DR. MICHAEL ROBERT O'BRIEN (M.D.) – Internal Medicine Physician, NPI 1215257100
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
9,962 INTERNAL MEDICINE in PA
Provider Addresses for DR. MICHAEL ROBERT O'BRIEN (M.D.)
28 SADDLEBROOK LN
PHOENIXVILLE, PA 194602393
Phone: (631) 255-2601
Type: Mailing
170 N HENDERSON RD STE 310
KING OF PRUSSIA, PA 194062155
Phone: (610) 801-1805
Type: Location
4 JACKSON ST
BEACON, NY 125083453
Phone: (845) 883-8633
Type: Mailing
4808 Edgmont Ave
Brookhaven, PA 190151400
Phone: (610) 876-3072
Type: Location
4 Jackson St
Beacon, NY 125083453
Phone: (845) 883-8633
Type: Location
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: 2024-02-06
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 |
|---|---|---|---|---|
| I20240206000491 | I | Internal Medicine | PA | 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 19460)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA | |
| Osteopathic Manipulative Medicine, Hospice/Palliative Care, Family Practice | CA | |
| Nurse Practitioner | CA | |
| Physician Assistant | CA | |
| Plastic And Reconstructive Surgery | CA | |
| Nurse Practitioner | CA | |
| General Practice | AR | |
| Physician Assistant | CA | |
| Physician Assistant | CA |
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