Jonathan F. Williams, D.0.
Gastroenterology Physician · Kenilworth, IL
Jonathan F. Williams, D.0. is a gastroenterology physician with a practice address in Kenilworth, Illinois, and NPI 1013195650, issued on Feb 6, 2008. Check the license (Illinois 036-111829, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jonathan F. Williams
- Credential
- D.0.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036-111829 IL
Self-reported in NPPES; status is on the state search - Practice location
- 510 Green Bay RD, Kenilworth, IL 60043
- Phone
- (847) 256-3400
- Enumerated
- Feb 6, 2008
- Record last updated
- May 31, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (847) 256-3412
- Medicare enrollment
- Enrolled (PECOS I20200624003402); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 510 Green Bay RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yolandra Johnson, MDGastroenterology Physician1326030511
- James Rosenberg, MDInternal Medicine Physician1003818469
Verify Jonathan F. 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 036-111829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average gastroenterology physician in 2024
1,380 Medicare Part D claims for 393 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Omeprazole503 claims
- Pantoprazole Sodium134 claims
- Famotidine73 claims
- Mesalamine47 claims
- Budesonide Dr44 claims
- Linzess39 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.
Industry payments in 2024: $163.62
2 payments; by number, the most common kind was gift; the largest payer was Braintree Laboratories, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Bills Medicare through 2 group practices
- Gastroenterology Consultants OF The North ShoreGlenview, IL
- Mercy Health System CorporationJanesville, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan F. Williams among 887 gastroenterology physician records in Illinois
Jonathan F. Williams, D.0. is one of 887 gastroenterology physician records with a practice address in Illinois. 85% 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 55% of them.
- NPI issued2008 · 55% of these records are older, 39% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2002 · median 2003 among the 643 with a school on file
- Record last updated2013 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 gastroenterology physician records list a practice address in Kenilworth
They are 2 of the 67 NPPES records with a practice address in Kenilworth, and 887 gastroenterology physician records in Illinois.
All 887 in Illinois → Every provider in Kenilworth → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Yolandra Johnson, MDKenilworth, IL 600431326030511
- Hina Omar, MDLake Forest, IL 600451972846871
- Alex Tosiou, M.D.Lake Forest, IL 600451184602732
- Jamie Wabich, M.D.Lake Forest, IL 600451427324425
- Philip Adjei, M.D.Libertyville, IL 600481720080054
- Arkan Alrashid, M.D.Libertyville, IL 600481851348916
- Mohammad Bawani, MDLibertyville, IL 600481407858152
- Robert Hadesman, M.D.Libertyville, IL 600481245234574
Common questions
What is Jonathan F. Williams, D.0.'s NPI number?
Jonathan F. Williams, D.0.'s National Provider Identifier (NPI) is 1013195650, issued on Feb 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan F. Williams, D.0. located?
The NPPES record lists a practice address at 510 Green Bay RD, Kenilworth, IL, 60043. Phone: (847) 256-3400. Providers update this record themselves, so call before visiting.
How can I verify Jonathan F. Williams, D.0.'s license?
NPPES lists Illinois license number 036-111829, 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 Jonathan F. Williams, D.0. prescribe under Medicare Part D?
In 2024, Jonathan F. Williams, D.0. had 1,380 Medicare Part D claims for 393 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.