Gregory Leong, M.D.
NPI 1174592158 · Forensic Psychiatry Physician · Patton, CA
Gregory Leong, M.D. is a Forensic Psychiatry Physician provider in Patton, CA (NPI 1174592158).
Provider details
- NPI number
- 1174592158
- Entity type
- Individual
- Primary specialty
- Forensic Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD00025101 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-14
- Last updated
- 2012-07-05
Frequently asked questions
- What is Gregory Leong's NPI number?
- Gregory Leong's National Provider Identifier (NPI) is 1174592158, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Leong's specialty?
- Gregory Leong is listed in the NPPES registry with a primary specialty of Forensic Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Leong located?
- Gregory Leong's practice location on file with NPPES is 3102 E Highland Ave, Patton, CA 92369-7813.
- What is Gregory Leong's phone number?
- The practice phone number listed in the NPPES registry for Gregory Leong is (909) 425-6509.
- Is Gregory Leong's NPI active?
- Yes — Gregory Leong's NPI (1174592158) is active in the NPPES registry as of the last update on 2012-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.