DR. ANTONIOS SIDERIS M.D.
NPI 1134495336
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Atlanta, GA
About Dr. Antonios Sideris M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANTONIOS SIDERIS M.D. (NPI 1134495336) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Atlanta, Georgia, licensed in Georgia (93957) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Piedmont Newton Hospital, and maintains a secondary practice location in San Diego.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Antonios Sideris M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Antonios Sideris reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Atlanta, GA 30309
- Reassigned Medicare billing, Georgia enrollment
- 539 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 7
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Piedmont Newton Hospital
Acute Care Hospitals · Covington, GAPiedmont Hospital
Acute Care Hospitals · Atlanta, GAPiedmont Rockdale Hospital
Acute Care Hospitals · Conyers, GAPiedmont Henry Hospital
Acute Care Hospitals · Stockbridge, GAPiedmont Fayette Hospital
Acute Care Hospitals · Fayetteville, GAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 30309 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ATLANTA, GA 30309
ATLANTA, GA 30309
ATLANTA, GA 30309
Frequently 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 Antonios Sideris's NPI number?
The NPI number for Antonios Sideris is 1134495336. It was assigned to this individual provider in the NPPES registry on April 2, 2012.
Where is Antonios Sideris located?
Antonios Sideris practices at 95 Collier Rd NW Ste 2055, Atlanta, GA 30309. The listed phone number is (404) 605-5699.
What is Antonios Sideris's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Antonios Sideris enrolled in Medicare?
Yes. Antonios Sideris is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Antonios Sideris's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Antonios Sideris reassigns Medicare benefits to Piedmont Cardiology Of Atlanta, LLC (Atlanta, GA). The 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 Antonios Sideris's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Antonios Sideris accept?
Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama and Ambetter of North Carolina and 1 other insurer list Antonios Sideris as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Antonios Sideris affiliated with any hospitals?
According to CMS data, Antonios Sideris is affiliated with Piedmont Newton Hospital, Piedmont Hospital, Piedmont Rockdale Hospital, Piedmont Henry Hospital and Piedmont Fayette Hospital.
When was this NPI record last updated?
The NPPES record for Antonios Sideris was last updated on January 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Dr. Antonios Sideris, M.D. · NPI 1134495336
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Atlanta, Georgia. Individual provider, active in the CMS NPPES registry since April 2, 2012.
## Identity
- **NPI:** 1134495336 (Entity type: Individual)
- **Enumerated:** April 2, 2012
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 93957 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 95 COLLIER RD NW STE 2055, Atlanta, GA 30309-1721
- **Phone:** (404) 605-5699
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Piedmont Cardiology Of Atlanta, LLC (NPI 1275729691, Atlanta, GA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** January 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1134495336) · Data from the CMS NPPES public registry.