JOHN W SIEBER II PA/AA
NPI 1386681492
Anesthesiologist Assistant in Savannah, GA
About John W Sieber Ii Pa/aa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN W SIEBER II PA/AA (NPI 1386681492) is an individual anesthesiologist assistant in Savannah, Georgia, licensed in Georgia (003189) and active in the NPI registry since May 2006. He is affiliated with Wellstar Cobb Medical Center and is a graduate of Other (1998).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John W Sieber Ii Pa/aa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show John Sieber reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stone Mountain, GA 30087
- Reassigned Medicare billing, Georgia enrollment
- 650 clinicians in this Medicare group
Kennesaw, GA 30152
- Reassigned Medicare billing, Georgia enrollment
- 629 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Wellstar Cobb Medical Center
Acute Care Hospitals · Austell, GAFrequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Sieber's NPI number?
The NPI number for John Sieber is 1386681492. It was assigned to this individual provider in the NPPES registry on May 31, 2006.
Where is John Sieber located?
John Sieber practices at 18 Half Penny Cir, Savannah, GA 31411. The listed phone number is (912) 346-2316.
What is John Sieber's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is John Sieber enrolled in Medicare?
Yes. John Sieber is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Sieber's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Sieber reassigns Medicare benefits to 2 organizations: American Anesthesiology Associates Of Georgia, LLC (Stone Mountain, GA) and Mak Anesthesia Holdings LLC (Kennesaw, GA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Sieber's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Sieber affiliated with any hospitals?
According to CMS data, John Sieber is affiliated with Wellstar Cobb Medical Center.
When was this NPI record last updated?
The NPPES record for John Sieber was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John W Sieber II, PA/AA · NPI 1386681492
Anesthesiologist Assistant physician in Savannah, Georgia. Individual provider, active in the CMS NPPES registry since May 31, 2006.
## Identity
- **NPI:** 1386681492 (Entity type: Individual)
- **Enumerated:** May 31, 2006
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **State license:** 003189 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 18 HALF PENNY CIR, Savannah, GA 31411-2706
- **Phone:** (912) 346-2316
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): American Anesthesiology Associates Of Georgia, LLC (NPI 1528068673, Stone Mountain, GA); Mak Anesthesia Holdings LLC (NPI 1912452939, Kennesaw, GA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** September 29, 2026
- **Other identifiers:** Other P00392013 (GA); Medicaid 100000211E (GA)
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Source: [NPI Profile](https://npiprofile.com/npi/1386681492) · Data from the CMS NPPES public registry.