STEPHEN TODD CALLAHAN MD, MPH
NPI 1104913219
Internal Medicine - Adolescent Medicine in Nashville, TN
About Stephen Todd Callahan Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN TODD CALLAHAN MD, MPH (NPI 1104913219) is an individual adolescent medicine provider in Nashville, Tennessee, licensed in Tennessee (MD36557) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Nashville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Stephen Todd Callahan Md, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Stephen Callahan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Nashville, TN 37232
- Reassigned Medicare billing, Tennessee enrollment
- 4,711 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Stephen Callahan's NPI number?
The NPI number for Stephen Callahan is 1104913219. It was assigned to this individual provider in the NPPES registry on October 9, 2006.
Where is Stephen Callahan located?
Stephen Callahan practices at 3601 Tvc, Nashville, TN 37232. The listed phone number is (615) 322-3000.
What is Stephen Callahan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Adolescent Medicine, with taxonomy code 207RA0000X.
Is Stephen Callahan enrolled in Medicare?
Yes. Stephen Callahan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Stephen Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Callahan reassigns Medicare benefits to Vanderbilt University Medical Center (Nashville, TN). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Callahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stephen Callahan accept?
Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama and Ambetter of North Carolina and 4 other insurers list Stephen Callahan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Stephen Callahan was last updated on March 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Stephen Todd Callahan, MD, MPH · NPI 1104913219
Adolescent Medicine physician in Nashville, Tennessee. Individual provider, active in the CMS NPPES registry since October 9, 2006.
## Identity
- **NPI:** 1104913219 (Entity type: Individual)
- **Enumerated:** October 9, 2006
- **Primary specialty:** Internal Medicine - Adolescent Medicine · taxonomy 207RA0000X
- **State license:** MD36557 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 3601 TVC, Nashville, TN 37232-0001
- **Phone:** (615) 322-3000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Vanderbilt University Medical Center (NPI 1104202761, Nashville, TN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 18, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1104913219) · Data from the CMS NPPES public registry.