Helen Catherine Lonergan-Thomas, APN, CCNS-BC
Acute Care Clinical Nurse Specialist · Oak Lawn, IL
Helen Catherine Lonergan-Thomas, APN, CCNS-BC is an acute care clinical nurse specialist with a practice address in Oak Lawn, Illinois, and NPI 1720221088, issued on Apr 15, 2009. Check the license (Illinois 209.007100, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Helen Catherine Lonergan-Thomas
- Credential
- APN, CCNS-BC
- Primary taxonomy
- Acute Care Clinical Nurse Specialist 364SA2100X
- License number
- 209.007100 IL
Self-reported in NPPES; status is on the state search - Practice location
- 10837 S Cicero Ave Ste 200, Oak Lawn, IL 60453
- Phone
- (708) 636-7575
- Enumerated
- Apr 15, 2009
- Record last updated
- Apr 14, 2025
- Fax
- (708) 636-6193
- Medicare enrollment
- Enrolled (PECOS I20100318000406); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest acute care clinical nurse specialist records → All 35 in Illinois → Look up another NPI →
Also registered at 10837 S Cicero Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Helen Catherine Lonergan-Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209.007100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% fewer Medicare Part D claims than the average acute care clinical nurse specialist in 2024
567 Medicare Part D claims for 172 beneficiaries, against an average of 604 among the 112 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Clopidogrel196 claims
- Brilinta78 claims
- Metoprolol Succinate45 claims
- Atorvastatin Calcium40 claims
- Carvedilol27 claims
- Amlodipine Besylate19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Advocate Health And Hospitals CorporationBuffalo Grove, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Helen Catherine Lonergan-Thomas among 35 acute care clinical nurse specialist records in Illinois
Helen Catherine Lonergan-Thomas, APN, CCNS-BC is one of 35 acute care clinical nurse specialist records with a practice address in Illinois. 49% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 20% of them.
- NPI issued2009 · 20% of these records are older, 74% newer
- In a Medicare fileYes · 49% of these records are
- In the CMS Doctors and Clinicians fileYes · 31% of these records are
- Graduated2007 · median 2007 among the 11 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 364SA2100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Acute Care Clinical Nurse Specialist providers in Illinois
There are 35 acute care clinical nurse specialist records in Illinois.
All 35 in Illinois → Every provider in Oak Lawn → Acute Care Clinical Nurse Specialist nationwide →
The 8 acute care clinical nurse specialist records with the nearest ZIP codes
- Schuyler Perez De Salmeron, MSN APN ACCNS-AGJoliet, IL 604351427690700
- Manisa Baker, APNDowners Grove, IL 605151023479508
- Margaret KearneyDowners Grove, IL 605151598284473
- Annette Mattea, APRNDowners Grove, IL 605151578219374
- Veronica Matticks, APNLa Grange Highlands, IL 605251548706708
- Julie Kozlowski, CNSNaperville, IL 605401932110004
- Mary LyonsNaperville, IL 605401174006290
- Celia Thomas, CNSNaperville, IL 605401932110145
Common questions
What is Helen Catherine Lonergan-Thomas, APN, CCNS-BC's NPI number?
Helen Catherine Lonergan-Thomas, APN, CCNS-BC's National Provider Identifier (NPI) is 1720221088, issued on Apr 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Helen Catherine Lonergan-Thomas, APN, CCNS-BC located?
The NPPES record lists a practice address at 10837 S Cicero Ave Ste 200, Oak Lawn, IL, 60453. Phone: (708) 636-7575. Providers update this record themselves, so call before visiting.
How can I verify Helen Catherine Lonergan-Thomas, APN, CCNS-BC's license?
NPPES lists Illinois license number 209.007100, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Helen Catherine Lonergan-Thomas, APN, CCNS-BC prescribe under Medicare Part D?
In 2024, Helen Catherine Lonergan-Thomas, APN, CCNS-BC had 567 Medicare Part D claims for 172 beneficiaries; the average among acute care clinical nurse specialist prescribers was 604. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.