John Williams III, M.D.
Maternal & Fetal Medicine Physician · Los Angeles, CA
John Williams III, M.D. is a maternal & fetal medicine physician with a practice address in Los Angeles, California, and NPI 1205819133, issued on Nov 23, 2005. Check the license (California G39794, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Williams III
- Credential
- M.D.
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- G39794 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8700 Beverly Blvd., Los Angeles, CA 90048
- Phone
- (310) 423-5000
- Enumerated
- Nov 23, 2005
- Record last updated
- May 17, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20091221000048); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 343 in California → Look up another NPI →
Also registered at 8700 Beverly Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marie Acorda Reece, NPAdult Health Nurse Practitioner1528331485
- Songolaye Akinloye, P.A.Surgical Physician Assistant1487781043
- Arie Alkalay, M.D.Specialist1265419154
- Alexander Allins, M.D.Specialist1033193016
- Harold Amer, M.D.Pediatrics Physician1447237359
- David Balfe, M.D.Pulmonary Disease Physician1265410146
Verify John Williams III in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G39794Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 87.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John Williams III among 343 maternal & fetal medicine physician records in California
John Williams III, M.D. is one of 343 maternal & fetal medicine physician records with a practice address in California. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1978 · median 2003 among the 181 with a school on file
- Record last updated2013 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in California
There are 343 maternal & fetal medicine physician records in California.
All 343 in California → Every provider in Los Angeles → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Paola Aghajanian, M.D.Los Angeles, CA 900481336324334
- Gabriela Dellapiana, M.D.Los Angeles, CA 900481013451673
- Tania Esakoff, M.D.West Hollywood, CA 900481508995986
- Sarah KilpatrickWest Hollywood, CA 900481366455362
- Candace Levian, MDLos Angeles, CA 900481669967956
- Jennifer Lewis, M.D.Los Angeles, CA 900481356880983
- Mariam Naqvi, M.D.West Hollywood, CA 900481386871671
- Lawrence Platt, M.D.Los Angeles, CA 900481275677486
Common questions
What is John Williams III, M.D.'s NPI number?
John Williams III, M.D.'s National Provider Identifier (NPI) is 1205819133, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Williams III, M.D. located?
The NPPES record lists a practice address at 8700 Beverly Blvd., Los Angeles, CA, 90048. Phone: (310) 423-5000. Providers update this record themselves, so call before visiting.
How can I verify John Williams III, M.D.'s license?
NPPES lists California license number G39794, 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.
What is John Williams III, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.