NPIMap

Organization Active NPI

Well Behavioral Health LLC

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • New York, NY
National Provider Identifier
1649123464
Registry record updated Feb 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Mental Health Clinic/Center (Including Community Mental Health Center)Taxonomy code 261QM0801X
Legal business name
WELL BEHAVIORAL HEALTH LLC
Practice address
57 W 57TH St Ste 1004
New York, NY 10019-2821
Phone
(888) 961-4709
Fax
(917) 725-8883
NPI assigned
Feb 19, 2026
Last updated
Feb 19, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Feb 19, 2026

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

Authorized official

Name
Greta Marie Gleissner, LCSWNPI 1881928539
Title
Ceo
Phone
(917) 373-4557

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Mental Health Clinic/Center (Including Community Mental Health Center) 261QM0801X Primary

Addresses

Primary practice location

57 W 57TH St Ste 1004
New York, NY 10019-2821

Mailing address

57 W 57TH St Ste 1004
New York, NY 10019-2821
Phone (888) 961-4709

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20260610002619 NY Part B Supplier - Clinic/Group Practice 9537631536 Receives reassigned benefits from 1 practitioner
Practice locations: New York, NY

National Provider Directory

National Provider Directory

Locations

57 W 57th St
Ste 1004
New York, NY 10019
Phone (212) 765-5030

Practitioners & affiliated clinicians

Practitioners 17

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.

View all 17

NPI Registry JSON

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

{
    "created_epoch": "1771459200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1771459200000",
    "number": "1649123464",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "57 W 57TH ST STE 1004",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100192821",
            "telephone_number": "888-961-4709",
            "fax_number": "917-725-8883"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "57 W 57TH ST STE 1004",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100192821",
            "telephone_number": "888-961-4709",
            "fax_number": "917-725-8883"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WELL BEHAVIORAL HEALTH LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-02-19",
        "last_updated": "2026-02-19",
        "certification_date": "2026-02-19",
        "status": "A",
        "authorized_official_last_name": "GLEISSNER",
        "authorized_official_first_name": "GRETA",
        "authorized_official_middle_name": "MARIE",
        "authorized_official_title_or_position": "CEO",
        "authorized_official_telephone_number": "917-373-4557",
        "authorized_official_credential": "LCSW"
    },
    "taxonomies": [
        {
            "code": "261QM0801X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Mental Health (Including Community Mental Health Center)",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New York, NY

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 19, 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.