Gretchen Kathleen Williams, D.O
Surgery Physician · Kankakee, IL
Gretchen Kathleen Williams, D.O is a surgery physician with a practice address in Kankakee, Illinois, and NPI 1659663581, issued on May 11, 2011. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gretchen Kathleen Williams
- Credential
- D.O
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 5101019120 MI
Self-reported in NPPES; status is on the state search - Practice location
- 400 N Wall St Ste B410, Kankakee, IL 60901
- Phone
- (815) 933-2221
- Enumerated
- May 11, 2011
- Record last updated
- Feb 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (815) 933-3975
- Medicare enrollment
- Enrolled (PECOS I20160919002554); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 2011
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 1,520 in Illinois → Look up another NPI →
Also registered at 400 N Wall St Ste B410
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vinay Bajaj, M.D.Surgery Physician1619325446
- Aline Dang, DOSurgery Physician1316394430
- Steven GroeneSurgery Physician1407175318
- Kay Timbers, MDSurgery Physician1528334208
Verify Gretchen Kathleen 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
49% fewer Medicare Part D claims than the average surgery physician in 2024
75 Medicare Part D claims for 55 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen28 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: $1,559.70
5 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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 one group practice
- Riverside Health SystemWillmington, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gretchen Kathleen Williams among 1,520 surgery physician records in Illinois
Gretchen Kathleen Williams, D.O is one of 1,520 surgery physician records with a practice address in Illinois. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 53% of them.
- NPI issued2011 · 53% of these records are older, 45% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2011 · median 2004 among the 650 with a school on file
- Record last updated2021 · 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 208600000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 surgery physician records list a practice address in Kankakee
They are 12 of the 555 NPPES records with a practice address in Kankakee, and 1,520 surgery physician records in Illinois.
All 1,520 in Illinois → Every provider in Kankakee → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Vinay Bajaj, M.D.Kankakee, IL 609011619325446
- Robert Brockman, MDKankakee, IL 609011437115722
- Jeffrey Brown, MDKankakee, IL 609011629092937
- Jesse Coleman, DOKankakee, IL 609011720570971
- Aline Dang, DOKankakee, IL 609011316394430
- Steven GroeneKankakee, IL 609011407175318
- Julian Henderson, MDKankakee, IL 609011700377033
- Dong Kim, M.D.Kankakee, IL 609011104938984
Common questions
What is Gretchen Kathleen Williams, D.O's NPI number?
Gretchen Kathleen Williams, D.O's National Provider Identifier (NPI) is 1659663581, issued on May 11, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Kathleen Williams, D.O located?
The NPPES record lists a practice address at 400 N Wall St Ste B410, Kankakee, IL, 60901. Phone: (815) 933-2221. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Kathleen Williams, D.O'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 Gretchen Kathleen Williams, D.O prescribe under Medicare Part D?
In 2024, Gretchen Kathleen Williams, D.O had 75 Medicare Part D claims for 55 beneficiaries; the average among surgery physician prescribers was 147. 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.