THE 99 PSYCHIATRIC SERVICES INC
NPI 1861280760
Nurse Practitioner - Psychiatric/Mental Health in Oakbrook Terrace, IL
About The 99 Psychiatric Services Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THE 99 PSYCHIATRIC SERVICES INC (NPI 1861280760), doing business as 99 Psych, is a healthcare organization registered as a psychiatric/mental health in Oakbrook Terrace, Illinois and active in the NPI registry since April 2025. The organization lists Chinenye Onakorame, Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
The 99 Psychiatric Services Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to The 99 Psychiatric Services Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is The 99 Psychiatric Services Inc's NPI number?
The NPI number for The 99 Psychiatric Services Inc is 1861280760. It was assigned to this organization in the NPPES registry on April 29, 2025. The provider is doing business as 99 Psych.
Where is The 99 Psychiatric Services Inc located?
The 99 Psychiatric Services Inc is located at 1 Mid America Plz, Oakbrook Terrace, IL 60181. The listed phone number is (773) 800-6074.
What is The 99 Psychiatric Services Inc's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is The 99 Psychiatric Services Inc enrolled in Medicare?
Yes. The 99 Psychiatric Services Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through The 99 Psychiatric Services Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Nurse Practitioner) reassigns their Medicare billing to The 99 Psychiatric Services Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for The 99 Psychiatric Services Inc was last updated on January 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# The 99 Psychiatric Services Inc · NPI 1861280760
Psychiatric/Mental Health organization in Oakbrook Terrace, Illinois. Organization record, active in the CMS NPPES registry since April 29, 2025.
## Identity
- **NPI:** 1861280760 (Entity type: Organization)
- **Enumerated:** April 29, 2025
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **Also known as:** 99 Psych (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Chinenye Onakorame, MANAGER
## Practice location
- **Address:** 1 MID AMERICA PLZ, Oakbrook Terrace, IL 60181-4450
- **Phone:** (773) 800-6074
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Nurse Practitioner) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 8, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1861280760) · Data from the CMS NPPES public registry.