Tao Nguyen, M.D.
Emergency Medicine Physician · Fontana, CA
Tao Nguyen, M.D. is an emergency medicine physician with a practice address in Fontana, California, and NPI 1598722506, issued on Apr 26, 2006. Check the license (California A100059, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tao Nguyen
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A100059 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9985 Sierra Ave, Fontana, CA 92335
- Phone
- (909) 427-5524
- Enumerated
- Apr 26, 2006
- Record last updated
- Nov 16, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 2486715 OH
- Medicare enrollment
- Enrolled (PECOS I20080717000633); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 9985 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Olga Acosta, MDPediatrics Physician1861404832
- Najjia Ahmed, M.D.Pediatrics Physician1699110395
- Anje'Le AlstonSports Medicine (Internal Medicine) Physician1356970842
- Peyman Andalib, MDStudent in an Organized Health Care Education/Training Program1104028000
- Gerald ArafolOccupational Therapist1134315666
- Lovie Jay Arguelles, PTPhysical Therapist1457472920
Verify Tao Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A100059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average emergency medicine physician in 2024
634 Medicare Part D claims for 411 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 96 claims were for opioids.
Most prescribed
- Cephalexin58 claims
- Hydrocodone-Acetaminophen47 claims
- Ibuprofen45 claims
- Amoxicillin-Clavulanate Potass39 claims
- Prednisone33 claims
- Ondansetron Odt28 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Andy Shen MD IncAlhambra, CA
- Cep America - CaliforniaApple Valley, CA
- Franciscan Medical GroupOrinda, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tao Nguyen among 7,751 emergency medicine physician records in California
Tao Nguyen, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2000 · median 2011 among the 4,560 with a school on file
- Record last updated2009 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 emergency medicine physician records list a practice address in Fontana
They are 55 of the 3,012 NPPES records with a practice address in Fontana, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fontana → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Pierre Assaf, MDFontana, CA 923351417969973
- Greg Capestany, MDFontana, CA 923351134277007
- Pushkar Chand, M.D.Fontana, CA 923351013074582
- Jonathan Chock, MDFontana, CA 923351770650624
- Karita Goulbourne, MDFontana, CA 923351619044500
- Charlene Jung, MDFontana, CA 923351346398146
- Shant Kalanjian, MDFontana, CA 923351942377841
- Ronald Lugo, MDFontana, CA 923351972670883
Common questions
What is Tao Nguyen, M.D.'s NPI number?
Tao Nguyen, M.D.'s National Provider Identifier (NPI) is 1598722506, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tao Nguyen, M.D. located?
The NPPES record lists a practice address at 9985 Sierra Ave, Fontana, CA, 92335. Phone: (909) 427-5524. Providers update this record themselves, so call before visiting.
How can I verify Tao Nguyen, M.D.'s license?
NPPES lists California license number A100059, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tao Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Tao Nguyen, M.D. had 634 Medicare Part D claims for 411 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Tao Nguyen, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.