David Don Seilar Proum, MD
Family Medicine Physician · San Dimas, CA
David Don Seilar Proum, MD is a family medicine physician with a practice address in San Dimas, California, and NPI 1902898695, issued on Aug 18, 2005. Check the license (California A86091, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Don Seilar Proum
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A86091 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1255 W Arrow Hwy, San Dimas, CA 91773
- Phone
- (800) 780-1277
- Enumerated
- Aug 18, 2005
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120820000148); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1255 W Arrow Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Veena Bhatarakamol, D.O.Family Medicine Physician1073830964
- Christina ChaiPharmacist1346788445
- Cheryl ChanPharmacist1649718792
- Stephanie Chang, D.O.Family Medicine Physician1740387091
- Nghi Dang, D.O.Family Medicine Physician1750657193
- Erin Duncan, ODOptometrist1821191222
Verify David Don Seilar Proum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86091Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average family medicine physician in 2024
7,798 Medicare Part D claims for 929 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 307 claims were for opioids.
Most prescribed
- Atorvastatin Calcium716 claims
- Lisinopril326 claims
- Losartan Potassium321 claims
- Amlodipine Besylate273 claims
- Omeprazole242 claims
- Rosuvastatin Calcium241 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Dimas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Don Seilar Proum among 17,133 family medicine physician records in California
David Don Seilar Proum, MD is one of 17,133 family 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2002 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 family medicine physician records list a practice address in San Dimas
They are 29 of the 942 NPPES records with a practice address in San Dimas, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Dimas → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Norma Bachoura, M.D.San Dimas, CA 917731235191131
- Stephanie Chang, D.O.San Dimas, CA 917731740387091
- Steven Davis, D.O.San Dimas, CA 917731154300978
- Maria Dunton, DOSan Dimas, CA 917731639112386
- Candido Gamez, M.D.San Dimas, CA 917731689625972
- Rosanna Iskander, M.D.San Dimas, CA 917731265500896
- Sabah Kadhium, MDSan Dimas, CA 917731306836770
- Richard Magallon, MDSan Dimas, CA 917731316925530
Common questions
What is David Don Seilar Proum, MD's NPI number?
David Don Seilar Proum, MD's National Provider Identifier (NPI) is 1902898695, issued on Aug 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David Don Seilar Proum, MD located?
The NPPES record lists a practice address at 1255 W Arrow Hwy, San Dimas, CA, 91773. Phone: (800) 780-1277. Providers update this record themselves, so call before visiting.
How can I verify David Don Seilar Proum, MD's license?
NPPES lists California license number A86091, 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 David Don Seilar Proum, MD prescribe under Medicare Part D?
In 2024, David Don Seilar Proum, MD had 7,798 Medicare Part D claims for 929 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.