Gregory Bruce Leong, M.D.
Forensic Psychiatry Physician · Patton, CA
Gregory Bruce Leong, M.D. is a forensic psychiatry physician with a practice address in Patton, California, and NPI 1174592158, issued on Mar 14, 2006. Check the license (California G34482, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory Bruce Leong
- Credential
- M.D.
- Primary taxonomy
- Forensic Psychiatry Physician 2084F0202X
- License numbers
- G34482 CA
MD00025101 WA
Self-reported in NPPES; status is on the state search - Practice location
- 3102 E Highland Ave, Patton, CA 92369
- Phone
- (909) 425-6509
- Enumerated
- Mar 14, 2006
- Record last updated
- Jul 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest forensic psychiatry physician records → All 109 in California → Look up another NPI →
Also registered at 3102 E Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shannon Bader, PHDClinical Psychologist1316266281
- Jason Bailie, PH.D.Clinical Neuropsychologist1932494432
- Emily BalandraStudent in an Organized Health Care Education/Training Program1427427319
- Rainer Bansuan, M.D.Adolescent Medicine (Family Medicine) Physician1336258037
Verify Gregory Bruce Leong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34482Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory Bruce Leong among 109 forensic psychiatry physician records in California
Gregory Bruce Leong, M.D. is one of 109 forensic psychiatry physician records with a practice address in California. 41% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 49% newer
- In a Medicare fileNo · 41% of these records are
- In the CMS Doctors and Clinicians fileNo · 14% of these records are
- Record last updated2012 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084F0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 forensic psychiatry physician record lists a practice address in Patton
They are 1 of the 339 NPPES records with a practice address in Patton, and 109 forensic psychiatry physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 109 in California → Every provider in Patton → Forensic Psychiatry Physician nationwide →
The 8 forensic psychiatry physician records with the nearest ZIP codes
- Larry Nahmias, M.D.Desert Hot Springs, CA 922401033149802
- Kenneth Galen, M.D.Riverside, CA 925071336474055
- Eric Marcus, M.D.San Diego, CA 921231235362237
- Benjamin Bensoul, M.D.San Diego, CA 921061558467118
- Dominick Addario, M.D.San Diego, CA 921031649496092
- Ansar Haroun, MDSan Diego, CA 921011174630404
- David Naimark, M.D.San Diego, CA 921011265458087
- David Sheffner, M.D.Newport Beach, CA 926631538309745
Common questions
What is Gregory Bruce Leong, M.D.'s NPI number?
Gregory Bruce Leong, M.D.'s National Provider Identifier (NPI) is 1174592158, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Bruce Leong, M.D. located?
The NPPES record lists a practice address at 3102 E Highland Ave, Patton, CA, 92369. Phone: (909) 425-6509. Providers update this record themselves, so call before visiting.
How can I verify Gregory Bruce Leong, M.D.'s license?
NPPES lists California license number G34482, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.