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

Charles Leo Callaghan, MD

Individual provider Internal Medicine Physician · NPI 1649369489

Charles Leo Callaghan, MD practises Internal Medicine in Saint Paul, Minnesota. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1993, 33 years ago. Practices with Healtheast Medical Research Institute, a 678-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Minnesota.

Years since qualifying
33
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
MN
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

17 W Exchange St Ste 420
Saint Paul, MN 55102 Not confirmed with CMS for 19 years — call before visiting
Phone: (651) 232-4125
Fax: (651) 232-4127
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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 37316 (MN)

Record details

NPI number1649369489
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 12, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Group practice Healtheast Medical Research Institute — 678 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 patients241
Services billed 4,085 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.

Colleagues at Healtheast Medical Research Institute

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 678 clinicians in the practice; 12 are shown here.

Other providers in Saint Paul