Clin Pharmacol Ther
Antineoplastic AgentsExome SequencingPharmacogenetics
Dr. John Thomas Callaghan, MD, PhD
NPI1700825064PAC ID5092714204
- Part D claims, 2022
- 150
- Publications
- 16
- Hospital affiliations
- 1
- Industry payments
- $98
- Medical groups
- 2
- Practice address
- 1701 N Senate Blvd, Indianapolis, IN 46202
- Practice phone
- Call (317) 962-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Callaghan's professional email, personal email and mobile number
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Dr. John Thomas Callaghan is an internist in Indianapolis, Indiana
Dr. Callaghan practices at IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health.
Dr. Callaghan's NPI, 1700825064, was assigned on June 5, 2006. Dr. Callaghan graduated from University of Kentucky College of Medicine in 1969. Dr. Callaghan holds Indiana license 01028895A.
NPI and contact details
- NPI
- 1700825064NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092714204
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (317) 962-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 83
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Thomas Callaghan practices at IU Health Methodist Hospital in Indianapolis, Indiana
Dr. Callaghan's primary practice is IU Health Methodist Hospital, at 1701 N Senate Blvd, Indianapolis, IN 46202 in Marion County. The practice phone is (317) 962-2000.
- IU Health Methodist Hospital1701 N Senate Blvd, Indianapolis, IN 46202 · Marion CountyPhone(317) 962-2000
Source: Dmand AI Affiliation Data
Dr. John Thomas Callaghan is affiliated with 4 sites of care and 2 medical groups
Dr. Callaghan's primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. The medical group on file is IU Health Medical Group. Dmand AI also links Dr. Callaghan to 2 more group practices and clinics, 1 behavioral health center and 1 medical group, each named with a free account.
IU Health Medical Group2 group practices and clinicsNames with a free account1 behavioral health centerName with a free account1 medical groupName with a free account
See all 6 affiliations for Dr. CallaghanSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Thomas Callaghan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Callaghan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| IU Health Methodist Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Thomas Callaghan is one of 1,987 internists in Indiana
Internal medicine is Dr. Callaghan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Callaghan is licensed in Indiana.
Specialties and state licenses
- Internal medicine, IndianaPrimary
Internists near Dr. Callaghan
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
1,987internists in Indiana720internists in Indianapolis250internists at IU Health Methodist Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Thomas Callaghan's patients have a median age of 45
Across all payers, Dmand AI patient panel data puts Dr. Callaghan's median patient age at 45, with 81% women.
Dr. Callaghan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women81%
- Men14%
Source: Dmand AI Patient Panel Data
Dr. John Thomas Callaghan wrote 150 Medicare Part D claims in 2022
In 2022, Dr. Callaghan wrote 150 Medicare Part D claims. They cover 1 drug, with $1,544 in total drug cost.
Part D claims, 2022150
Drugs named by CMS1
Total drug cost$1,544
Dr. Callaghan's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. John Thomas Callaghan takes part in Medicare
Dr. Callaghan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John Thomas Callaghan has 16 publications on record
Dmand AI links 16 papers to Dr. Callaghan, published from 2012 to 2025. 2016 was the busiest year, with 2. The most frequent topics are Pharmacogenomic Testing, Pharmacogenetics and Genotype. Dr. Callaghan has published most often in Clin Pharmacol Ther. Dr. Callaghan's most frequent co-authors are Michael Thomas Eadon, MD, Paul R. Dexter, MD and Bryan P. Schneider, MD.
Papers16
Years published2012 to 2025
Dr. Callaghan's papers by year, 2015 to 2025
Topics Dr. Callaghan writes about most
- Pharmacogenomic Testing
- Pharmacogenetics
- Genotype
- Precision Medicine
- Academic Medical Centers
- Analgesics, Opioid
- Cytochrome P-450 CYP2D6
- Genetic Variation
Dr. Callaghan's most frequent co-authors
- Michael Thomas Eadon, MD4 shared papers
- Paul R. Dexter, MD3 shared papers
- Bryan P. Schneider, MD3 shared papers
Recent publications by Dr. Callaghan
Clin Pharmacol Ther
Academic Medical CentersIndianaPharmacogenetics
Pharmacogenomics J
AripiprazoleDrug-Related Side Effects and Adverse ReactionsNorepinephrine
Clin Pharmacol Ther
Analgesics, OpioidCatechol O-MethyltransferaseCytochrome P-450 CYP2D6
See who Dr. Callaghan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Callaghan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Thomas Callaghan received $98 in industry payments from 2021 to 2023
CMS Open Payments shows 5 general payments to Dr. Callaghan from 1 drug or device company from 2021 to 2023. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $98.
General payments to Dr. Callaghan by program year, 2021 to 2023
Companies that paid Dr. Callaghan the most, 2021 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Thomas Callaghan graduated from University of Kentucky College of Medicine
Dr. Callaghan graduated from University of Kentucky College of Medicine in 1969.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Thomas Callaghan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Thomas Callaghan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Thomas Callaghan's NPI number?
Dr. John Thomas Callaghan's NPI number is 1700825064. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Thomas Callaghan?
Dr. John Thomas Callaghan is an internist in Indianapolis, Indiana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Thomas Callaghan practice?
Dr. Callaghan practices at 1701 N Senate Blvd, Indianapolis, IN 46202. Dr. Callaghan's primary practice is IU Health Methodist Hospital in Indianapolis, Indiana, part of Indiana University Health. Dmand AI also links Dr. Callaghan to 2 group practices and clinics, 1 behavioral health center and 1 medical group.
What is Dr. John Thomas Callaghan's office phone number?
The practice phone on file for Dr. Callaghan is (317) 962-2000.
What is Dr. John Thomas Callaghan's medical license number?
Dr. Callaghan holds Indiana license 01028895A.
Which hospitals is Dr. John Thomas Callaghan affiliated with?
Dr. Callaghan practices at IU Health Methodist Hospital in Indianapolis, Indiana.
What medical group is Dr. John Thomas Callaghan part of?
Dr. Callaghan is linked to IU Health Medical Group. Dmand AI links Dr. Callaghan to 1 more medical group.
Does Dr. John Thomas Callaghan accept Medicare?
Yes. CMS lists Dr. Callaghan as accepting Medicare assignment.
Where did Dr. John Thomas Callaghan go to medical school?
Dr. Callaghan graduated from University of Kentucky College of Medicine in 1969.
What drugs does Dr. John Thomas Callaghan prescribe most?
In 2022 Medicare Part D data, Dr. Callaghan's most prescribed drugs by claims were Paxlovid (Eua).
Show 4 more questionsShow fewer questions
Has Dr. John Thomas Callaghan received payments from drug or device companies?
CMS Open Payments shows $98 in general payments to Dr. Callaghan from 1 company from 2021 to 2023. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. John Thomas Callaghan been practicing?
Dr. Callaghan graduated from medical school in 1969, 57 years ago.
Does Dr. John Thomas Callaghan do research?
Dmand AI links 16 publications to Dr. Callaghan, published from 2012 to 2025.
Who does Dr. John Thomas Callaghan publish with?
Dr. Callaghan's most frequent co-authors are Michael Thomas Eadon, MD (4 shared papers), Paul R. Dexter, MD (3 shared papers) and Bryan P. Schneider, MD (3 shared papers).
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