GREGORY RYAN SUTTON M.D.
NPI 1255575270
Internal Medicine - Hematology & Oncology in Chattanooga, TN
About Gregory Ryan Sutton M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY RYAN SUTTON M.D. (NPI 1255575270) is an individual hematology & oncology provider in Chattanooga, Tennessee, licensed in Tennessee (47962) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with Hamilton Medical Center, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Gregory Ryan Sutton 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 Gregory Sutton reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chattanooga, TN 37403
- Reassigned Medicare billing, Tennessee and Georgia enrollments
- Also billed through NPI 1881212553 (Georgia)
- 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.
Areas of Expertise CMS Part B claims 67
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.
Hamilton Medical Center
Acute Care Hospitals · Dalton, GAChi Memorial Hospital- Georgia
Acute Care Hospitals · Fort Oglethorpe, GAMemorial Healthcare System, Inc
Acute Care Hospitals · Chattanooga, TNErlanger Medical Center
Acute Care Hospitals · Chattanooga, TNParkridge Medical Center
Acute Care Hospitals · Chattanooga, TNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 37404 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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 37404
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 Gregory Sutton's NPI number?
The NPI number for Gregory Sutton is 1255575270. It was assigned to this individual provider in the NPPES registry on April 21, 2009. The provider is also known as Gregg Sutton M.D..
Where is Gregory Sutton located?
Gregory Sutton practices at 2200 E 3rd St Suite 100, Chattanooga, TN 37404. The listed phone number is (423) 698-1844.
What is Gregory Sutton's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Gregory Sutton enrolled in Medicare?
Yes. Gregory Sutton 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 Gregory Sutton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Sutton reassigns Medicare benefits to Tennessee Oncology (Chattanooga, TN). 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 Gregory Sutton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Sutton accept?
Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama and Ambetter of North Carolina and 5 other insurers list Gregory Sutton 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 Gregory Sutton affiliated with any hospitals?
According to CMS data, Gregory Sutton is affiliated with Hamilton Medical Center, Chi Memorial Hospital- Georgia, Memorial Healthcare System, Inc, Erlanger Medical Center and Parkridge Medical Center.
When was this NPI record last updated?
The NPPES record for Gregory Sutton was last updated on May 22, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.