DR. FREAGER SINCLAIR WILLIAMS (M.D.) – Obstetrics & Gynecology Physician, NPI 1528103207
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
1,934 OBSTETRICS/GYNECOLOGY in IL
Provider Addresses for DR. FREAGER SINCLAIR WILLIAMS (M.D.)
17W740 22ND ST
OAKBROOK TERRACE, IL 601814402
Phone: (630) 627-7162
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $221.
Total Amount is formed as General ($221) + Research ($0) + Ownership ($0) = $221.
Last reported payment date: 2023-11-15 • Largest payer in this snapshot: Baxter Healthcare ($93).
Total Amount
$221
General + Research + Ownership
Payments
4
Total payment records
General Amount
$221
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-11-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Baxter Healthcare | $93 |
| Hologic Sales and Service, LLC | $69 |
| CONMED Corporation | $42 |
| Medtronic, Inc. | $17 |
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: 2008-07-12
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20080712000136 | I | Obstetrics/Gynecology | IL | 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 |
|---|---|---|---|---|
| G0101 | Cervical or vaginal cancer screening; pelvic and clinical breast examination | 11 | 11 | $0 |
Insurance plans in this area (ZIP 60181)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| - | IL | |
| N E U R O L O G Y | IL | |
| Family Practice | IL | |
| Internal Medicine, Pediatric Medicine | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL | |
| - | IL |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.