MS. HELEN CATHERINE LONERGAN-THOMAS APN, CCNS-BC
NPI 1720221088
Clinical Nurse Specialist - Acute Care in Oak Lawn, IL

Q: What is Helen Lonergan-thomas's NPI number?

The NPI number for Helen Lonergan-thomas is 1720221088. It was assigned to this individual provider in the NPPES registry on April 15, 2009.

Q: What is Helen Lonergan-thomas's specialty?

The primary specialty registered for this NPI is Clinical Nurse Specialist, specializing in Acute Care, with taxonomy code 364SA2100X.

Active since April 15, 2009PECOS EnrolledAccepts Medicare Assignment

10837 S CICERO AVE STE 200, OAK LAWN, IL 60453(708) 636-7575(708) 636-6193 Get Directions Write a Review

NPPES record last updated: April 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Ms. Helen Catherine Lonergan-thomas Apn, Ccns-bc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. HELEN CATHERINE LONERGAN-THOMAS APN, CCNS-BC (NPI 1720221088) is an individual acute care provider in Oak Lawn, Illinois, licensed in Illinois (209.007100) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS, is affiliated with Advocate Christ Hospital & Medical Center, and maintains a secondary practice location in Downers Grove.

NPPES Registry Identity

NPI1720221088

Entity TypeIndividualFemale

Primary Taxonomy364SA2100X

Provider Legal NameMS. HELEN CATHERINE LONERGAN-THOMASCredential: APN, CCNS-BC

Location Address10837 S CICERO AVE STE 200Oak Lawn, IL 60453-6459

Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900

Phone(708) 636-7575

Fax(708) 636-6193

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateApril 15, 2009

Last NPPES UpdateApril 14, 2025

NPPES CertifiedApril 14, 2025

✔ NPI 1720221088 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical Nurse Specialist · Acute CarePhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code364SA2100X

License✔ Licensed in IL · 209.007100

10837 S CICERO AVE STE 200, Oak Lawn, IL 60453

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Secondary Practice Location 1

Location 13825 Highland AveDowners Grove, IL 60515-1552 · Phone (630) 719-4799 · Fax (630) 963-7420

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Helen Catherine Lonergan-thomas Apn, Ccns-bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1951455682

PECOS Enrollment IDI20100318000406

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Helen Lonergan-thomas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Advocate Health And Hospitals Corporation

1.7 mi

Mental Health (Including Community Mental Health Center)

4700 W 95TH ST, SUITE LOWER LEVEL 5
Oak Lawn, IL 60453

Reassigned Medicare billing, Illinois enrollment
4,870 clinicians in this Medicare group

NPI 1174747075 (800) 216-1110

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

335 services137 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Advocate Christ Hospital & Medical Center

Acute Care Hospitals · Oak Lawn, IL

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140208

Location4440 W 95th StreetOak Lawn, IL 60453 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60453 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ABDULWAHAB HRITANI MD

Internal Medicine (Cardiovascular Disease)