Sean Williams, M.D.
Pediatrics Physician · Los Angeles, CA
Sean Williams, M.D. is a pediatrics physician with a practice address in Los Angeles, California, and NPI 1033313242, issued on Jun 12, 2007. Check the license (California A97319, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sean Williams
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A97319 CA
Self-reported in NPPES; status is on the state search - Practice location
- 507 S Atlantic Blvd, Los Angeles, CA 90022
- Phone
- (323) 268-9191
- Enumerated
- Jun 12, 2007
- Record last updated
- May 30, 2015 (not updated in 11 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 507 S Atlantic Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joanna Calderon-Sandoval, M. D.Pediatrics Physician1376998252
- Iris Cervantes, RDADental Assistant1659134450
- Carolyn CortesRegistered Nurse1063279081
- Nataly GonzalezLicensed Vocational Nurse1649133083
- Julyana GuzmanDentist1154182970
- David Hoxsey, LCSWClinical Social Worker1114703931
Verify Sean Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97319Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $94.82
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Sean Williams among 9,272 pediatrics physician records in California
Sean Williams, 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. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 43% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2015 · 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).
919 pediatrics physician records list a practice address in Los Angeles
They are 919 of the 69,537 NPPES records with a practice address in Los Angeles, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Los Angeles → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Amado Jonathan Beltran, MDEast Los Angeles, CA 900221720617715
- Joanna Calderon-Sandoval, M. D.Los Angeles, CA 900221376998252
- Thambimuttu Jeyaranjan, M.D.Los Angeles, CA 900221669589644
- Norma Perez, MDLos Angeles, CA 900221083886519
- Miriam Salvador, M.D.Los Angeles, CA 900221336371939
- Ariel White, MDLos Angeles, CA 900221063918712
- Marco Monares, M.D.Los Angeles, CA 900231295943033
- Yolande Ou, MDLos Angeles, CA 900231750440764
Common questions
What is Sean Williams, M.D.'s NPI number?
Sean Williams, M.D.'s National Provider Identifier (NPI) is 1033313242, issued on Jun 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Sean Williams, M.D. located?
The NPPES record lists a practice address at 507 S Atlantic Blvd, Los Angeles, CA, 90022. Phone: (323) 268-9191. Providers update this record themselves, so call before visiting.
How can I verify Sean Williams, M.D.'s license?
NPPES lists California license number A97319, 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. Medicare files from data.cms.gov. 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.