dieumy Thai's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.

Is Dieumy Thai enrolled in Medicare?

Yes. Dieumy Thai 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 Dieumy Thai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dieumy Thai reassigns Medicare benefits to 2 organizations: Dieumy Michelle Thai, MD, Inc. (Westminster, CA) and Superior Medical Group (Fullerton, 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 Dieumy Thai'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 Dieumy Thai was last updated on February 17, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.