ADAM MESSENGER (M.D.) – Hospitalist Physician, NPI 1447471784
Hospitalist Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for ADAM MESSENGER (M.D.)
31, River Road, Mianus, Greenwich, Fairfield County, Connecticut, 06807, United States
200
COS COB, CT 068072152
Phone: (203) 661-9433
Type: Location
121, Pilgrim Drive, Pemberwick, Glenville, Greenwich, Western Connecticut Planning Region, Connecticut, 06831, United States
GREENWICH, CT 068314941
Phone: (914) 433-0633
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 10 Open Payments records for all available years, with a total value of $631.
Total Amount is formed as General ($631) + Research ($0) + Ownership ($0) = $631.
Last reported payment date: 2024-03-22 • Largest payer in this snapshot: Merz North America, Inc. ($593).
Total Amount
$631
General + Research + Ownership
Payments
10
Total payment records
General Amount
$631
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-03-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merz North America, Inc. | $593 |
| ABBVIE INC. | $24 |
| Galderma Laboratories, L.P. | $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: 2007-12-10
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 |
|---|---|---|---|---|
| I20071210000037 | I | Internal Medicine | CT | 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 06807)
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