William Nana Osei, PHD

Primary specialty

PsychologistTaxonomy code 103T00000X

License

024706 Issued in NY

Practice address

26 Court St Ste 409
Brooklyn, NY 11242-1134

Phone

(347) 695-8715

NPI assigned

Jun 25, 2020

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY, PA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 2

Specialty

Clinical Psychologist

Education

Other, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

Practice roles

Locations

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.

• Grow Healthcare Group PA

  • Mental Health Counselor
  • Miami, FL
  • NPI 1245845932

  NY, PA, Psychologist

  Medicare reassignment NPD
• Osei Psychological Services PLLC

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Brooklyn, NY
  • NPI 1720855158
  NPD Authorized official
• Osei Psychological Services PLLC

  • Psychologist
  • Telford, PA
  • NPI 1144171463
  NPD Authorized official
• Nyc Psychiatrist Services P.C.

  • Psychiatry Physician
  • Brooklyn, NY
  • NPI 1598236283
  NPD (past)

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

{
    "created_epoch": "1593043200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764633600000",
    "number": "1992322960",
    "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": {
        "last_name": "OSEI",
        "first_name": "WILLIAM",
        "middle_name": "NANA",
        "name_prefix": "Dr.",
        "credential": "PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-06-25",
        "last_updated": "2025-12-02",
        "certification_date": "2025-12-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "PA",
            "license": "PS020493",
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "NY",
            "license": "024706",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Adjoa Osei, PSY.D.
• Florence Ernestina Osei
• Nana Akoto-Asare Osei, MD
• Nana Yaa Osei, MSW
• Solomon A Osei, MD FACOG
• Magdana Osepaishvili
• Alice Oshima, LCSW
• Joseph A Osho, M.D.
• Richard L. Oshrain, D.M.D.
• Yakov Oshry

• Psychologist in Brooklyn, NY
• Providers in Brooklyn, NY by specialty
• Psychologist in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 2, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.