Quick answers
- Does Portia Siwawa accept Medicare assignment?
- Yes. Medicare's clinician data says Portia Siwawa accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Portia Siwawa's NPI number?
- 1215220488. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Portia Siwawa works
Medicare's Facility Affiliation Data lists Portia Siwawa at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Piedmont Rockdale HospitalConyers, GA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 110091
- Southern Regional Medical CenterRiverdale, GA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 110165
Practice locations
Addresses where Portia Siwawa is enrolled with Medicare (CMS data updated October 2, 2026).
- 11 Upper Riverdale Rd SW, Women'S CenterRiverdale, GA 30274 (770) 991‑8000
- 1968 Peachtree NW RdAtlanta, GA 30309 (404) 605‑5000
Group practices
Medicare enrollment lists Portia Siwawa as a member of these groups (CMS data updated October 2, 2026).
- Piedmont Providers LLC530 clinicians in the group
- Southern Regional Physicians Management Group, LLC26 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Riverdale
Clinicians with the same Medicare primary specialty in Riverdale, GA — not a recommendation.
Other clinicians in Piedmont Providers LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215220488 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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