MICHAEL HARRIS NATHANSON (MD) – Gastroenterology Physician, NPI 1437132230
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
12,378 INTERNAL MEDICINE in FL
Provider Addresses for MICHAEL HARRIS NATHANSON (MD)
4805 NW 2nd Ave
Boca Raton, FL 334314141
Phone: (561) 961-0208
Type: Location
Lippard Laboratory, 15, York Street, Downtown, New Haven, New Haven County, Connecticut, 06511, United States
LMP - 180
NEW HAVEN, CT 065103221
Phone: (203) 785-4138
Fax: (203) 737-1345
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2010-05-03
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 |
|---|---|---|---|---|
| I20100503000382 | 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 33431)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| H E M A T O L O G Y/ O N C O L O G Y | CT | |
| - | CT | |
| - | NC | |
| Internal Medicine | CT | |
| - | CT | |
| - | CT | |
| - | CT | |
| Physician Assistant | CT | |
| - | CT | |
| - | CT |
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