Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Daniel Thomas O'Brien, DO

Individual provider Emergency Medicine Physician · NPI 1730678665

Daniel Thomas O'Brien, DO practises Emergency Medicine in Chicago, Illinois. Graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2018, 8 years ago. Practices with Cep America LLC, a 985-clinician group and accepts Medicare assignment. Licensed in Illinois and Indiana.

Years since qualifying
8
Trained at
Kansas City University of Med & Biosciences, College of Osteo Med
Licensed in
IL, IN
In the registry since
2018
Specialties on file
4
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

7435 W Talcott Ave
Chicago, IL 60631
Phone: (773) 792-7921
Show map & directions

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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 036157306 (IL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 125-071881 (IL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 02006688A (IN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1730678665
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 7, 2018
Last updated in NPPESApril 25, 2022
Certification dateApril 25, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolKANSAS CITY UNIVERSITY OF MED & BIOSCIENCES, COLLEGE OF OSTEO MED
Graduated 2018 (8 years in practice)
Group practice Cep America Llc — 985 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Removal of tissue 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 patients699
Services billed 1,061 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Community Hospital Hospital · Munster, IN · listed as Munster Medical Research Foundation Inc

Colleagues at Cep America LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 985 clinicians in the practice; 12 are shown here.

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