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

Isaac Thomas, MD

Individual provider Cardiovascular Disease Physician · NPI 1083662894

Isaac Thomas, MD is registered under Cardiovascular Disease (Cardiology) in Gurnee, Illinois. Qualified in 1979, 47 years ago. Practices with Froedtert South Inc, a 156-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
47
Licensed in
IL, WI
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

222 S Greenleaf St Ste 109
Gurnee, IL 60031-5705
Phone: (847) 336-1600
Fax: (847) 336-2380
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 10256 Old Green Bay Rd, Pleasant Prairie, WI 53158-2814 — (847) 336-1600

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 13522 (WI)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 036.063274 (IL)
Specialist Taxonomy 174400000X · Licence 036063274 (IL)

Record details

NPI number1083662894
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2006
Last updated in NPPESMay 8, 2026
Certification dateMay 8, 2026

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 1979 (47 years in practice)
Group practice Froedtert South Inc — 156 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Pacemaker insertion or repair 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients871
Services billed 3,016 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Food and Beverage $1,343 55 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.

Colleagues at Froedtert South Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 156 clinicians in the practice; 12 are shown here.

Other providers in Gurnee