Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Tom Klein, MD

Individual provider Internal Medicine Physician · NPI 1326094194

Tom Klein, MD practises Internal Medicine in Riverwoods, Illinois. Qualified in 1976, 50 years ago. Practices with Tamid Medical Group, a 6-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
50
Licensed in
IL, WI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1105 Milwaukee Ave
Riverwoods, IL 60015-3512
Phone: (847) 325-5110
Fax: (847) 325-5114
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 3825 N Central Ave, Chicago, IL 60634-2719 — (847) 325-5110
  • N2460 Geneva Street, Lake Geneva, WI 53147 — (847) 325-5110

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036065537 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4193020 (WI)

Record details

NPI number1326094194
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 25, 2006
Last updated in NPPESDecember 3, 2024
Certification dateDecember 3, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Group practice Tamid Medical Group — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients403
Services billed 2,920 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Education $111 1 payment · educational material or training, not a fee
Food and Beverage $48 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Tamid Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Riverwoods