Christopher Callahan, MD
Christopher Callahan, MD holds NPI 1104867043, with a primary taxonomy of geriatric medicine (internal medicine) physician and a practice location in Indianapolis, IN. The number was issued on June 10, 2006 and the NPPES record was last updated on September 15, 2025. The record lists 2 taxonomy codes. One additional practice location is listed.
Taxonomies and licenses
| Taxonomy | Code | License |
|---|---|---|
| Geriatric Medicine (Internal Medicine) Physician Primary | 207RG0300X | 01036319A (IN) |
| Internal Medicine Physician | 207R00000X | 01036319A (IN) |
Practice locations
Local context
Active NPPES records list 53 providers with geriatric medicine (internal medicine) physician as the primary taxonomy within 25 miles of this practice location's ZIP code, 44 of them within 10 miles.
The same primary taxonomy is listed by 89 in Indiana and 6,409 nationwide.
These are counts from NPPES records, not a ranking or recommendation. Distances are measured between ZIP code centers, not street addresses.
Other providers at this address
- Adnan Arseven, MD (Geriatric Medicine (Internal Medicine) Physician)
- Austin Blais, MD (Psychiatry Physician)
- Bhaskar David Bose, MD (Hospice and Palliative Medicine (Family Medicine) Physician)
- Christina Vojtek, MD (Infectious Disease Physician)
- Christopher Kniese, MD (Critical Care Medicine (Internal Medicine) Physician)
- Clarissa Hanna, MD (Anesthesiology Physician)
- Danielle Bain, MD (Diagnostic Radiology Physician)
- David Galginaitis (Anesthesiology Physician)
- Douglass Hale, MD (Obstetrics & Gynecology Physician)
- Garrett Owens, MD (Emergency Medicine Physician)
Providers whose NPPES practice location has the same street address, listing those with a page here.
Nearby providers with the same primary taxonomy
- Adnan Arseven, MD , Indianapolis, IN, same ZIP code
- Glenda Westmoreland, MD , Indianapolis, IN, same ZIP code
- Greg Sachs, MD , Indianapolis, IN, same ZIP code
- Jennifer Carnahan, MD , Indianapolis, IN, same ZIP code
- Kathleen Unroe, MD , Indianapolis, IN, same ZIP code
- Kofi Quist, MD , Indianapolis, IN, same ZIP code
- Malaz Boustani, MD , Indianapolis, IN, same ZIP code
- Meredith Greene, MD , Indianapolis, IN, same ZIP code
Record history
- Name on record
- Christopher M Callahan
- Status
- Active
- NPI issued
- Last updated in NPPES
Is this your record? Updates are made through NPPES, the official National Plan and Provider Enumeration System.
NPPES data as of · Source: CMS NPPES
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