FRED HARRISON WILLIAMS (MD) – Gastroenterology Physician, NPI 1386644326
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
489 GASTROENTEROLOGY in MO
Provider Addresses for FRED HARRISON WILLIAMS (MD)
121 SAINT LUKES CENTER DR
SUITE 406
CHESTERFIELD, MO 630173509
Phone: (314) 432-5900
Fax: (314) 434-2679
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 6 Open Payments records for all available years, with a total value of $219.
Total Amount is formed as General ($219) + Research ($0) + Ownership ($0) = $219.
Last reported payment date: 2024-08-22 • Largest payer in this snapshot: Lilly USA, LLC ($121).
Total Amount
$219
General + Research + Ownership
Payments
6
Total payment records
General Amount
$219
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $121 |
| ABBVIE INC. | $54 |
| Daiichi Sankyo Inc. | $25 |
| IRONWOOD PHARMACEUTICALS, INC | $19 |
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: 2010-06-09
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 |
|---|---|---|---|---|
| I20100609000414 | I | Gastroenterology | MO | 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 |
|---|---|---|---|---|
| 99439 | Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | 111 | 15 | $0 |
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 101 | 63 | $0 |
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 64 | 15 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 59 | 59 | $0 |
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | 58 | 58 | $0 |
Insurance plans in this area (ZIP 63017)
Loading plans...
Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MO | |
| Internal Medicine | MO | |
| Certified Registered Nurse Anesthetist (Crna) | MO | |
| Nurse Practitioner | MO | |
| Gastroenterology, Internal Medicine | MO | |
| - | MO | |
| Nurse Practitioner | MO | |
| Nurse Practitioner | MO | |
| Gastroenterology, Internal Medicine | MO | |
| Internal Medicine | MO |
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.