Ochuko Gregson Diamreyan, M.D.
Psychiatry Physician · San Bernadino, CA
Ochuko Gregson Diamreyan, M.D. is a psychiatry physician with a practice address in San Bernadino, California, and NPI 1134171408, issued on May 16, 2006. Check the license (California A66432, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ochuko Gregson Diamreyan
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A66432 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2380 North Sierra Way, San Bernadino, CA 92405
- Phone
- (909) 556-7305
- Enumerated
- May 16, 2006
- Record last updated
- Dec 13, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (909) 886-7305
- Medicare enrollment
- Enrolled (PECOS I20040422000543); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify Ochuko Gregson Diamreyan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average psychiatry physician in 2024
2,402 Medicare Part D claims for 102 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Trazodone Hcl220 claims
- Risperidone157 claims
- Quetiapine Fumarate143 claims
- Olanzapine137 claims
- Fluoxetine Hcl123 claims
- Buspirone Hcl122 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: $543.32
24 payments; by number, the most common kind was food and beverage; the largest payer was Alkermes, 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.
Bills Medicare through one group practice
- Foothill Behavioral Health Consultants IncVictorville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1 psychiatry physician records list a practice address in San Bernadino
They are 1 of the 20 NPPES records with a practice address in San Bernadino, and 8,673 psychiatry physician records in California.
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 Ochuko Gregson Diamreyan, M.D.'s NPI number?
Ochuko Gregson Diamreyan, M.D.'s National Provider Identifier (NPI) is 1134171408, issued on May 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ochuko Gregson Diamreyan, M.D. located?
The NPPES record lists a practice address at 2380 North Sierra Way, San Bernadino, CA, 92405. Phone: (909) 556-7305. Providers update this record themselves, so call before visiting.
How can I verify Ochuko Gregson Diamreyan, M.D.'s license?
NPPES lists California license number A66432, 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 Ochuko Gregson Diamreyan, M.D. prescribe under Medicare Part D?
In 2024, Ochuko Gregson Diamreyan, M.D. had 2,402 Medicare Part D claims for 102 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.