DR. W. HAMILTON III WILLIAMS (M.D.) – Radiation Oncology Physician, NPI 1407846561
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
203 RADIATION ONCOLOGY in GA
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Provider Addresses for DR. W. HAMILTON III WILLIAMS (M.D.)
Flowers of Marietta, 1100, Johnson Ferry Road Northeast, Heritage Glen, Marietta, Cobb County, Georgia, 30068, United States
SUITE 150
MARIETTA, GA 300625635
Phone: (770) 693-6022
Fax: (770) 693-6039
Type: Mailing
McDonald's, 1000, Johnson Ferry Road Northeast, Ridgeview Forest, Atlanta, Fulton County, Georgia, 30346, United States
ATLANTA, GA 303421606
Phone: (404) 851-8850
Fax: (404) 851-6010
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $423.
Total Amount is formed as General ($423) + Research ($0) + Ownership ($0) = $423.
Last reported payment date: 2024-06-28 • Largest payer in this snapshot: GE HealthCare ($151).
Total Amount
$423
General + Research + Ownership
Payments
4
Total payment records
General Amount
$423
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GE HealthCare | $151 |
| Sumitomo Pharma America, Inc. | $125 |
| Bayer Healthcare Pharmaceuticals Inc. | $122 |
| AstraZeneca Pharmaceuticals LP | $25 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-07-29
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050729000858 | I | Radiation Oncology | GA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 2,300 | 83 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 495 | 97 | $0 |
| 77300 | Calculation of radiation therapy dose | 423 | 115 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 208 | 109 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 168 | 15 | $0 |
Insurance plans in this area (ZIP 30062)
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