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

Zachary Callahan, MD

Individual provider Surgery Physician · NPI 1679969067

Zachary Callahan, MD is a General Surgery in Nashville, Tennessee. Graduated from University of Cincinnati College of Medicine in 2015, 11 years ago. Practices with Tennessee Oncology PLLC, a 354-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Tennessee.

Years since qualifying
11
Trained at
University of Cincinnati College of Medicine
Licensed in
TN
In the registry since
2015
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

410 42nd Ave N Ste 400
Nashville, TN 37209-3658
Phone: (615) 329-7887
Fax: (615) 340-4537
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 66510 (TN)

Record details

NPI number1679969067
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 13, 2015
Last updated in NPPESJanuary 5, 2026
Certification dateJanuary 5, 2026

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Tennessee Oncology Pllc — 354 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Other providers in Nashville