Stanley Leong
Internal Medicine Physician · El Monte, CA
Stanley Leong is an internal medicine physician with a practice address in El Monte, California, and NPI 1043322936, issued on Aug 31, 2006. Check the license (California A40231, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Stanley Leong
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A40231 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10953 Ramona Blvd, El Monte, CA 91731
- Phone
- (626) 579-8463
- Enumerated
- Aug 31, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10953 Ramona Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gloria Aguilar, REGISTER NURSEAmbulatory Care Registered Nurse1043740731
- Sandra AlarconLicensed Vocational Nurse1952160756
- Juliana Alcaraz, RNRegistered Nurse1235902776
- Sonia Aleman, RNRegistered Nurse1023875853
- Everdina AlisangcoPediatrics Physician1649382219
- Joseph Allevato, MDFamily Medicine Physician1922148790
Verify Stanley Leong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A40231Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Stanley Leong among 17,696 internal medicine physician records in California
Stanley Leong is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in El Monte
They are 25 of the 1,528 NPPES records with a practice address in El Monte, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in El Monte → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Afshin Adhami, MDEl Monte, CA 917311104991686
- Charlie ChanEl Monte, CA 917311396857348
- Sandar Chen, MDEl Monte, CA 917311255747069
- Julia ChinEl Monte, CA 917311326336264
- Jasmine ChwaEl Monte, CA 917311831201805
- William HungEl Monte, CA 917311972615771
- Alvin KongEl Monte, CA 917311750480760
- Justin LeeEl Monte, CA 917311346344728
Common questions
What is Stanley Leong's NPI number?
Stanley Leong's National Provider Identifier (NPI) is 1043322936, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stanley Leong located?
The NPPES record lists a practice address at 10953 Ramona Blvd, El Monte, CA, 91731. Phone: (626) 579-8463. Providers update this record themselves, so call before visiting.
How can I verify Stanley Leong's license?
NPPES lists California license number A40231, 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.