NPIMap

Individual provider Active NPI

James W O'Brien, MD

  • Gastroenterology Physician
  • Manchester, CT
National Provider Identifier
1841275252
Registry record updated May 1, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
035189 Issued in CT
Practice address
353 Main St
Manchester, CT 06040-4145
Phone
(860) 649-3477
NPI assigned
Dec 8, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 1, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X MD-19477 HI
Gastroenterology Physician 207RG0100X 035189 CT Primary

Addresses

Primary practice location

353 Main St
Manchester, CT 06040-4145

Mailing address

353 Main St
Manchester, CT 06040-4145
Phone (860) 649-3477

Other identifiers 1

IdentifierTypeStateIssuer
001351890MedicaidCT

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in HI
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20180625002009 HI Practitioner - GastroenterologyPractitioner - Internal Medicine 7719087790 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
GastroenterologyAlso: Internal Medicine
Education
Duke University School of Medicine, 1991
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Hilo Benioff Medical CenterGroup PAC ID 1254422900, 131 clinicians
Straub Clinic and HospitalGroup PAC ID 6305759754, 420 clinicians

Practice addresses (Care Compare)

1190 Waianuenue Ave
Hilo, HI 96720-2089
Phone (808) 932-3000

888 S King St
Honolulu, HI 96813-3097
Phone (808) 522-4000

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
83.72 of 100Reported as group
Quality
67.55
Promoting interoperability
100
Improvement activities
40
Cost
78.18

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy116
Upper gastrointestinal (GI) endoscopy for acid reflux534

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
035189CTMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Hilo Benioff Medical Center CurrentSince Jun 6, 2022 Accepting new patients
Kau Hospital CurrentSince Jun 6, 2022 Accepting new patients
Hilo Benioff Medical Center CurrentSince Jun 6, 2022 Accepting new patients
Kau Hospital CurrentSince Jun 6, 2022 Accepting new patients
Straub Clinic & Hospital CurrentSince Jun 18, 2018 Accepting new patients
Straub Clinic & Hospital CurrentSince Jun 18, 2018 Accepting new patients
Klipstein Medical Group PC Gastroenterology Past Accepting new patients
Straub Clinic & Hospital Past Accepting new patients
Hilo Benioff Medical Center Past Accepting new patients

Locations

1190 Waianuenue Ave
Hilo, HI 96720
Phone (808) 932-3000

888 S King St
Honolulu, HI 96813
Phone (808) 522-4000

Organizations & group practices 9

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 4

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1134000000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1746057600000",
    "number": "1841275252",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "353 MAIN ST",
            "city": "MANCHESTER",
            "state": "CT",
            "postal_code": "060404145",
            "telephone_number": "860-649-3477"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "353 MAIN ST",
            "city": "MANCHESTER",
            "state": "CT",
            "postal_code": "060404145",
            "telephone_number": "860-649-3477"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "JAMES",
        "middle_name": "W",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-08",
        "last_updated": "2025-05-01",
        "certification_date": "2025-05-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "HI",
            "license": "MD-19477",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CT",
            "license": "035189",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "001351890",
            "state": "CT"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Manchester, CT

Sources for this page

Verify at the official NPI Registry.