Ronald W. Schaefer, M.D.
Internal Medicine Physician · Sheridan, IL
Ronald W. Schaefer, M.D. is an internal medicine physician with a practice address in Sheridan, Illinois, and NPI 1366644502, issued on Jun 1, 2007. Check the license on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ronald W. Schaefer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 4017 E 2603RD RD, Sheridan, IL 60551
- Phone
- (773) 343-2164
- Enumerated
- Jun 1, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (815) 786-2067
- Entity
- Type 1 · individual
Also registered at 4017 E 2603RD RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald W. Schaefer 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
Internal Medicine Physician providers in Illinois
There are 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other internal medicine physician records in Illinois
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Common questions
What is Ronald W. Schaefer, M.D.'s NPI number?
Ronald W. Schaefer, M.D.'s National Provider Identifier (NPI) is 1366644502, issued on Jun 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald W. Schaefer, M.D. located?
The NPPES record lists a practice address at 4017 E 2603RD RD, Sheridan, IL, 60551. Phone: (773) 343-2164. Providers update this record themselves, so call before visiting.
How can I verify Ronald W. Schaefer, M.D.'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.
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.