DR. JAMES W O'BRIEN (MD) – Gastroenterology Physician, NPI 1841275252
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
401 GASTROENTEROLOGY in CT
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Provider Addresses for DR. JAMES W O'BRIEN (MD)
353, Main Street, Manchester, Hillsborough County, New Hampshire, 03102, United States
MANCHESTER, CT 060404145
Phone: (860) 649-3477
Mailing address matches the actual address.
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.
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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: 2018-06-25
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 |
|---|---|---|---|---|
| I20180625002009 | I | Gastroenterology | HI | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 82 | 74 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 47 | 47 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 34 | 34 | $0 |
| 43242 | Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 27 | 26 | $0 |
| 43251 | Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | 25 | 20 | $0 |
Insurance plans in this area (ZIP 06040)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | CT | 45385 | Removal of polyps or growths of large bowel using an endoscope | 311 | 310 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Clinical Social Worker | AK | |
| Diagnostic Radiology, Interventional Radiology | DE | |
| - | IL | |
| P S Y C H I A T R Y | HI | |
| A N E S T H E S I O L O G Y | HI | |
| Interventional Cardiology, Internal Medicine | OR | |
| - | NJ | |
| Radiation Oncology | CA | |
| Nurse Practitioner | PA | |
| Plastic And Reconstructive Surgery | OH |
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