William S. Renk, MD
Pediatrics Physician · Rockford, IL
William S. Renk, MD is a pediatrics physician with a practice address in Rockford, Illinois, and NPI 1275635211, issued on Sep 1, 2006. Check the license (Illinois 036112868, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William S. Renk
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 036112868 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3505 North Bell School Road, Rockford, IL 61114
- Phone
- (779) 696-0300
- Enumerated
- Sep 1, 2006
- Record last updated
- May 5, 2023
- Medicaid ID
- 036112868 IL
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 3505 North Bell School Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kaneez Ali, MDObstetrics & Gynecology Physician1043536477
- Jurate Bucha, M.D.Internal Medicine Physician1760705834
- Timothy Durkee, MD, PHDObstetrics & Gynecology Physician1780682393
- Tiffanie Ferry, M.D.Family Medicine Physician1538105093
- Andrew Geddes, MDPediatrics Physician1992807002
- Kendra Hall, M.D.Pediatrics Physician1548251432
Verify William S. Renk 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 036112868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William S. Renk among 3,176 pediatrics physician records in Illinois
William S. Renk, MD is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileNo · 32% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Illinois
There are 3,176 pediatrics physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,176 in Illinois → Every provider in Rockford → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Palanikumar Balasundaram, MDRockford, IL 611141881180412
- Gabriella Fuchs, MDRockford, IL 611141164957395
- Andrew Geddes, MDRockford, IL 611141992807002
- Kendra Hall, M.D.Rockford, IL 611141548251432
- Amna MousaRockford, IL 611141578298469
- Romulo Ortega, MDLoves Park, IL 611111194835389
- Antonio Baluga, MDRockford, IL 611081740290600
- Ronald Grant, MDRockford, IL 611081558476291
Common questions
What is William S. Renk, MD's NPI number?
William S. Renk, MD's National Provider Identifier (NPI) is 1275635211, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William S. Renk, MD located?
The NPPES record lists a practice address at 3505 North Bell School Road, Rockford, IL, 61114. Phone: (779) 696-0300. Providers update this record themselves, so call before visiting.
How can I verify William S. Renk, MD's license?
NPPES lists Illinois license number 036112868, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.