Quick answers
- Where does Tammy S. Mackiewicz see patients?
- Medicare's clinician data lists 2 practice locations, including Sebring, FL and Trinity, FL. Call before your visit to confirm the address.
- What is Tammy S. Mackiewicz's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Tammy S. Mackiewicz accept Medicare assignment?
- Yes. Medicare's clinician data says Tammy S. Mackiewicz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Tammy S. Mackiewicz?
- (863) 385-1244, as listed in official Medicare / NPI Registry data.
- What is Tammy S. Mackiewicz's NPI number?
- 1790054252. 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 Tammy S. Mackiewicz is enrolled with Medicare (CMS data updated 2026-10-02).
- 1396 Whisper CirSebring, FL 33870 (863) 385‑1244
- 9320 State Rd, Suite 54Trinity, FL 34655 (727) 842‑8411
Group practices
Medicare enrollment lists Tammy S. Mackiewicz as a member of this group (CMS data updated 2026-10-02).
- Florida Cancer Specialists and Research Institute, LLC498 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Sebring
Clinicians with the same Medicare primary specialty in Sebring, FL — not a recommendation.
Clinician information
| Graduation year | 2011 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790054252 |
| 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 2026-10-02, retrieved 2026-10-29
- 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