Individual provider Active NPI

Stephanie Onyeforo

  • Psychiatric/Mental Health Nurse Practitioner
  • Barrington, IL
National Provider Identifier
1942816665
Registry record updated Aug 14, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X
License
209018176 Issued in IL
Practice address
135 Park Ave Ste LL7
Barrington, IL 60010-4370
Phone
(815) 717-4705
Fax
(815) 717-4365
NPI assigned
Sep 17, 2020
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 14, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Family Nurse Practitioner 363LF0000X 209018176 IL
Psychiatric/Mental Health Nurse Practitioner 363LP0808X 209018176 IL Primary

Addresses

Primary practice location

135 Park Ave Ste LL7
Barrington, IL 60010-4370

Mailing address

135 Park Ave Ste LL7
Barrington, IL 60010-4370
Phone (815) 717-4705

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20210630003370 IL Practitioner - Nurse Practitioner 7719388503

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2019
Medicare assignment
May accept Medicare assignment
Telehealth
Offers telehealth services

Practice addresses (Care Compare)

145 S Virginia St
Suite C
Crystal Lake, IL 60014-7226

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Integral Behavioral Health Services Psychiatric/Mental Health CurrentSince Jun 9, 2026 Accepting new patients
The Mathers Clinic LLC CurrentSince May 1, 2021 Accepting new patients
Mathers Clinic LLC Current Accepting new patients

Locations

135 Park Ave
Ste LL7
Barrington, IL 60010

145 S Virginia St
Crystal Lake, IL 60014
Phone (815) 397-7654

145 S Virginia St
Ste C
Crystal Lake, IL 60014
Phone (815) 363-6055

420 Airport Rd
Ste C
Elgin, IL 60123
Phone (815) 444-9999

Organizations & group practices 3

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.

NPI Registry JSON

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

{
    "created_epoch": "1600300800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786665600000",
    "number": "1942816665",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "135 PARK AVE STE LL7",
            "city": "BARRINGTON",
            "state": "IL",
            "postal_code": "600104370",
            "telephone_number": "815-717-4705",
            "fax_number": "815-717-4365"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "135 PARK AVE STE LL7",
            "city": "BARRINGTON",
            "state": "IL",
            "postal_code": "600104370",
            "telephone_number": "815-717-4705",
            "fax_number": "815-717-4365"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ONYEFORO",
        "first_name": "STEPHANIE",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-09-17",
        "last_updated": "2026-08-14",
        "certification_date": "2026-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "IL",
            "license": "209018176",
            "primary": false
        },
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "IL",
            "license": "209018176",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Barrington, IL

Sources for this page

Verify at the official NPI Registry.