DR. THOMAS CLAYTON WILLIAMSON JR. M.D.
NPI 1023429941
Internal Medicine - Hematology & Oncology in Winston Salem, NC
About Dr. Thomas Clayton Williamson Jr. M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THOMAS CLAYTON WILLIAMSON JR. M.D. (NPI 1023429941) is an individual hematology & oncology provider in Winston Salem, North Carolina, licensed in Mississippi (24656) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS, is affiliated with St Dominic-jackson Memorial Hospital, and is a graduate of University Of North Carolina At Chapel Hill School Of Medicine (2014).
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. Thomas Clayton Williamson Jr. 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 Thomas Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Jackson, MS 39202
- Reassigned Medicare billing, Mississippi enrollment
- 17 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 59
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.
St Dominic-Jackson Memorial Hospital
Acute Care Hospitals · Jackson, MSKing's Daughters Medical Center-Brookhaven
Acute Care Hospitals · Brookhaven, MSMississippi Baptist Medical Center
Acute Care Hospitals · Jackson, MSS E Lackey Memorial Hospital
Critical Access Hospitals · Forest, MSBaptist Medical Center Attala
Critical Access Hospitals · Kosciusko, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27157 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 2
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WINSTON-SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
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 Thomas Williamson's NPI number?
The NPI number for Thomas Williamson is 1023429941. It was assigned to this individual provider in the NPPES registry on May 13, 2014.
Where is Thomas Williamson located?
Thomas Williamson practices at 1 Medical Center Blvd, Winston Salem, NC 27157. The listed phone number is (336) 716-6777.
What is Thomas Williamson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Thomas Williamson enrolled in Medicare?
Yes. Thomas Williamson 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 Thomas Williamson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Williamson reassigns Medicare benefits to Jackson Oncology Associates (Jackson, MS). 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 Thomas Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Williamson 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 Thomas Williamson 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 Thomas Williamson affiliated with any hospitals?
According to CMS data, Thomas Williamson is affiliated with St Dominic-Jackson Memorial Hospital, King's Daughters Medical Center-Brookhaven, Mississippi Baptist Medical Center, S E Lackey Memorial Hospital and Baptist Medical Center Attala.
When was this NPI record last updated?
The NPPES record for Thomas Williamson was last updated on September 14, 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.