NPPES file of Aug 9, 2026

Gavin O'Neil, LISW, LCSW

Clinical Social Worker · Carthage, IL

Gavin O'Neil, LISW, LCSW is a clinical social worker with a practice address in Carthage, Illinois, and NPI 1669152336, issued on Jul 19, 2023. Check the license (Illinois 149025797, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1669152336
Name
Gavin O'Neil
Credential
LISW, LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License numbers
149025797 IL
098983 IA
Self-reported in NPPES; status is on the state search
Practice location
1450 N County Road 2050 E, Carthage, IL 62321
Phone
(217) 357-2173
Enumerated
Jul 19, 2023
Record last updated
Aug 16, 2023
Medicare enrollment
Enrolled (PECOS I20230914000163); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical social worker records → All 13,637 in Illinois → Look up another NPI →

Also registered at 1450 N County Road 2050 E

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Melissa Brewer, FNP-BCFamily Nurse Practitioner1093451338
  2. George Brummell, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1114693181
  3. Lindsay Brummell, LPCProfessional Counselor1235773565
  4. Rosalinda Campos, M.DFamily Medicine Physician1134578420
  5. Mary Clark, RN, CHESHealth & Wellness Coach1548986565
  6. Jacob Harvey, CADCAddiction (Substance Use Disorder) Counselor1679208870

Verify Gavin O'Neil in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 149025797    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Memorial Hospital AssociationCarthage, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gavin O'Neil among 13,637 clinical social worker records in Illinois

Gavin O'Neil, LISW, LCSW is one of 13,637 clinical social worker records with a practice address in Illinois. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 81% of them.

  • NPI issued2023 · 81% of these records are older, 13% newer
  • In a Medicare fileYes · 14% of these records are
  • In the CMS Doctors and Clinicians fileYes · 21% of these records are
  • Graduated2017 · median 2010 among the 2,895 with a school on file
  • Record last updated2023 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

3 clinical social worker records list a practice address in Carthage

They are 3 of the 82 NPPES records with a practice address in Carthage, and 13,637 clinical social worker records in Illinois.

All 13,637 in Illinois → Every provider in Carthage → Clinical Social Worker nationwide →

The 8 clinical social worker records with the nearest ZIP codes

  1. Tammey Gilbert, LCSWCarthage, IL 623211376947242
  2. Debra Hertenstein, LCSWCarthage, IL 623211447517925
  3. Emily HemingCamp Point, IL 623201558125146
  4. Margaret Adrian, LCSWQuincy, IL 623051699665844
  5. Margaret Althide, LCSWQuincy, IL 623051114459146
  6. Jerilyn Dufresne, LCSWQuincy, IL 623051457524035
  7. Teresa Helmedag, LCSWQuincy, IL 623051194905406
  8. Tara Krueger, MSW, LCSWQuincy, IL 623051154547453

Common questions

What is Gavin O'Neil, LISW, LCSW's NPI number?

Gavin O'Neil, LISW, LCSW's National Provider Identifier (NPI) is 1669152336, issued on Jul 19, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Gavin O'Neil, LISW, LCSW located?

The NPPES record lists a practice address at 1450 N County Road 2050 E, Carthage, IL, 62321. Phone: (217) 357-2173. Providers update this record themselves, so call before visiting.

How can I verify Gavin O'Neil, LISW, LCSW's license?

NPPES lists Illinois license number 149025797, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.