Vinh Mai, D.O.
Internal Medicine Physician · San Bernardino, CA
Vinh Mai, D.O. is an internal medicine physician with a practice address in San Bernardino, California, and NPI 1992887293, issued on Oct 19, 2006. Check the license (California 20A9129, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Vinh Mai
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A9129 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2101 N Waterman Ave, San Bernardino, CA 92404
- Phone
- (909) 881-4520
- Enumerated
- Oct 19, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (909) 881-4526
- Medicare enrollment
- Enrolled (PECOS I20070416000241); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2101 N Waterman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Vinh Mai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9129Check 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 internal medicine physician in 2024
327 Medicare Part D claims for 121 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Pantoprazole Sodium19 claims
- Furosemide17 claims
- Atorvastatin Calcium14 claims
- Albuterol Sulfate Hfa12 claims
- Prednisone12 claims
- Amoxicillin-Clavulanate Potass11 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.
Industry payments in 2024: $115.14
2 payments; by number, the most common kind was food and beverage; the largest payer was Merz North America, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Inpatient Specialists OF California PCSan Bernardino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vinh Mai among 17,696 internal medicine physician records in California
Vinh Mai, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2003 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
58 internal medicine physician records list a practice address in San Bernardino
They are 58 of the 5,645 NPPES records with a practice address in San Bernardino, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Bernardino → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shuang Bai, M.D.San Bernardino, CA 924041154346799
- Carina Buhay, MDSan Bernardino, CA 924041639143530
- Ronald Burton, MDSan Bernardino, CA 924041225008006
- Peter Csapoczi, MDSan Bernardino, CA 924041841357118
- Magdi Elsaadi, MDSan Bernardino, CA 924041902876683
- Ahamed Jiffry, MDSan Bernardino, CA 924041295848679
- Tony Kastoon, M.D.San Bernardino, CA 924041184636235
- Ernest Levister, MDSan Bernardino, CA 924041962577080
Common questions
What is Vinh Mai, D.O.'s NPI number?
Vinh Mai, D.O.'s National Provider Identifier (NPI) is 1992887293, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Vinh Mai, D.O. located?
The NPPES record lists a practice address at 2101 N Waterman Ave, San Bernardino, CA, 92404. Phone: (909) 881-4520. Providers update this record themselves, so call before visiting.
How can I verify Vinh Mai, D.O.'s license?
NPPES lists California license number 20A9129, 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 Vinh Mai, D.O. prescribe under Medicare Part D?
In 2024, Vinh Mai, D.O. had 327 Medicare Part D claims for 121 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.