NPIMap

Individual provider Active NPI

Gregory Flis, AGPCNP-BC

  • Adult Health Nurse Practitioner
  • New Haven, CT
National Provider Identifier
1922484161
Registry record updated Feb 18, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Adult Health Nurse PractitionerTaxonomy code 363LA2200X
License
6221 Issued in CT
Practice address
1 Long Wharf Dr
Spine Center
New Haven, CT 06511-5991
Phone
(203) 688-8800
NPI assigned
Aug 10, 2015
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 18, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Adult Health Nurse Practitioner 363LA2200X 6221 CT Primary
Gerontology Nurse Practitioner 363LG0600X 6221 CT

Addresses

Primary practice location

1 Long Wharf Dr
Spine Center
New Haven, CT 06511-5991

Mailing address

1 Long Wharf Dr
Spine Center
New Haven, CT 06511-5991

Other practice location 1

5 Munson Rd
Farmington, CT 06032-2094
Phone (860) 679-6551

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
I20151125001520 CT Practitioner - Nurse Practitioner 6406156314 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2015
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
University of Connecticut Health CenterGroup PAC ID 3678472016, 624 clinicians

Practice addresses (Care Compare)

100 Retreat Ave
Suite 705
Hartford, CT 06106-2553
Phone (860) 278-0070

263 Farmington Ave
Farmington, CT 06030-0001
Phone (860) 679-3692

Hospital & facility affiliations

  • Hartford Hospital Hospital, Hartford, CT, CCN 070025
  • William W Backus Hospital Hospital, Norwich, CT, CCN 070024
  • The Hospital of Central Connecticut Hospital, New Britain, CT, CCN 070035
  • Charlotte Hungerford Hospital Hospital, Torrington, CT, CCN 070011
  • Middlesex Hospital Hospital, Middletown, CT, CCN 070020

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
88.05 of 100Reported as group
Quality
70.34
Promoting interoperability
100
Improvement activities
40
Cost
75.39

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
6221CTMDAdult Health Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Yale University CurrentSince Oct 14, 2015 Accepting new patients
The Charlotte Hungerford Hospital CurrentSince Nov 1, 2023 Accepting new patients
Yale University CurrentSince Oct 14, 2015 Accepting new patients
Hartford Healthcare Medical Group Specialists, PLLC CurrentSince Feb 1, 2021 Accepting new patients
Hartford Healthcare Medical Group Specialists LLC CurrentSince Feb 1, 2021 Accepting new patients
The Charlotte Hungerford Hospital Adult Health CurrentSince Nov 1, 2023 Accepting new patients
University of Connecticut Health Center Adult Health CurrentSince Feb 11, 2026 Accepting new patients
University of Connecticut Health Center CurrentSince Feb 11, 2026 Accepting new patients
University of Connecticut Health Center Past Accepting new patients

Locations

5 Munson Rd
Farmington, CT 06032
Phone (860) 679-4888

263 Farmington Ave
Farmington, CT 06030
Phone (860) 679-4477

399 Farmington Ave
Ste 200
Farmington, CT 06032
Phone (860) 524-4388

85 Seymour St
Ste 1022
Hartford, CT 06106
Phone (860) 524-1175

85 Seymour St
Ste 1003
Hartford, CT 06106
Phone (860) 246-4260

100 Retreat Ave
Ste 705
Hartford, CT 06106
Phone (860) 278-0070

1 Long Wharf Dr
New Haven, CT 06511
Phone (203) 777-7500

800 Howard Ave
New Haven, CT 06519
Phone (203) 785-2140

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

540 Litchfield St
Torrington, CT 06790
Phone (860) 496-6361

300 Post Rd W
Ste 101
Westport, CT 06880
Phone (203) 226-2490

Interoperability endpoints

  • Direct secure messaging: gregory.flis@xdr.hhchealthdirect.org

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 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": "1439164800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771372800000",
    "number": "1922484161",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 LONG WHARF DR",
            "address_2": "SPINE CENTER",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065115991"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 LONG WHARF DR",
            "address_2": "SPINE CENTER",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065115991",
            "telephone_number": "203-688-8800"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5 Munson Rd",
            "address_purpose": "LOCATION",
            "city": "Farmington",
            "state": "CT",
            "postal_code": "060322094",
            "country_code": "US",
            "telephone_number": "860-679-6551",
            "fax_number": "860-679-0131",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "FLIS",
        "first_name": "GREGORY",
        "credential": "AGPCNP-BC",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-08-10",
        "last_updated": "2026-02-18",
        "certification_date": "2026-02-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Adult Health",
            "state": "CT",
            "license": "6221",
            "primary": true
        },
        {
            "code": "363LG0600X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Gerontology",
            "state": "CT",
            "license": "6221",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New Haven, CT

Sources for this page

Verify at the official NPI Registry.