The 99 Psychiatric Services Inc

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

Legal business name

THE 99 PSYCHIATRIC SERVICES INC

Doing business as

99 Psych

Practice address

1 Mid America PLZ
Oakbrook Terrace, IL 60181-4450

Phone

(773) 800-6074

NPI assigned

Apr 29, 2025

Organization subpart

No

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

Authorized official

Name

Chinenye Onakorame, APNNPI 1588487946

Title

Manager

Phone

(469) 915-4211

Specialties & licenses 1

Addresses

Other names 1

• 99 Psych Doing business as

Medicare fee-for-service enrollment

Enrolled in IL

Enrollment records 1

Locations

Practitioners 1

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.

• Chinenye Joy Onakorame, APRN, PMHNP BC

  • Psychiatric/Mental Health Nurse Practitioner
  • Naperville, IL
  • NPI 1588487946
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1745884800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1767830400000",
    "number": "1861280760",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 MID AMERICA PLZ",
            "city": "OAKBROOK TERRACE",
            "state": "IL",
            "postal_code": "601814450",
            "telephone_number": "224-614-1233"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 MID AMERICA PLZ",
            "city": "OAKBROOK TERRACE",
            "state": "IL",
            "postal_code": "601814450",
            "telephone_number": "773-800-6074"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "THE 99 PSYCHIATRIC SERVICES INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-04-29",
        "last_updated": "2026-01-08",
        "certification_date": "2026-01-08",
        "status": "A",
        "authorized_official_last_name": "ONAKORAME",
        "authorized_official_first_name": "CHINENYE",
        "authorized_official_title_or_position": "MANAGER",
        "authorized_official_telephone_number": "469-915-4211",
        "authorized_official_credential": "APN"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "99 Psych",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "99 Psych",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

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• Psychiatric/Mental Health Nurse Practitioner in Oakbrook Terrace, IL
• Providers in Oakbrook Terrace, IL by specialty
• Psychiatric/Mental Health Nurse Practitioner in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 8, 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.