Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mainstay Clinics Inc

Organization Nurse Practitioner · NPI 1134622053

Mainstay Clinics Inc provides Nurse Practitioner services in Libertyville, Illinois. Licensed in Illinois. Registered with an NPI since 2018.

Licensed in
IL
In the registry since
2018
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

333 Peterson Rd Ste 240
Libertyville, IL 60048-1085
Phone: (224) 864-2124
Fax: (224) 864-2178
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 209009332 (IL)

Record details

NPI number1134622053
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Alexander Jarosz — Officer · (224) 717-0447
NPI enumeratedMarch 16, 2018
Last updated in NPPESAugust 29, 2025
Certification dateAugust 29, 2025
Mailing address17942 W Pond Ridge Cir, Gurnee, IL 60031-4534

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