Simon Y. Lee, M.D.
Pediatrics Physician · Pleasanton, CA
Simon Y. Lee, M.D. is a pediatrics physician with a practice address in Pleasanton, California, and NPI 1043229693, issued on Aug 5, 2006. Check the license (California CA A89711, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Simon Y. Lee
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- CA A89711 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5555 W Las Positas Blvd, Pleasanton, CA 94588
- Phone
- (925) 416-3672
- Enumerated
- Aug 5, 2006
- Record last updated
- Feb 25, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 5555 W Las Positas Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Abinav Baweja, MDMedical Oncology Physician1770961575
- Brooke BettsPharmacist1962178491
- Myrna Castelazo, M.D.Diagnostic Radiology Physician1407290513
Verify Simon Y. Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license CA A89711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Simon Y. Lee among 9,272 pediatrics physician records in California
Simon Y. Lee, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 56% newer
- In a Medicare fileNo · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2010 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 pediatrics physician records list a practice address in Pleasanton
They are 38 of the 2,213 NPPES records with a practice address in Pleasanton, and 9,272 pediatrics physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 9,272 in California → Every provider in Pleasanton → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Nilda Agnes Abellera, MDPleasanton, CA 945881609863638
- Mary Anastasiou, MDPleasanton, CA 945881154354116
- Stephen Anastasiou, MDPleasanton, CA 945881275568529
- Eda Chao, M.D.Pleasanton, CA 945881396734067
- Amy Gruber, MDPleasanton, CA 945881821176900
- Lionel Herrera, M.D.Pleasanton, CA 945881255366506
- Anna Kerr, MDPleasanton, CA 945881114987070
- Geoffrey Kotin, MDPleasanton, CA 945881992883052
Common questions
What is Simon Y. Lee, M.D.'s NPI number?
Simon Y. Lee, M.D.'s National Provider Identifier (NPI) is 1043229693, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Simon Y. Lee, M.D. located?
The NPPES record lists a practice address at 5555 W Las Positas Blvd, Pleasanton, CA, 94588. Phone: (925) 416-3672. Providers update this record themselves, so call before visiting.
How can I verify Simon Y. Lee, M.D.'s license?
NPPES lists California license number CA A89711, 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.