Paul Harrison Brown, M.D.
Psychiatry Physician · Diamond Bar, CA
Paul Harrison Brown, M.D. is a psychiatry physician with a practice address in Diamond Bar, California, and NPI 1437361789, issued on May 7, 2007. Check the license (California A26502, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Paul Harrison Brown
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A26502 CA
Self-reported in NPPES; status is on the state search - Practice location
- 750 N Diamond Bar Blvd, Diamond Bar, CA 91765
- Phone
- (909) 861-4663
- Enumerated
- May 7, 2007
- Record last updated
- Sep 11, 2025
- Fax
- (909) 861-5283
- Entity
- Type 1 · individual
Also registered at 750 N Diamond Bar Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barbara Ammon, PH.D.Clinical Psychologist1588749915
- Lorindha Argudo, MDInternal Medicine Physician1750477824
- Lubna Isho, DOFamily Medicine Physician1851350797
- Yvonne Rodriguez Lawson, MDFamily Medicine Physician1912967233
Verify Paul Harrison Brown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A26502Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average psychiatry physician in 2024
712 Medicare Part D claims for 46 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 20 claims were for opioids.
Most prescribed
- Clonazepam77 claims
- Alprazolam63 claims
- Lamotrigine54 claims
- Bupropion Xl51 claims
- Sertraline Hcl49 claims
- Escitalopram Oxalate45 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.
10 psychiatry physician records list a practice address in Diamond Bar
They are 10 of the 598 NPPES records with a practice address in Diamond Bar, and 8,673 psychiatry physician records in California.
All 10 in Diamond Bar → All 8,673 in California → Every provider in Diamond Bar →
Other psychiatry physician records in California
- Nancy Aaen, MDNapa, CA1609816669
- Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
- Mekabiz Abaian, MDSan Bernardino, CA1891090163
- Brenda Abarca, MDTorrance, CA1407485527
- Pilar Abascal, M.D.Los Angeles, CA1730528191
- Michele Abbasi, M.D.Westlake Village, CA1093940330
- Zohaib AbbasiMartinez, CA1013392224
- Sandy Abdelkedous, MDFresno, CA1306093109
- Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
- Ezzat Abdelmalek, M.DDana Point, CA1992828826
Common questions
What is Paul Harrison Brown, M.D.'s NPI number?
Paul Harrison Brown, M.D.'s National Provider Identifier (NPI) is 1437361789, issued on May 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Paul Harrison Brown, M.D. located?
The NPPES record lists a practice address at 750 N Diamond Bar Blvd, Diamond Bar, CA, 91765. Phone: (909) 861-4663. Providers update this record themselves, so call before visiting.
How can I verify Paul Harrison Brown, M.D.'s license?
NPPES lists California license number A26502, 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 Paul Harrison Brown, M.D. prescribe under Medicare Part D?
In 2024, Paul Harrison Brown, M.D. had 712 Medicare Part D claims for 46 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.