HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / IL

SHEILA M TREFTZ, NP

NURSE PRACTITIONER

Graduated: 2001

Offers telehealth

NPI: 1023074051

Practice Locations (4)

SIGMA HEALTH PC

900 TECHNOLOGY WAY, SUITE 120

LIBERTYVILLE, IL 600485364

7083640261

SIGMA HEALTH PC

1924 SPRINGBROOK SQUARE DR

NAPERVILLE, IL 605645963

7083640261

SIGMA HEALTH PC

10640 165TH ST

ORLAND PARK, IL 604678734

SIGMA HEALTH PC

10640 W 165TH ST

ORLAND PARK, IL 604678734

7083640261

Source: CMS National Downloadable File, September 2026.