Organization Active NPI

Osei Psychological Services PLLC

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Brooklyn, NY
National Provider Identifier
1720855158
Registry record updated Feb 4, 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
OSEI PSYCHOLOGICAL SERVICES PLLC
Practice address
26 Court St Ste 409
Brooklyn, NY 11242-1134
Phone
(347) 695-8715
NPI assigned
Dec 6, 2023
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Feb 4, 2026

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

Authorized official

Name
Dr. William N Osei, PH.D.NPI 1992322960
Title
Executive Director
Phone
(215) 806-7908

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

26 Court St Ste 409
Brooklyn, NY 11242-1134

Mailing address

26 Court St Ste 409
Brooklyn, NY 11242-1134
Phone (347) 695-8715

Other names 1

  • Osei Psychological Services Doing business as

National Provider Directory

National Provider Directory

Practitioners & affiliated clinicians

Practitioners 3

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

NPI Registry JSON

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

{
    "created_epoch": "1701820800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1770163200000",
    "number": "1720855158",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "26 COURT ST STE 409",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112421134",
            "telephone_number": "347-695-8715"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "26 COURT ST STE 409",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112421134",
            "telephone_number": "347-695-8715"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "OSEI PSYCHOLOGICAL SERVICES PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2023-12-06",
        "last_updated": "2026-02-04",
        "certification_date": "2026-02-04",
        "status": "A",
        "authorized_official_last_name": "OSEI",
        "authorized_official_first_name": "WILLIAM",
        "authorized_official_middle_name": "N",
        "authorized_official_title_or_position": "EXECUTIVE DIRECTOR",
        "authorized_official_telephone_number": "215-806-7908",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "PH.D."
    },
    "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": [
        {
            "organization_name": "Osei Psychological Services",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Brooklyn, NY

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 4, 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.