DR. SEAN MEDARD PARKER MD
NPI 1003442955
Radiology - Radiation Oncology in Chattanooga, TN
About Dr. Sean Medard Parker Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SEAN MEDARD PARKER MD (NPI 1003442955) is an individual radiation oncology provider in Chattanooga, Tennessee, licensed in Tennessee (73552) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Chi Memorial Hospital- Georgia, and is a graduate of West Virginia University School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses
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. Sean Medard Parker Md 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
2Medicare enrollment records show Sean Parker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chattanooga, TN 37411
- Reassigned Medicare billing, Georgia and Tennessee enrollments
- 242 clinicians in this Medicare group
Chattanooga, TN 37403
- Reassigned Medicare billing, Tennessee enrollment
- 464 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.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Chi Memorial Hospital- Georgia
Acute Care Hospitals · Fort Oglethorpe, GAMemorial Healthcare System, Inc
Acute Care Hospitals · Chattanooga, TNErlanger Medical Center
Acute Care Hospitals · Chattanooga, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37421 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHATTANOOGA, TN 37421
CHATTANOOGA, TN 37421
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 Sean Parker's NPI number?
The NPI number for Sean Parker is 1003442955. It was assigned to this individual provider in the NPPES registry on March 22, 2020.
Where is Sean Parker located?
Sean Parker practices at 1635 Gunbarrel Rd Ste 100, Chattanooga, TN 37421. The listed phone number is (423) 778-8525.
What is Sean Parker's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Sean Parker enrolled in Medicare?
Yes. Sean Parker 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 Sean Parker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sean Parker reassigns Medicare benefits to 2 organizations: Memorial Health Partners Foundation, Inc (Chattanooga, TN) and Tennessee Oncology (Chattanooga, TN). 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 Sean Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sean Parker accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 4 other insurers list Sean Parker 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 Sean Parker affiliated with any hospitals?
According to CMS data, Sean Parker is affiliated with Chi Memorial Hospital- Georgia, Memorial Healthcare System, Inc and Erlanger Medical Center.
When was this NPI record last updated?
The NPPES record for Sean Parker was last updated on August 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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. Sean Medard Parker, MD · NPI 1003442955
Radiation Oncology physician in Chattanooga, Tennessee. Individual provider, active in the CMS NPPES registry since March 22, 2020.
## Identity
- **NPI:** 1003442955 (Entity type: Individual)
- **Enumerated:** March 22, 2020
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** 73552 (Tennessee)
- **Sole proprietor:** No
## Practice location
- **Address:** 1635 GUNBARREL RD STE 100, Chattanooga, TN 37421-4983
- **Phone:** (423) 778-8525
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Memorial Health Partners Foundation, Inc (NPI 1922053545, Chattanooga, TN); Tennessee Oncology (NPI 1912623364, Chattanooga, TN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** West Virginia University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** August 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1003442955) · Data from the CMS NPPES public registry.