NPIMap

Organization Active NPI

Apt Foundation Inc

Doing business as Guilford Clinic

  • Methadone Clinic
  • Guilford, CT
National Provider Identifier
1013734888
Registry record updated Mar 5, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Methadone ClinicTaxonomy code 261QM2800X
Legal business name
APT FOUNDATION INC
Doing business as
Guilford Clinic
Practice address
439 Boston Post Rd
Guilford, CT 06437-2931
Phone
(203) 781-4600
Fax
(203) 781-4624
NPI assigned
Sep 24, 2024
Last updated
Mar 5, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Mar 5, 2026

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

Authorized official

Name
Mrs. Lynn M Madden, PHD, MPA
Title
President/Chief Executive Officer
Phone
(203) 781-4600

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Clinic/Center 261Q00000X NU
Adult Mental Health Clinic/Center 261QM0850X NU
Methadone Clinic 261QM2800X NU Primary
Substance Use Disorder Rehabilitation Clinic/Center 261QR0405X NU

Addresses

Primary practice location

439 Boston Post Rd
Guilford, CT 06437-2931

Mailing address

1 Long Wharf Dr Ste 321B
New Haven, CT 06511-5991
Phone (203) 781-4600

Other identifiers 2

IdentifierTypeStateIssuer
008130776MedicaidCT
008130777MedicaidCT

Other names 1

  • Guilford Clinic Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CT
Opioid treatment program
Medicare-enrolled since Jan 1, 2020

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20200117001383 CT Part B Supplier - Opioid Treatment Program (Otp) 8729250204 5 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: New Haven, CT; West Haven, CT; North Haven, CT; Guilford, CT

Other NPIs on the same Medicare enrollment 5

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

National Provider Directory

National Provider Directory
Tax ID family
Addiction Prev Treatmen25 organizations share this tax ID, including this one

Other organizations with this tax ID 24

Organizations that report the same tax identification number in the National Provider Directory.

View all 24

Locations

439 Boston Post Rd
Guilford, CT 06437
Phone (203) 781-4600

Practitioners & affiliated clinicians

Practitioners 3

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

NPI Registry JSON

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

{
    "created_epoch": "1727136000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1772668800000",
    "number": "1013734888",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 LONG WHARF DR STE 321B",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065115991",
            "telephone_number": "203-781-4600",
            "fax_number": "203-781-4624"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "439 BOSTON POST RD",
            "city": "GUILFORD",
            "state": "CT",
            "postal_code": "064372931",
            "telephone_number": "203-781-4600",
            "fax_number": "203-781-4624"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "APT FOUNDATION INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2024-09-24",
        "last_updated": "2026-03-05",
        "certification_date": "2026-03-05",
        "status": "A",
        "authorized_official_last_name": "MADDEN",
        "authorized_official_first_name": "LYNN",
        "authorized_official_middle_name": "M",
        "authorized_official_title_or_position": "PRESIDENT/CHIEF EXECUTIVE OFFICER",
        "authorized_official_telephone_number": "203-781-4600",
        "authorized_official_name_prefix": "Mrs.",
        "authorized_official_credential": "PHD, MPA"
    },
    "taxonomies": [
        {
            "code": "261Q00000X",
            "taxonomy_group": "",
            "desc": "Clinic/Center",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "261QM0850X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Adult Mental Health",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "261QM2800X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Methadone",
            "state": "NU",
            "license": null,
            "primary": true
        },
        {
            "code": "261QR0405X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Rehabilitation, Substance Use Disorder",
            "state": "NU",
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "008130776",
            "state": "CT"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "008130777",
            "state": "CT"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Guilford Clinic",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Guilford, CT

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.