DR. ATHANASIOS TSIOURIS M.D. FACS
NPI 1336370576
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Meridian, MS
About Dr. Athanasios Tsiouris M.d. Facs NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ATHANASIOS TSIOURIS M.D. FACS (NPI 1336370576) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Meridian, Mississippi, licensed in Mississippi (30213) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS, is affiliated with University Of Mississippi Med Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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. Athanasios Tsiouris M.d. Facs 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 Reassignments
3Medicare enrollment records show Athanasios Tsiouris reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Meridian, MS 39301
- Reassigned Medicare billing, Mississippi enrollment
- 173 clinicians in this Medicare group
Canton, MS 39046
- Reassigned Medicare billing, Mississippi enrollment
- 1,932 clinicians in this Medicare group
Flowood, MS 39232
- Reassigned Medicare billing, Mississippi enrollment
- 87 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 4
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Mississippi Med Center
Acute Care Hospitals · Jackson, MSAnderson Regional Medical Center
Acute Care Hospitals · Meridian, MSMerit Health River Oaks
Acute Care Hospitals · Flowood, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39301 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Athanasios Tsiouris's NPI number?
The NPI number for Athanasios Tsiouris is 1336370576. It was assigned to this individual provider in the NPPES registry on August 5, 2009.
Where is Athanasios Tsiouris located?
Athanasios Tsiouris practices at 1400 20th Ave Ste F, Meridian, MS 39301. The listed phone number is (601) 553-2135.
What is Athanasios Tsiouris's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Athanasios Tsiouris enrolled in Medicare?
Yes. Athanasios Tsiouris 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 organizations bill Medicare for Athanasios Tsiouris's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Athanasios Tsiouris reassigns Medicare benefits to 3 organizations: Anderson Physician Alliance, Inc (Meridian, MS), State Of Mississippi - University Of Mississippi Medical Center (Canton, MS) and Mississippi Hma Hospitalists, LLC (Flowood, MS). 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 Athanasios Tsiouris's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Athanasios Tsiouris accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 5 other insurers list Athanasios Tsiouris 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 Athanasios Tsiouris affiliated with any hospitals?
According to CMS data, Athanasios Tsiouris is affiliated with University Of Mississippi Med Center, Anderson Regional Medical Center and Merit Health River Oaks.
When was this NPI record last updated?
The NPPES record for Athanasios Tsiouris was last updated on October 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Athanasios Tsiouris, M.D. FACS · NPI 1336370576
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Meridian, Mississippi. Individual provider, active in the CMS NPPES registry since August 5, 2009.
## Identity
- **NPI:** 1336370576 (Entity type: Individual)
- **Enumerated:** August 5, 2009
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 30213 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 1400 20TH AVE STE F, Meridian, MS 39301-4103
- **Phone:** (601) 553-2135
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Anderson Physician Alliance, Inc (NPI 1669770772, Meridian, MS); State Of Mississippi - University Of Mississippi Medical Center (NPI 1760285936, Canton, MS); Mississippi Hma Hospitalists, LLC (NPI 1245578558, Flowood, MS) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** October 25, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1336370576) · Data from the CMS NPPES public registry.