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DAO MEDICAL GROUP INC
NPI 1073957239
Internal Medicine in Garden Grove, CA

Active since April 18, 2013CLIA 05D2071466 · Waiver
9191 WESTMINSTER AVE, GARDEN GROVE, CA 92844(714) 899-2000(714) 583-6339 Get Directions Write a Review

NPPES record last updated: September 11, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dao Medical Group Inc NPPES

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

DAO MEDICAL GROUP INC (NPI 1073957239) is a healthcare organization registered as an internal medicine in Garden Grove, California and active in the NPI registry since April 2013. The organization holds a CLIA Waiver certificate valid through January 12, 2028 and lists Tom T Nguyen, Manager, as its authorized official.

NPPES Registry Identity

NPI1073957239
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameDAO MEDICAL GROUP INC
Location Address9191 WESTMINSTER AVEGarden Grove, CA 92844-2751
Mailing Address9191 Westminster AveGarden Grove, CA 92844-2751 · (714) 899-2000 · Fax (714) 583-6339
Phone(714) 899-2000
Fax(714) 583-6339
Organization SubpartNo
Authorized OfficialTom T NguyenManager · (714) 583-6279
Enumeration DateApril 18, 2013
Last NPPES UpdateSeptember 11, 2015
✔ NPI 1073957239 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
Also ListedFamily MedicineTaxonomy 207Q00000X
9191 WESTMINSTER AVE, Garden Grove, CA 92844
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dao Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

22

Medicare enrollment records show 22 clinicians reassign Medicare billing to Dao Medical Group Inc, which bills Medicare for the services they deliver. Of these, 15 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 12

Internal Medicine5
Nurse Practitioner4
Family Practice3
General Surgery2
Hospitalist1
Neurosurgery1
Obstetrics/Gynecology1
Osteopathic Manipulative Medicine1
4 other specialties4

Nearest to this location (20)

See all 22
Michael Dao, M.D.
Internal Medicine
NPI 1437321932
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Helen Do, NURSE PRACTITIONER
Nurse Practitioner
NPI 1386034296
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Ban Doan, M.D
Obstetrics/Gynecology
NPI 1346201696
9191 WESTMINSTER AVE STE 203
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Daniel Luong, M.D.
Internal Medicine
NPI 1811420508
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Helen Nguyen
Nurse Practitioner
NPI 1235919564
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Hung Quan, MD
Internal Medicine
NPI 1639263023
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS0.1 mi
Phuong Tran, DO
Osteopathic Manipulative Medicine
NPI 1295295343
9191 WESTMINSTER AVE
Garden Grove, CA 92844
(714) 899-2000
✔ PECOS✔ Accepts Medicare0.1 mi
Kevin Ho, DPM
Podiatry
NPI 1285815472
14571 MAGNOLIA ST SUTIE #206
Westminster, CA 92683
(714) 379-6400
✔ PECOS✔ Accepts Medicare0.6 mi
James Tran, M.D.
Internal Medicine
NPI 1598781346
15623 BROOKHURST ST
Westminster, CA 92683
(714) 531-9555
✔ PECOS✔ Accepts Medicare1.9 mi
Li Nguyen, M.D.
Otolaryngology
NPI 1902989064
15751 BROOKHURST ST STE 118
Westminster, CA 92683
(714) 775-8728
✔ PECOS✔ Accepts Medicare2.0 mi
Quang Binh Nguyen, MD
Family Practice
NPI 1982002598
202 N EUCLID ST STE 103
Santa Ana, CA 92703
(714) 265-9913
✔ PECOS✔ Accepts Medicare2.1 mi
Tien Nguyen, MD
Neurosurgery
NPI 1356385025
11190 WARNER AVE SUITE 305
Fountain Valley, CA 92708
(714) 433-2000
✔ PECOS✔ Accepts Medicare3.8 mi
Kim Trinh, M.D.
Internal Medicine
NPI 1356423396
11420 WARNER AVE
Fountain Valley, CA 92708
(714) 549-1300
✔ PECOS✔ Accepts Medicare3.8 mi
Donna Tran, DNP
Nurse Practitioner
NPI 1134301070
17195 NEWHOPE ST STE 107
Fountain Valley, CA 92708
(714) 444-2414
✔ PECOS✔ Accepts Medicare4.0 mi
Robert Bota, MD
Psychiatry
NPI 1407990773
3151 AIRWAY AVE BLDG R
Costa Mesa, CA 92626
(949) 288-5377
✔ PECOS✔ Accepts Medicare7.9 mi
Harish Yalamanchili, M.D.
General Surgery
NPI 1578874186
2121 E COAST HWY STE 150
Corona Del Mar, CA 92625
(949) 718-0905
✔ PECOS✔ Accepts Medicare12 mi
Teresa Nguyen, D.C., L. AC. NP
Nurse Practitioner
NPI 1831336593
803 FIGUEROA ST
Wilmington, CA 90744
(310) 830-0863
✔ PECOS18 mi
Kim Nguyen, MD
Family Practice
NPI 1053013771
5451 WALNUT AVE
Chino, CA 91710
(094) 648-6009
✔ PECOS✔ Accepts Medicare25 mi
Tuong Nguyen, M.D.
General Surgery
NPI 1831531565
7111 INDIANA AVE STE 100
Riverside, CA 92504
(951) 276-9012
✔ PECOS✔ Accepts Medicare35 mi
Huyen Tran
Hospitalist
NPI 1952833451
2 W FERN AVE
Redlands, CA 92373
(909) 793-3311
✔ PECOS✔ Accepts Medicare49 mi
See all 22 clinicians

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D2071466

Dao Medical Group, Inc. · Garden Grove, CA
Active · expires Jan 12, 2028
CLIA Number05D2071466
Laboratory TypePhysician Office
Certificate Effective DateJanuary 13, 2026
Certificate Expiration DateJanuary 12, 2028
Laboratory DirectorMichael M. Minh, MD
Laboratory Phone(714) 583-6320
Laboratory LocationDao Medical Group, Inc.9191 Westminster Ave Ste 205, Garden Grove, CA 92844
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

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 Dao Medical Group Inc's NPI number?

The NPI number for Dao Medical Group Inc is 1073957239. It was assigned to this organization in the NPPES registry on April 18, 2013.

Where is Dao Medical Group Inc located?

Dao Medical Group Inc is located at 9191 Westminster Ave, Garden Grove, CA 92844. The listed phone number is (714) 899-2000.

What is Dao Medical Group Inc's specialty?

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

Is Dao Medical Group Inc enrolled in Medicare?

Yes. Dao Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Dao Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 22 clinicians in 12 Medicare specialties reassign their Medicare billing to Dao Medical Group Inc. A 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 the clinician's services. The largest specialties are Internal Medicine (5), Nurse Practitioner (4) and Family Practice (3). Of these, 15 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Dao Medical Group Inc hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2071466) is associated with this NPI, valid through January 12, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Dao Medical Group Inc was last updated on September 11, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.