The Growth Collaborative Psychology Group LLC

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

Legal business name

THE GROWTH COLLABORATIVE PSYCHOLOGY GROUP LLC

Practice address

8 Pleasant St Ste 2C
Natick, MA 01760-5622

Phone

(781) 971-8598

Fax

(781) 205-1551

NPI assigned

Feb 9, 2026

Organization subpart

No

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

Authorized official

Name

Dr. Hillary Fitzsimmons, PSYDNPI 1295252252

Title

Owner

Phone

(315) 559-9762

Specialties & licenses 1

Addresses

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Hillary Elizabeth Fitzsimmons, PSY.D.

  • Psychologist
  • Ann Arbor, MI
  • NPI 1295252252
  NPD Authorized official

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

{
    "created_epoch": "1770595200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1770595200000",
    "number": "1871444364",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8 PLEASANT ST STE 2C",
            "city": "NATICK",
            "state": "MA",
            "postal_code": "017605622",
            "telephone_number": "781-971-8598",
            "fax_number": "781-205-1551"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8 PLEASANT ST STE 2C",
            "city": "NATICK",
            "state": "MA",
            "postal_code": "017605622",
            "telephone_number": "781-971-8598",
            "fax_number": "781-205-1551"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "THE GROWTH COLLABORATIVE PSYCHOLOGY GROUP LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-02-09",
        "last_updated": "2026-02-09",
        "certification_date": "2026-02-09",
        "status": "A",
        "authorized_official_last_name": "FITZSIMMONS",
        "authorized_official_first_name": "HILLARY",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "315-559-9762",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "PSYD"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Psychologist, Clinical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Olga Terechin, MD
• David A Tesini, DMD
• Lindsey Marie Tetrault, RN
• Frederic H. C. Thai, D.M.D.
• Jennifer Thatcher
• The Metrowest Eye Group, P.C.
• The Metrowest Eye Group, P.C.
• The Nirmel Neurological Institute Inc.
• The Stop & Shop Supermarket Company LLC (Stop and Shop Pharmacy 6)
• The Trainor Center for Cognitive Behavioral Therapy, LLC

• Clinical Psychologist in Natick, MA
• Providers in Natick, MA by specialty
• Clinical Psychologist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.