Dr. May Y. Mar, DO
- Medicare services, 2022
- 209
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 4,791
- Industry payments
- $24
- Affiliated sites
- 1
- Practice address
- 901 Nevin Ave, Richmond, CA 94801
- Practice phone
- Call (510) 307-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Richmond Medical Center
Richmond, California
Find Dr. Mar'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. May Y. Mar is a family medicine physician in Richmond, California
Dr. Mar practices at Richmond Medical Center in Richmond, California.
Dr. Mar's NPI, 1194110908, was assigned on March 30, 2015. Dr. Mar graduated from Arizona School of Dentistry and Oral Health - Mesa in 2015. Dr. Mar's California license number on file is 20A20198.
- NPI
- 1194110908NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456641851
- NPI enumeration date
- March 30, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (510) 307-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. May Y. Mar practices at Richmond Medical Center in Richmond, California
Dr. Mar's primary practice is Richmond Medical Center, at 901 Nevin Ave, Richmond, CA 94801 in Contra Costa County. The practice phone is (510) 307-1555.
- Richmond Medical Center901 Nevin Ave, Richmond, CA 94801 · Contra Costa CountyPhone(510) 307-1555
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. May Y. Mar is affiliated with 2 sites of care and 1 medical group
Dr. Mar's primary practice is Richmond Medical Center in Richmond, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Mar to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. May Y. Mar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mar practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Richmond Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. May Y. Mar is one of 15,680 family medicine physicians in California
Family medicine is Dr. Mar's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Mar is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Mar's licenses on file in 3 states: California, Washington and Arizona.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Washington license
- Arizona license
Family medicine physicians near Dr. Mar
Counts of family medicine physicians 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. May Y. Mar billed Medicare for 209 services in 2022
CMS data shows 209 Medicare services from Dr. Mar across 4 procedure codes in 2022, for 15 Medicare patients. Medicare paid $16,381 for them. Every service was in an office.
Dr. Mar's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1732022: 14118%
- Other services
- 2021: 592022: 3639%
- Surgery
- 2021: 122022: 32167%
- Lab and pathology
- 2021: 182022: 0100%
- Tests and treatments
- 2021: 122022: 0100%
Dr. Mar compared with the California median for family medicine physicians, 2022
- Dr. Mar
- California median
- Medicare services
- 209vs 24615% below
- Medicare patients
- 15vs 11887% below
- Part D claims
- 4,225vs 8335.1 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Mar's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mar and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. May Y. Mar treated 15 Medicare patients in 2024, average age 67
CMS counts 15 Medicare patients who saw Dr. Mar in 2024. Their average risk score is 2.16, 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. Mar's median patient age at 53, with 78% women.
Dr. Mar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women78%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. May Y. Mar wrote 4,791 Medicare Part D claims in 2024
In 2024, Dr. Mar wrote 4,791 Medicare Part D claims for 580 patients. 90% of them were for generic drugs. CMS names the drug for 4,225 of them, across 80 drugs with 11 or more claims each, at $125,136 in total drug cost. In 2023, CMS named 2,611 claims across 61 drugs.
Dr. Mar's Part D claims by kind of drug, 2024
- Generic4,320 claims90%
- Brand-name406 claims8%
- Other65 claims1%
Dr. Mar'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. Mar's Part D claims, 2024
- Opioids3%163 of 4,791 claims
- Antibiotics1%65 of 4,791 claims
- Antipsychotics, patients 65 and over1%30 of 4,791 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,6112024: 4,22562%
Drugs named by CMS: 80 in 2024, 61 in 2023.
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
Dr. May Y. Mar offers telehealth to Medicare patients
Dr. Mar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mar as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. May Y. Mar received $24 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Mar from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Dexcom, Inc. paid the most, $24.
Companies that paid Dr. Mar the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. May Y. Mar graduated from Arizona School of Dentistry and Oral Health - Mesa
Dr. Mar graduated from Arizona School of Dentistry and Oral Health - Mesa in 2015.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. May Y. Mar accepts plans from 7 insurance carriers
Dr. Mar is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Kaiser Permanente. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
- RI State Medicaid
Plan types Dr. Mar accepts, by number of carriers
- Medicare5
- PPO4
- HMO3
- POS3
- EPO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. May Y. Mar'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. May Y. Mar
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. May Y. Mar's NPI number?
Dr. May Y. Mar's NPI number is 1194110908. It was assigned on March 30, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. May Y. Mar?
Dr. May Y. Mar is a family medicine physician in Richmond, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. May Y. Mar practice?
Dr. Mar practices at 901 Nevin Ave, Richmond, CA 94801. Dr. Mar's primary practice is Richmond Medical Center in Richmond, California. Dmand AI also links Dr. Mar to 1 group practice or clinic.
What is Dr. May Y. Mar's office phone number?
The practice phone on file for Dr. Mar is (510) 307-1555.
What is Dr. May Y. Mar's medical license number?
Dr. Mar's California license number on file is 20A20198, one of the licenses on file in 3 states.
Which states has Dr. May Y. Mar been licensed in?
Dmand AI has state licenses on file for Dr. Mar in California (2022 to 2025), Washington (2018 to 2023) and Arizona (2015 to 2020).
What medical group is Dr. May Y. Mar part of?
Dr. Mar is linked to The Permanente Medical Group, Inc.
Does Dr. May Y. Mar accept Medicare?
Yes. CMS data shows Dr. Mar billed Medicare for 209 services in 2022, and Dr. Mar accepts Medicare assignment.
Does Dr. May Y. Mar offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mar as offering telehealth services.
How many Medicare patients does Dr. May Y. Mar see?
CMS counts 15 Medicare patients who saw Dr. Mar in 2024, with an average age of 67.
Show 7 more questionsShow fewer questions
Is Dr. May Y. Mar board certified?
Yes. Dr. Mar is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. May Y. Mar bill to Medicare?
In 2022, Dr. Mar's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. May Y. Mar go to medical school?
Dr. Mar graduated from Arizona School of Dentistry and Oral Health - Mesa in 2015.
What drugs does Dr. May Y. Mar prescribe most?
In 2024 Medicare Part D data, Dr. Mar's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Lisinopril.
Has Dr. May Y. Mar received payments from drug or device companies?
CMS Open Payments shows $24 in general payments to Dr. Mar from 1 company from 2024 to 2024. The largest total came from Dexcom, Inc.
How long has Dr. May Y. Mar been practicing?
Dr. Mar graduated from medical school in 2015, 11 years ago.
What insurance does Dr. May Y. Mar accept?
Dr. Mar is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Kaiser Permanente. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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