DR. HEATHER CAROLYN WILLIAMSON (DO) – Family Medicine Physician, NPI 1700880358
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. HEATHER CAROLYN WILLIAMSON (DO)
670, Mason Ridge Center Drive, Town and Country, Saint Louis County, Missouri, 63141, United States
STE 300
SAINT LOUIS, MO 631418573
Phone: (636) 379-4140
Fax: (636) 379-4132
Type: Mailing
3449 PHEASANT MEADOW DR
STE 107
O FALLON, MO 633687364
Phone: (636) 379-4140
Fax: (636) 379-4132
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 6 Open Payments records for all available years, with a total value of $111.
Total Amount is formed as General ($111) + Research ($0) + Ownership ($0) = $111.
Last reported payment date: 2023-10-12 • Largest payer in this snapshot: ABBVIE INC. ($35).
Total Amount
$111
General + Research + Ownership
Payments
6
Total payment records
General Amount
$111
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $35 |
| Amgen Inc. | $24 |
| AstraZeneca Pharmaceuticals LP | $21 |
| Lilly USA, LLC | $19 |
| IDORSIA PHARMACEUTICALS US INC | $13 |
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: 2004-01-08
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 |
|---|---|---|---|---|
| I20040108000806 | I | Family Practice | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 63141)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | MO | |
| - | MO | |
| - | MO | |
| - | MO | |
| Emergency Medicine | MO | |
| O B S T E T R I C S/ G Y N E C O L O G Y | IL | |
| Internal Medicine | MO | |
| Emergency Medicine | MO | |
| Allergy/Immunology, Internal Medicine | MO | |
| Physician Assistant | IL |
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