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

Dr. Thomas Colin Killeen, DO

Individual provider Internal Medicine Physician · NPI 1306093653

Dr. Thomas Colin Killeen, DO practises Internal Medicine in Cleveland, Ohio. Graduated from Michigan State University College of Osteopathic Medicine in 2008, 18 years ago. Practices with Cleveland Clinic, a 6,935-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Ohio.

Years since qualifying
18
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
OH
In the registry since
2008
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

9500 Euclid Ave G10
Cleveland, OH 44195-0001 Not confirmed with CMS for 10 years — call before visiting
Phone: (216) 444-9896
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 34.012362 (OH)

Record details

NPI number1306093653
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedAugust 19, 2008
Last updated in NPPESJuly 25, 2016

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2008 (18 years in practice)
Group practice Cleveland Clinic — 6935 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients213
Services billed 748 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Cleveland Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 6935 clinicians in the practice; 12 are shown here.

Other providers in Cleveland