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

Mark Giacomin, DO

Individual provider Emergency Medicine Physician · NPI 1215948153

Mark Giacomin, DO practises Emergency Medicine in Barrington, Illinois. Graduated from Chicago College of Osteopathy in 1991, 35 years ago. Practices with Tri-County Emergency Physicians Ltd, an 18-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
35
Trained at
Chicago College of Osteopathy
Licensed in
IL
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

450 W Highway 22
Barrington, IL 60010-1919
Phone: (847) 381-9600
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036086637 (IL)

Record details

NPI number1215948153
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedAugust 9, 2006
Last updated in NPPESDecember 31, 2021
Certification dateDecember 31, 2021

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolCHICAGO COLLEGE OF OSTEOPATHY
Graduated 1991 (35 years in practice)
Group practice Tri-County Emergency Physicians Ltd — 18 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 patients755
Services billed 1,357 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

Colleagues at Tri-County Emergency Physicians Ltd

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 18 clinicians in the practice; 9 are shown here.

Other providers in Barrington