Thuy Duong Mai, D.O.
Obstetrics & Gynecology Physician · Colton, CA
Thuy Duong Mai, D.O. is an obstetrics & gynecology physician with a practice address in Colton, California, and NPI 1154669299, issued on Jan 24, 2013. Check the license (California 20A11681, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thuy Duong Mai
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 20A11681 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 N Pepper Ave, Colton, CA 92324
- Phone
- (909) 580-3470
- Enumerated
- Jan 24, 2013
- Record last updated
- Oct 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 400 N Pepper Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shangrila AbaricoRegistered Nurse1609659325
- Susana AbaroRegistered Nurse1114425162
- Patricia AbbaRegistered Nurse1013188838
- Mohammad Hossein Abbasi, MD, MPHStudent in an Organized Health Care Education/Training Program1609622166
- Ala AbedrabboCertified Registered Nurse Anesthetist1972333144
- Mary AboagyeLicensed Vocational Nurse1982875605
Verify Thuy Duong Mai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
17 Medicare Part D claims for 12 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Thuy Duong Mai among 5,088 obstetrics & gynecology physician records in California
Thuy Duong Mai, D.O. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 78% of them.
- NPI issued2013 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 obstetrics & gynecology physician records list a practice address in Colton
They are 23 of the 2,459 NPPES records with a practice address in Colton, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Colton → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Tania Aftandilians, M.D.Colton, CA 923241780927236
- Dennis Carden, D.O.Colton, CA 923241366526170
- Michael Carter, DOColton, CA 923241306129820
- Mohammadreza Ghayuri, MDColton, CA 923241073711156
- Guillermo Giron Solano, M.D.Colton, CA 923241275773681
- Buuloc Luu, D.O.Colton, CA 923241073841201
- John Lyons, MDColton, CA 923241215905930
- Mallory Novack, D.O.Colton, CA 923241427324185
Common questions
What is Thuy Duong Mai, D.O.'s NPI number?
Thuy Duong Mai, D.O.'s National Provider Identifier (NPI) is 1154669299, issued on Jan 24, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Thuy Duong Mai, D.O. located?
The NPPES record lists a practice address at 400 N Pepper Ave, Colton, CA, 92324. Phone: (909) 580-3470. Providers update this record themselves, so call before visiting.
How can I verify Thuy Duong Mai, D.O.'s license?
NPPES lists California license number 20A11681, 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 Thuy Duong Mai, D.O. prescribe under Medicare Part D?
In 2024, Thuy Duong Mai, D.O. had 17 Medicare Part D claims for 12 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
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.