Richard Mark Biebuyck, M.D.
Psychiatry Physician · Glendora, CA
Richard Mark Biebuyck, M.D. is a psychiatry physician with a practice address in Glendora, California, and NPI 1770521734, issued on Jun 3, 2006. Check the license (California A78684, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard Mark Biebuyck
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A78684 CA
Self-reported in NPPES; status is on the state search - Practice location
- 415 W Route 66, Glendora, CA 91740
- Phone
- (626) 963-4467
- Enumerated
- Jun 3, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (626) 963-9543
- Medicaid ID
- 00A786840 CA
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 415 W Route 66
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ghada Al-Asadi, MDPsychiatry Physician1598875239
- Maggie Ateia, PSY.D.Clinical Psychologist1003056680
- Piedad Castrillon, L.M.F.T.Marriage & Family Therapist1265899553
- John Cullen, MFTMarriage & Family Therapist1104035260
- George Ferenczi, M.D.Gastroenterology Physician1932270105
- -Rafik Girgis, M.D.Family Medicine Physician1225058597
Verify Richard Mark Biebuyck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78684Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average psychiatry physician in 2024
124 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Alprazolam18 claims
- Clonazepam15 claims
- Duloxetine Hcl12 claims
- Lorazepam12 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: $761.82
35 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,693 providers of this specialty with any payment received $4,954.93 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.
Richard Mark Biebuyck among 8,673 psychiatry physician records in California
Richard Mark Biebuyck, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Glendora → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Ghada Al-Asadi, MDGlendora, CA 917401598875239
- Kamron Fariba, DOGlendora, CA 917401407315864
- Said Jacob, M.D.Glendora, CA 917401528128949
- Zinovi Rozenblat, M.D.Glendora, CA 917401942495213
- Taghrid Sidhom, M.D.Glendora, CA 917401215124771
- Hafizullah Azizi, MDRancho Cucamonga, CA 917391912264938
- Anca Chiritescu, M.D.Rancho Cucamonga, CA 917391821040163
- William Gillespie, M.D.Glendora, CA 917411538238118
Common questions
What is Richard Mark Biebuyck, M.D.'s NPI number?
Richard Mark Biebuyck, M.D.'s National Provider Identifier (NPI) is 1770521734, issued on Jun 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Mark Biebuyck, M.D. located?
The NPPES record lists a practice address at 415 W Route 66, Glendora, CA, 91740. Phone: (626) 963-4467. Providers update this record themselves, so call before visiting.
How can I verify Richard Mark Biebuyck, M.D.'s license?
NPPES lists California license number A78684, 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 Richard Mark Biebuyck, M.D. prescribe under Medicare Part D?
In 2024, Richard Mark Biebuyck, M.D. had 124 Medicare Part D claims; 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.