Jon Paul Klein, MD
Internal Medicine Physician · Chicago, IL
Jon Paul Klein, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1972265593, issued on Oct 11, 2021. Check the license (Illinois 125086229, 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
- Jon Paul Klein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 125086229 IL
Self-reported in NPPES; status is on the state search - Practice location
- 240 E Huron St # 1-200, Chicago, IL 60611
- Phone
- (312) 503-7975
- Enumerated
- Oct 11, 2021
- Record last updated
- Jun 23, 2025
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 240 E Huron St # 1-200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Olamide Adebayo, MPHStudent in an Organized Health Care Education/Training Program1275301145
- Parul Goyal, MDDermatology Physician1831582469
- Dannielle Grayer, MDInternal Medicine Physician1548754674
- Iretiola HamzatStudent in an Organized Health Care Education/Training Program1538772538
- Madison LuceStudent in an Organized Health Care Education/Training Program1043044365
- Eric Morell, M.D.Anesthesiology Physician1790041382
Verify Jon Paul Klein 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 125086229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Jon Paul Klein among 7,238 internal medicine physician records in Illinois
Jon Paul Klein, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 2021, is newer than 74% of them.
- NPI issued2021 · 74% of these records are older, 22% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2025 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kenneth Arbetter, MDChicago, IL 606111336132851
- Steven Gallo, MDChicago, IL 606111548253024
- Arnold Grauer, MDChicago, IL 606111619960184
- James Hall, MDChicago, IL 606111649263153
- Frances Langdon, MDChicago, IL 606111063405546
- Michael Lee, MDChicago, IL 606111942293451
- Hazel Manzano, MDChicago, IL 606111801889316
- Chadwick Milstead, MDChicago, IL 606111740273259
Common questions
What is Jon Paul Klein, MD's NPI number?
Jon Paul Klein, MD's National Provider Identifier (NPI) is 1972265593, issued on Oct 11, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jon Paul Klein, MD located?
The NPPES record lists a practice address at 240 E Huron St # 1-200, Chicago, IL, 60611. Phone: (312) 503-7975. Providers update this record themselves, so call before visiting.
How can I verify Jon Paul Klein, MD's license?
NPPES lists Illinois license number 125086229, 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.