1. Home
  2. Directory
  3. Georgia
  4. Augusta
  5. Internal Medicine
  6. NPI Profile

DR. DON E WILLIAMSON MD
NPI 1912984790
Internal Medicine - Nephrology in Augusta, GA

Active since December 22, 2005PECOS Enrolled
820 ST. SEBASTIAN WAY, SUITE 8A, AUGUSTA, GA 30901(706) 722-6900(706) 722-5118 Get Directions Write a Review

NPPES record last updated: December 30, 2009. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Don E Williamson Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DON E WILLIAMSON MD (NPI 1912984790) is an individual nephrology provider in Augusta, Georgia, licensed in Georgia (034079) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912984790
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. DON E WILLIAMSONCredential: MD
Location Address820 ST. SEBASTIAN WAY, SUITE 8AAugusta, GA 30901
Mailing Address820 St. Sebastian Way, Suite 8aAugusta, GA 30901 · (706) 722-6900 · Fax (706) 722-5118
Phone(706) 722-6900
Fax(706) 722-5118
Sole ProprietorNo
Enumeration DateDecember 22, 2005
Last NPPES UpdateDecember 30, 2009
✔ NPI 1912984790 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses✔ Licensed in GA · 034079✔ Licensed in SC · 30727
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
820 ST. SEBASTIAN WAY, Augusta, GA 30901
Open in Google Maps ↗

Other Identifiers 24

Other390002661GA · Railroad Medicare
Medicaid000535719ARGA
Medicaid000535719RGA
Medicaid000535719AOGA
Medicaid000535719ASGA
Medicaid000535719HGA
Medicaid000535719NGA
Medicaid000535719PGA
Medicaid000535719AKGA
Medicare UPINF52441GA
Medicaid000535719AQGA
Medicaid000535719AAGA
Medicare PIN39BDBRDGA
Other338219GA · Wellcare
Medicaid000535719APGA
Medicaid000535719ALGA
MedicaidG34079SC
Other1912984790GA · Blue Cross Blue Shield
Other10058001GA · Amerigroup
Medicaid000535719ATGA
Medicaid000535719QGA
Medicaid000535719MGA
Medicare PINF524417437SC
Medicare PINAA35717437SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Molina Healthcare, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Don E Williamson Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Don Williamson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Wellstar Medical Group, LLC
141 mi
Family Medicine
11685 ALPHARETTA HWY, SUITE 300
Roswell, GA 30076
  • Reassigned Medicare billing, Georgia enrollment
  • 3,885 clinicians in this Medicare group
NPI 1922405729 (678) 325-6611

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$124.10 typical visit price
range $53.31 – $164.04
Typical copayment $31.02 (range $13.32 – $41.01)
Most-billed visit code 99204
Established Patient
$94.84 typical visit price
range $16.68 – $133.24
Typical copayment $23.71 (range $4.17 – $33.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JACK H. AUSTIN, JR., MD, PC
Internal Medicine (Infectious Disease)
820 ST. SEBASTIAN WAY, SUITE 4A
AUGUSTA, GA 30901
Richmond County (706) 724-4376
MR. MATTHEW A. PETERS PA-C
Physician Assistant (Medical)
820 ST. SEBASTIAN WAY, SUITE 8A
AUGUSTA, GA 30901
Richmond County (706) 722-6900
BIMAL R SHAH MD
Internal Medicine
820 ST. SEBASTIAN WAY, SUITE 2A
AUGUSTA, GA 30901
Richmond County (706) 722-1249
DR. SHUKHRAT ARTIKOV M.D.
Internal Medicine (Nephrology)
820 ST. SEBASTIAN WAY, SUITE 8A
AUGUSTA, GA 30901
Richmond County (706) 722-6900
DR. CLAY H WILSON MD
Internal Medicine (Nephrology)
820 ST. SEBASTIAN WAY, SUITE 8A
AUGUSTA, GA 30901
Richmond County (706) 722-6900
BRIAN K. PHELAN M.D.
Internal Medicine
820 ST. SEBASTIAN WAY, SUITE 2A
AUGUSTA, GA 30901
Richmond County (706) 722-1249
MARY W CHEN M.D.
Internal Medicine
820 ST. SEBASTIAN WAY, SUITE 4C
AUGUSTA, GA 30901
Richmond County (706) 774-5996
UNIVERSITY ENDOCRINE & INTERNAL MEDICINE INC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
820 ST. SEBASTIAN WAY, SUITE 7A
AUGUSTA, GA 30901
Richmond County (706) 722-0463

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 Don Williamson's NPI number?

The NPI number for Don Williamson is 1912984790. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Where is Don Williamson located?

Don Williamson practices at 820 St. Sebastian Way Suite 8A, Augusta, GA 30901. The listed phone number is (706) 722-6900.

What is Don Williamson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Don Williamson enrolled in Medicare?

Yes. Don Williamson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Don Williamson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Don Williamson reassigns Medicare benefits to Wellstar Medical Group, LLC (Roswell, 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 Don Williamson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Don Williamson accept?

Health plans from Alliant Health Plans, Inc., Molina Healthcare and Oscar Health list Don 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.

When was this NPI record last updated?

The NPPES record for Don Williamson was last updated on December 30, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.