NPIMap

Individual provider Active NPI

Jonathan Blair Williamson, M.D.

  • Gastroenterology Physician
  • Hartford, CT
National Provider Identifier
1881891703
Registry record updated Jan 4, 2019
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
052966 Issued in CT
Practice address
85 Seymour St
Suite 1000
Hartford, CT 06106-5501
Phone
(860) 246-2571
Fax
(860) 246-3691
NPI assigned
Jul 3, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 4, 2019

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X 052966 CT Primary

Addresses

Primary practice location

85 Seymour St
Suite 1000
Hartford, CT 06106-5501

Mailing address

30 Waterchase Dr
Rocky Hill, CT 06067-2110
Phone (860) 257-4131

Other identifiers 1

IdentifierTypeStateIssuer
008052313MedicaidCT

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CT
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
I20140805001102 CT Practitioner - Gastroenterology 1850532870 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Other, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Hartford Healthcare Medical Group Specialists PLLCGroup PAC ID 3173866241, 1,555 clinicians
Connecticut Gi PLLCGroup PAC ID 9830110758, 243 clinicians

Practice addresses (Care Compare)

10 Jolley Dr
Bloomfield, CT 06002-3061
Phone (860) 286-2470

1244 Storrs Rd
Road
Storrs, CT 06268-2200
Phone (860) 724-2579

85 Seymour St
Suite 1000
Hartford, CT 06106-5529
Phone (860) 246-2571

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
90.42 of 100Reported as group
Quality
83.36
Promoting interoperability
100
Improvement activities
40
Cost
75.9

Merit-based Incentive Payment System (MIPS)

Final score
91.99 of 100Reported as group
Quality
89.16
Promoting interoperability
100
Improvement activities
40
Cost
78.45

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy94
Upper gastrointestinal (GI) endoscopy for acid reflux106

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
Flagged The directory lists this NPI on an HHS exclusion list. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
052966CTMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Hartford Healthcare Medical Group Specialists, PLLC CurrentSince Jan 1, 2021 Accepting new patients
Connecticut Gi PLLC Gastroenterology CurrentSince Aug 1, 2014 Accepting new patients
Hartford Healthcare Medical Group Specialists LLC CurrentSince Jan 1, 2021 Accepting new patients
Hartford Hospital Past Accepting new patients
Litchfield County Gastroenterology Associates, LLC Gastroenterology Past Accepting new patients
Connecticut Gi Endoscopy Center LLC Past Accepting new patients

Locations

300 Western Blvd
Ste B
Glastonbury, CT 06033
Phone (860) 657-1920

300 Western Blvd
Ste A
Glastonbury, CT 06033
Phone 8606571920 ext. 86065

85 Seymour St
Ste 1000
Hartford, CT 06106
Phone (860) 246-2571

30 Waterchase Dr
Rocky Hill, CT 06067
Phone (860) 257-4131

2400 Tamarack Ave
Ste 101
South Windsor, CT 06074
Phone (860) 533-4693

1244 Storrs Rd
Storrs Mansfield, CT 06268
Phone (860) 724-2579

Interoperability endpoints

  • Direct secure messaging: jonathan.blair.williamson@xdr.hhchealthdirect.org

Organizations & group practices 6

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 9

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": "1183420800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1546560000000",
    "number": "1881891703",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "30 WATERCHASE DR",
            "city": "ROCKY HILL",
            "state": "CT",
            "postal_code": "060672110",
            "telephone_number": "860-257-4131",
            "fax_number": "860-257-4519"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "85 SEYMOUR ST",
            "address_2": "SUITE 1000",
            "city": "HARTFORD",
            "state": "CT",
            "postal_code": "061065501",
            "telephone_number": "860-246-2571",
            "fax_number": "860-246-3691"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "JONATHAN",
        "middle_name": "BLAIR",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-07-03",
        "last_updated": "2019-01-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CT",
            "license": "052966",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "008052313",
            "state": "CT"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Hartford, CT

Sources for this page

Verify at the official NPI Registry.