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

John Thomas Callaghan, MD, PHD

Individual provider Clinical Pharmacology Physician · NPI 1700825064

John Thomas Callaghan, MD, PHD is an Internal Medicine in Indianapolis, Indiana. Graduated from University of Kentucky College of Medicine in 1969, 57 years ago. Practices with Iu Health Medical Group, LLC, a 4,351-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
57
Trained at
University of Kentucky College of Medicine
Licensed in
IN
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1481 W 10th St
Indianapolis, IN 46202-2803
Phone: (317) 988-2624
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1701 N Senate Blvd, Indianapolis, IN 46202-1239 — (888) 484-3258

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 01028895A (IN)
Clinical Pharmacology Physician Taxonomy 208U00000X · Licence 01028895 (IN)
Clinical Pharmacology Physician Taxonomy 208U00000X · Licence 01028895A (IN)

Record details

NPI number1700825064
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedJune 5, 2006
Last updated in NPPESMarch 4, 2025
Certification dateMarch 4, 2025
Mailing address1481 W 10th St, Indianapolis, IN 46202-2803

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF KENTUCKY COLLEGE OF MEDICINE
Graduated 1969 (57 years in practice)
Group practice Iu Health Medical Group, Llc — 4351 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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