Diana R. Williams, M.D.
Emergency Medicine Physician · Berwyn, IL
Diana R. Williams, M.D. is an emergency medicine physician with a practice address in Berwyn, Illinois, and NPI 1508881905, issued on Jul 13, 2006. Check the license (Illinois 036-081239, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Diana R. Williams
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036-081239 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3249 Oak Park Ave, Berwyn, IL 60402
- Phone
- (708) 783-9100
- Enumerated
- Jul 13, 2006
- Record last updated
- Jun 12, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 036081239 IL
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 3249 Oak Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gholamali Afshang, MDDiagnostic Radiology Physician1316925522
- Sumayyah Ahmed, PA-CPhysician Assistant1851084206
- Michelle Akan, CRNACertified Registered Nurse Anesthetist1376808683
- Angela Alcarraz Bedrillana, MDInternal Medicine Physician1033813720
- Haris Aleem, MDHospitalist Physician1063409795
- John Alexis, M.D.Emergency Medicine Physician1689608713
Verify Diana R. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-081239Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average emergency medicine physician in 2024
58 Medicare Part D claims for 45 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Diana R. Williams among 3,291 emergency medicine physician records in Illinois
Diana R. Williams, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2020 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 emergency medicine physician records list a practice address in Berwyn
They are 19 of the 1,031 NPPES records with a practice address in Berwyn, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Berwyn → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- John Alexis, M.D.Berwyn, IL 604021689608713
- Chandler Barnes, M.D.Stickney, IL 604021013938554
- Rhodessa Capulong, M.D.Berwyn, IL 604021992720353
- Carlos Castaneda, MDBerwyn, IL 604021053368878
- Paul Faine, M.D.Berwyn, IL 604021033136577
- Kenneth Heinrich, M.D.Berwyn, IL 604021891711743
- Judith Jean-Baptiste, M.D.Berwyn, IL 604021295750602
- Zebaa Kalimullah, MDBerwyn, IL 604021982643540
Common questions
What is Diana R. Williams, M.D.'s NPI number?
Diana R. Williams, M.D.'s National Provider Identifier (NPI) is 1508881905, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diana R. Williams, M.D. located?
The NPPES record lists a practice address at 3249 Oak Park Ave, Berwyn, IL, 60402. Phone: (708) 783-9100. Providers update this record themselves, so call before visiting.
How can I verify Diana R. Williams, M.D.'s license?
NPPES lists Illinois license number 036-081239, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diana R. Williams, M.D. prescribe under Medicare Part D?
In 2024, Diana R. Williams, M.D. had 58 Medicare Part D claims for 45 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.