DR. MARK CARL WILLIAMS (M.D.) – Maternal & Fetal Medicine Physician, NPI 1932183951
Maternal & Fetal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,538 OBSTETRICS/GYNECOLOGY in FL
Provider Addresses for DR. MARK CARL WILLIAMS (M.D.)
9981 HEALTHPARK CIRCLE
SUITE 159
FORT MYERS, FL 33908
Phone: (239) 481-5477
Fax: (239) 481-5892
Type: Location
9981 HEALTH PARK CIRCLE
SUITE 159
FORT MYERS, FL 33908
Phone: (239) 481-5477
Fax: (239) 481-5892
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $28.
Total Amount is formed as General ($28) + Research ($0) + Ownership ($0) = $28.
Last reported payment date: 2023-07-10 • Largest payer in this snapshot: Dexcom, Inc. ($15).
Total Amount
$28
General + Research + Ownership
Payments
2
Total payment records
General Amount
$28
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-07-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Dexcom, Inc. | $15 |
| Daiichi Sankyo 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: 2004-03-01
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 |
|---|---|---|---|---|
| I20040301001115 | I | Obstetrics/Gynecology | FL | 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 33908)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | FL | |
| - | FL | |
| - | FL | |
| O B S T E T R I C S/ G Y N E C O L O G Y | FL | |
| - | FL | |
| O B S T E T R I C S/ G Y N E C O L O G Y | FL | |
| - | FL | |
| O B S T E T R I C S/ G Y N E C O L O G Y | FL | |
| - | SC | |
| O B S T E T R I C S/ G Y N E C O L O G Y | FL |
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