Quick answers
- Does Zachary T. Tierney accept Medicare assignment?
- Medicare's clinician data says Zachary T. Tierney may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Zachary T. Tierney's NPI number?
- 1609562966. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Zachary T. Tierney is enrolled with Medicare (CMS data updated October 2, 2026).
- 4835 Lbj Fwy, Suite 900Dallas, TX 75244
- 6400 Fieldcrest DrFort Smith, AR 72916
- 8 Oak Park DrBedford, MA 01730
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Dallas
Clinicians with the same Medicare primary specialty in Dallas, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arkansas College Of Medicine |
| Graduation year | 2023 (3 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1609562966 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians