James O'Brien, MD
NPI 1841275252 · Gastroenterology Physician · Manchester, CT
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James O'Brien, MD is a Gastroenterology Physician provider in Manchester, CT (NPI 1841275252).
Provider details
- NPI number
- 1841275252
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD-19477 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
279 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 89 | $50 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 36 | $211 |
| Ultrasound Guided Needle Aspiration Or Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43242 | 27 | $219 |
| Removal of Polyps Or Growths of Esophagus, Stomach, And/Or Upper Small Bowel Using an Endoscope With Mechanical Snare43251 | 26 | $97 |
| Removal of Stone Or Debris From Bile Or Pancreatic Duct Using a Flexible Endoscope43264 | 25 | $104 |
| Insertion of Stent Into Pancreatic Or Bile Duct Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 92 | 42 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 52 | 51 |
| Omeprazole | 24 | — |
| Famotidine | 22 | 11 |
| Ciprofloxacin Hcl | 21 | 20 |
| Lipase/Protease/Amylasebrand: Creon | 15 | — |
| Sucralfate | 15 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-08
- Last updated
- 2025-05-01
- Certified
- 2025-05-01
Frequently asked questions
- What is James O'Brien's NPI number?
- James O'Brien's National Provider Identifier (NPI) is 1841275252, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James O'Brien's specialty?
- James O'Brien is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is James O'Brien located?
- James O'Brien's practice location on file with NPPES is 353 Main St, Manchester, CT 06040-4145.
- What is James O'Brien's phone number?
- The practice phone number listed in the NPPES registry for James O'Brien is (860) 649-3477.
- Does James O'Brien accept Medicare?
- James O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James O'Brien's NPI active?
- Yes — James O'Brien's NPI (1841275252) is active in the NPPES registry as of the last update on 2025-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.