ANN T WARREN (MD) – Specialist, NPI 1902993603
Specialist
Main info
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for ANN T WARREN (MD)
Farm View Circle, Twin Pond Farms, Lake Barrington, Cuba, Lake County, Illinois, 60010, United States
LAKE BARRINGTON, IL 600107022
Phone: (847) 381-5104
Fax: (847) 381-0604
Type: Mailing
27790 W IL ROUTE 22 STE 32
BARRINGTON, IL 600102396
Phone: (847) 381-8181
Fax: (847) 381-0604
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $124.
Total Amount is formed as General ($124) + Research ($0) + Ownership ($0) = $124.
Last reported payment date: 2023-07-12 • Largest payer in this snapshot: Amgen Inc. ($124).
Total Amount
$124
General + Research + Ownership
Payments
1
Total payment records
General Amount
$124
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-07-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Amgen Inc. | $124 |
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: 2012-05-02
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 |
|---|---|---|---|---|
| I20120502000652 | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 60010)
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Reviews
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