Gillian Mary O'Callaghan, APRN

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

18157 Issued in CT

Practice address

27 Sycamore St Ste 100
Glastonbury, CT 06033-7208

Phone

(860) 659-0581

Fax

(860) 657-1806

NPI assigned

Aug 31, 2026

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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

{
    "created_epoch": "1788134400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788134400000",
    "number": "1083522072",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "30 JORDAN LANE",
            "city": "WETHERSFIELD",
            "state": "CT",
            "postal_code": "061091278",
            "telephone_number": "860-845-0905",
            "fax_number": "860-913-2587"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "27 SYCAMORE ST STE 100",
            "city": "GLASTONBURY",
            "state": "CT",
            "postal_code": "060337208",
            "telephone_number": "860-659-0581",
            "fax_number": "860-657-1806"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "20 Isham Rd Ste 100",
            "address_purpose": "LOCATION",
            "city": "West Hartford",
            "state": "CT",
            "postal_code": "061072204",
            "country_code": "US",
            "telephone_number": "860-659-0581",
            "fax_number": "860-657-1806",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'CALLAGHAN",
        "first_name": "GILLIAN",
        "middle_name": "MARY",
        "credential": "APRN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-08-31",
        "last_updated": "2026-08-31",
        "certification_date": "2026-08-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "CT",
            "license": "18157",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Family Nurse Practitioner in Glastonbury, CT
• Providers in Glastonbury, CT by specialty
• Family Nurse Practitioner in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 31, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.