Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Gregory Bruce Leong, MD

Individual provider Psychiatry Physician · NPI 1174592158

Dr. Gregory Bruce Leong, MD is a Psychiatry Physician in Patton, California. Practices as a sole proprietor. Licensed in California and Washington.

Licensed in
CA, WA
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3102 E Highland Ave
Patton, CA 92369-7813
Phone: (909) 425-6509
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Forensic Psychiatry Physician (primary) Taxonomy 2084F0202X · Licence G34482 (CA)
Psychiatry Physician Taxonomy 2084P0800X · Licence MD00025101 (WA)
Forensic Psychiatry Physician Taxonomy 2084F0202X · Licence MD00025101 (WA)
Psychiatry Physician Taxonomy 2084P0800X · Licence G34482 (CA)

Record details

NPI number1174592158
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 14, 2006
Last updated in NPPESJuly 5, 2012
Mailing address3102 E Highland Ave, Patton, CA 92369-7813

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