Quick answers
- Does Gregory S. Felzien accept Medicare assignment?
- Medicare's clinician data says Gregory S. Felzien may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Gregory S. Felzien's NPI number?
- 1811971625. 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 Gregory S. Felzien is enrolled with Medicare (CMS data updated October 2, 2026).
- 3350 Breckinridge Blvd, Suite 200Duluth, GA 30096 (770) 962‑8396
- 523 Church StDecatur, GA 30030 (404) 589‑9040
Group practices
Medicare enrollment lists Gregory S. Felzien as a member of this group (CMS data updated October 2, 2026).
- Positive Impact Health Centers Inc26 clinicians in the group
Specialties
- Infectious Diseaseprimary
- Internal Medicinealso
Other infectious disease doctors in Georgia
Clinicians with the same Medicare primary specialty in Georgia — not a recommendation.
Other clinicians in Positive Impact Health Centers Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1811971625 |
| 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