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

MS. Helen Catherine Lonergan-Thomas, APN, CCNS-BC

Individual provider Acute Care Clinical Nurse Specialist · NPI 1720221088

MS. Helen Catherine Lonergan-Thomas, APN, CCNS-BC is a Certified Clinical Nurse Specialist (Cns) in Oak Lawn, Illinois. Qualified in 2007, 19 years ago. Practices with Advocate Health and Hospitals Corporation, a 3,079-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
19
Licensed in
IL
In the registry since
2009
What do these letters mean?
APN — Advanced Practice Nurse
The umbrella title some states use for nurse practitioners and other advanced practice nurses.

See every abbreviation used in this directory →

Practice location Address checks out

10837 S Cicero Ave Ste 200
Oak Lawn, IL 60453-6459
Phone: (708) 636-7575
Fax: (708) 636-6193
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3825 Highland Ave, Downers Grove, IL 60515-1552 — (630) 719-4799

Specialties & licences

Acute Care Clinical Nurse Specialist (primary) Taxonomy 364SA2100X · Licence 209.007100 (IL)

Record details

NPI number1720221088
Entity typeIndividual (Type 1)
GenderFemale
Credentials APN , CCNS-BC
Sole proprietorNo
NPI enumeratedApril 15, 2009
Last updated in NPPESApril 14, 2025
Certification dateApril 14, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCERTIFIED CLINICAL NURSE SPECIALIST (CNS)
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Advocate Health And Hospitals Corporation — 3079 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare