Thomas R. Klein, MD
Adult Medicine Physician · Chicago, IL
Thomas R. Klein, MD is an adult medicine physician with a practice address in Chicago, Illinois, and NPI 1588776017, issued on Aug 31, 2006. Check the license (Illinois 036059654, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas R. Klein
- Credential
- MD
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- 036059654 IL
Self-reported in NPPES; status is on the state search - Practice location
- 711 W North Ave, Chicago, IL 60610
- Phone
- (312) 280-0996
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (312) 280-8789
- Medicaid ID
- 036059654 IL
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 72 in Illinois → Look up another NPI →
Also registered at 711 W North Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas R. 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 036059654Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average adult medicine physician in 2024
98 Medicare Part D claims for 12 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D.
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.
Thomas R. Klein among 72 adult medicine physician records in Illinois
Thomas R. Klein, MD is one of 72 adult medicine physician records with a practice address in Illinois. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 53% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · 42% of these records are
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in Illinois
There are 72 adult medicine physician records in Illinois.
All 72 in Illinois → Every provider in Chicago → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Ross Slotten, MDChicago, IL 606101619089174
- Roberto Diaz, MDChicago, IL 606081255462578
- Gloria Osei-Tutu, APRNChicago, IL 606081649039520
- Sunali Singh, M.D.Chicago, IL 606121124077854
- Mitchele Hogan, MDChicago, IL 606071063507127
- Sandra Valdez, RNChicago, IL 606071538088745
- Brandi AdkinsChicago, IL 606061164370250
- Gary Bucher, MDChicago, IL 606141770664856
Common questions
What is Thomas R. Klein, MD's NPI number?
Thomas R. Klein, MD's National Provider Identifier (NPI) is 1588776017, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas R. Klein, MD located?
The NPPES record lists a practice address at 711 W North Ave, Chicago, IL, 60610. Phone: (312) 280-0996. Providers update this record themselves, so call before visiting.
How can I verify Thomas R. Klein, MD's license?
NPPES lists Illinois license number 036059654, 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.
How much does Thomas R. Klein, MD prescribe under Medicare Part D?
In 2024, Thomas R. Klein, MD had 98 Medicare Part D claims for 12 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.