Daniel Williams
Emergency Medicine Physician · Olympia Fields, IL
Daniel Williams is an emergency medicine physician with a practice address in Olympia Fields, Illinois, and NPI 1790956779, issued on Mar 18, 2008. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Daniel Williams
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 02003228A IN
Self-reported in NPPES; status is on the state search - Practice location
- 20201 Crawford Ave, Olympia Fields, IL 60461
- Phone
- (800) 458-6253
- Enumerated
- Mar 18, 2008
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090926000092); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 20201 Crawford Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marwa Abdul BasithStudent in an Organized Health Care Education/Training Program1215870654
- Veronica Abegunde, MDHospitalist Physician1740500826
- Amir Abusharif, DOStudent in an Organized Health Care Education/Training Program1619663986
- Gremah Adam Aboubacar, DOStudent in an Organized Health Care Education/Training Program1619662392
- Tejaswini Addanki, DOStudent in an Organized Health Care Education/Training Program1306589163
- Saria Adnan Sultan, DOInternal Medicine Physician1679216196
Verify Daniel Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average emergency medicine physician in 2024
170 Medicare Part D claims for 140 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin30 claims
- Ibuprofen13 claims
- Prednisone12 claims
- Amoxicillin-Clavulanate Potass11 claims
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.
Bills Medicare through one group practice
- Permanente Medical Group IncRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Williams among 3,291 emergency medicine physician records in Illinois
Daniel Williams 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 2008, is newer than 39% of them.
- NPI issued2008 · 39% of these records are older, 56% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2005 · median 2012 among the 1,867 with a school on file
- Record last updated2021 · 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).
58 emergency medicine physician records list a practice address in Olympia Fields
They are 58 of the 684 NPPES records with a practice address in Olympia Fields, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Olympia Fields → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- April Brill, D.O.Olympia Fields, IL 604611396984324
- Christopher Colbert, DOOlympia Fields, IL 604611255444915
- Christina Deangelis, D.O.Olympia Fields, IL 604611942449715
- Sarah Green, DOOlympia Fields, IL 604611407849938
- Thomas Green, DOOlympia Fields, IL 604611689668808
- Brian Haag, M.D.Olympia Fields, IL 604611790732949
- Joanna Jackson, D.O.Olympia Fields, IL 604611841430139
- Martha Kelley, D.O.Olympia Fields, IL 604611942279252
Common questions
What is Daniel Williams's NPI number?
Daniel Williams's National Provider Identifier (NPI) is 1790956779, issued on Mar 18, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Williams located?
The NPPES record lists a practice address at 20201 Crawford Ave, Olympia Fields, IL, 60461. Phone: (800) 458-6253. Providers update this record themselves, so call before visiting.
How can I verify Daniel Williams's license?
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 Daniel Williams prescribe under Medicare Part D?
In 2024, Daniel Williams had 170 Medicare Part D claims for 140 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.