John Kevin Base, MD
Internal Medicine Physician · Chicago, IL
John Kevin Base, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1881425650, issued on Aug 12, 2024. 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
- John Kevin Base
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 1950 W Polk St FL 6, Chicago, IL 60612
- Phone
- (312) 864-7311
- Enumerated
- Aug 12, 2024
- Entity
- Type 1 · individual
Also registered at 1950 W Polk St FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Kevin Base 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
3,291 internal medicine physician records list a Chicago practice address
They are 3,291 of the 63,379 NPPES records with a Chicago practice address, and 8,522 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,291 in Chicago → All 8,522 in Illinois → Every provider in Chicago →
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Common questions
What is John Kevin Base, MD's NPI number?
John Kevin Base, MD's National Provider Identifier (NPI) is 1881425650, issued on Aug 12, 2024. An NPI identifies a provider in billing; it is not a license.
Where is John Kevin Base, MD located?
The NPPES record lists a practice address at 1950 W Polk St FL 6, Chicago, IL, 60612. Phone: (312) 864-7311. Providers update this record themselves, so call before visiting.
How can I verify John Kevin Base, MD'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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.