Dr. Vinh B. Mai, DO
- Medicare services, 2024
- 579
- Medicare patients, 2024
- 177
- Part D claims, 2024
- 327
- Hospital affiliations
- 1
- Industry payments
- $139
- Practice address
- 2101 N Waterman Ave, San Bernardino, CA 92404
- Practice phone
- Call (909) 883-8711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mai's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Vinh B. Mai is an internist in San Bernardino, California
Dr. Mai practices at Dignity Health - St. Bernardine Medical Center in San Bernardino, California, part of CommonSpirit Health.
Dr. Mai's NPI, 1992887293, was assigned on October 19, 2006. Dr. Mai graduated from WesternU College of Osteopathic Medicine of the Pacific in 2003. Dr. Mai holds California license 20A9129.
- NPI
- 1992887293NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698870996
- NPI enumeration date
- October 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 883-8711
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Vinh B. Mai practices at Dignity Health - St. Bernardine Medical Center in San Bernardino, California
Dr. Mai's primary practice is Dignity Health - St. Bernardine Medical Center, at 2101 N Waterman Ave, San Bernardino, CA 92404 in San Bernardino County. The practice phone is (909) 883-8711.
- Dignity Health - St. Bernardine Medical Center2101 N Waterman Ave, San Bernardino, CA 92404 · San Bernardino CountyPhone(909) 883-8711
Source: Dmand AI Affiliation Data
Dr. Vinh B. Mai is affiliated with 1 site of care and 1 medical group
Dr. Mai's primary practice is Dignity Health - St. Bernardine Medical Center in San Bernardino, California, part of CommonSpirit Health. The medical group on file is Inpatient Specialist of California PC.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Vinh B. Mai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mai practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - St. Bernardine Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Vinh B. Mai is one of 16,751 internists in California
Internal medicine is Dr. Mai's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mai is board certified in 2005 - 2025 by the CA State License. Dr. Mai is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists cellulitis, chest pain, cirrhosis, gastrointestinal inflammation, heart attack, lung disease: COPD, asthma or bronchitis and non-surgical back problems among the conditions Dr. Mai treats.
Internists near Dr. Mai
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Vinh B. Mai billed Medicare for 579 services in 2024
CMS data shows 579 Medicare services from Dr. Mai across 5 procedure codes in 2024, for 177 Medicare patients. Medicare paid $51,421 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mai compared with the California median for internists, 2024
- Dr. Mai
- California median
- Medicare services
- 579vs 36160% above
- Medicare patients
- 177vs 15117% above
- Part D claims
- 96vs 42177% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Mai's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Mai?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mai and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Vinh B. Mai treated 177 Medicare patients in 2024, average age 71
CMS counts 177 Medicare patients who saw Dr. Mai in 2024. The largest group is 65 to 74, with 71 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 77% are also on Medicaid. Their average risk score is 3.37, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Mai's median patient age at 61, with 51% women.
Dr. Mai's Medicare patients by age, 2024
Dr. Mai's Medicare patients by sex, 2024
- Women7341%
- Men10459%
Chronic conditions among Dr. Mai's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Diabetes60%
- Heart failure58%
- Chronic kidney disease52%
- Arthritis46%
- Ischemic heart disease46%
- COPD41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Vinh B. Mai wrote 327 Medicare Part D claims in 2024
In 2024, Dr. Mai wrote 327 Medicare Part D claims for 121 patients. 79% of them were for generic drugs. CMS names the drug for 96 of them, across 7 drugs with 11 or more claims each, at $754 in total drug cost.
Dr. Mai's Part D claims by kind of drug, 2024
- Generic257 claims79%
- Brand-name and other70 claims21%
Dr. Mai's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mai's Part D claims, 2024
- Opioids5%15 of 327 claims
- Antibiotics22%71 of 327 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Vinh B. Mai takes part in Medicare
Dr. Mai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Vinh B. Mai received $139 in industry payments from 2024 to 2025
CMS Open Payments shows 4 general payments to Dr. Mai from 4 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Merz North America, Inc. paid the most, $90.
General payments to Dr. Mai by program year, 2024 to 2025
Companies that paid Dr. Mai the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Vinh B. Mai graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Mai graduated from WesternU College of Osteopathic Medicine of the Pacific in 2003.
- Medical school
- Board certified in 2005 - 2025
Source: Dmand AI Professional Profile Data
Dr. Vinh B. Mai accepts plans from 4 insurance carriers
Dr. Mai is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Mai accepts, by number of carriers
- Medicare4
- PPO3
- EPO1
- HMO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Vinh B. Mai's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Vinh B. Mai
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Vinh B. Mai's NPI number?
Dr. Vinh B. Mai's NPI number is 1992887293. It was assigned on October 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Vinh B. Mai?
Dr. Vinh B. Mai is an internist in San Bernardino, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Vinh B. Mai practice?
Dr. Mai practices at 2101 N Waterman Ave, San Bernardino, CA 92404. Dr. Mai's primary practice is Dignity Health - St. Bernardine Medical Center in San Bernardino, California, part of CommonSpirit Health.
What is Dr. Vinh B. Mai's office phone number?
The practice phone on file for Dr. Mai is (909) 883-8711.
What is Dr. Vinh B. Mai's medical license number?
Dr. Mai holds California license 20A9129.
Which hospitals is Dr. Vinh B. Mai affiliated with?
Dr. Mai practices at Dignity Health - St. Bernardine Medical Center in San Bernardino, California.
What medical group is Dr. Vinh B. Mai part of?
Dr. Mai is linked to Inpatient Specialist of California PC.
Does Dr. Vinh B. Mai accept Medicare?
Yes. CMS data shows Dr. Mai billed Medicare for 579 services in 2024, and Dr. Mai accepts Medicare assignment.
How many Medicare patients does Dr. Vinh B. Mai see?
CMS counts 177 Medicare patients who saw Dr. Mai in 2024, with an average age of 71.
Is Dr. Vinh B. Mai board certified?
Yes. Dr. Mai is board certified in 2005 - 2025 by the CA State License.
Show 6 more questionsShow fewer questions
What services does Dr. Vinh B. Mai bill to Medicare?
In 2024, Dr. Mai's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99232).
Where did Dr. Vinh B. Mai go to medical school?
Dr. Mai graduated from WesternU College of Osteopathic Medicine of the Pacific in 2003.
What drugs does Dr. Vinh B. Mai prescribe most?
In 2024 Medicare Part D data, Dr. Mai's most prescribed drugs by claims were Pantoprazole Sodium, Furosemide and Atorvastatin Calcium.
Has Dr. Vinh B. Mai received payments from drug or device companies?
CMS Open Payments shows $139 in general payments to Dr. Mai from 4 companies from 2024 to 2025. The largest total came from Merz North America, Inc.
How long has Dr. Vinh B. Mai been practicing?
Dr. Mai graduated from medical school in 2003, 23 years ago.
What insurance does Dr. Vinh B. Mai accept?
Dr. Mai is in network with 4 carriers, including Elevance, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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