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

Mr. Thomas Mark

Individual provider Physician Assistant · NPI 1255577649

Mr. Thomas Mark is a Physician Assistant in Elgin, Illinois. Qualified in 2008, 18 years ago. Practices with Prime Healthcare Illinois Medical Group LLC, a 281-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
18
Licensed in
IL
In the registry since
2009
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Practice location Address checks out

370 Summit St
Elgin, IL 60120-3843 Not confirmed with CMS for 17 years — call before visiting
Phone: (847) 608-1344
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 085003372 (IL)

Record details

NPI number1255577649
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJanuary 6, 2009
Last updated in NPPESJanuary 6, 2009

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Prime Healthcare Illinois Medical Group Llc — 281 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients360
Services billed 763 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.

Practises at

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

Colleagues at Prime Healthcare Illinois Medical Group LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 281 clinicians in the practice; 12 are shown here.

Other providers in Elgin