NPPES file of Aug 9, 2026

Katherine S. O'Neil, FNP-BC

Family Nurse Practitioner · Springfield, IL

Katherine S. O'Neil, FNP-BC is a family nurse practitioner with a practice address in Springfield, Illinois, and NPI 1841479896, issued on Oct 26, 2007. Check the license (Illinois 209007805, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1841479896
Name
Katherine S. O'Neil
Credential
FNP-BC
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
209007805 IL
Self-reported in NPPES; status is on the state search
Practice location
2239 E Cook St, Springfield, IL 62703
Phone
(217) 788-2300
Enumerated
Oct 26, 2007
Record last updated
Feb 4, 2016 (not updated in 10 years: call before relying on the address or phone)
Fax
(217) 788-2342
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 7,639 in Illinois → Look up another NPI →

Also registered at 2239 E Cook St

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

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  2. Ashlyn Bartels, FNPFamily Nurse Practitioner1073963120
  3. Mohammed Baseer, M.DInternal Medicine Physician1720272321
  4. Lindsey BirkFamily Nurse Practitioner1174930754
  5. Isabel ButterfieldFamily Nurse Practitioner1154035111
  6. Edgard Cumpa, MDInternal Medicine Physician1497743488

Verify Katherine S. 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 209007805    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

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Industry payments in 2024: $14.98

1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Katherine O'Neil$14.98
  2. Specialty average$650.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Katherine S. O'Neil among 7,639 family nurse practitioner records in Illinois

Katherine S. O'Neil, FNP-BC is one of 7,639 family nurse practitioner records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 5% of them.

  • NPI issued2007 · 5% of these records are older, 92% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2016 · 39% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

309 family nurse practitioner records list a practice address in Springfield

They are 309 of the 4,997 NPPES records with a practice address in Springfield, and 7,639 family nurse practitioner records in Illinois.

All 7,639 in Illinois → Every provider in Springfield → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Angela Anselm, FNP-BCSpringfield, IL 627031679884944
  2. Tammy Bartolomucci, APNSpringfield, IL 627031770721144
  3. Candace Benner, N.P.Springfield, IL 627031932268919
  4. Leona Burnham, FNP-CSpringfield, IL 627031487977427
  5. Mary Dambacher, FNP-BCSpringfield, IL 627031477995611
  6. Michelle Evans, FNPSpringfield, IL 627031639142011
  7. Heather Ey, N.P.Springfield, IL 627031699962597
  8. Richard Foster, A.P.R.N., F.N.P.Springfield, IL 627031073604260

Common questions

What is Katherine S. O'Neil, FNP-BC's NPI number?

Katherine S. O'Neil, FNP-BC's National Provider Identifier (NPI) is 1841479896, issued on Oct 26, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Katherine S. O'Neil, FNP-BC located?

The NPPES record lists a practice address at 2239 E Cook St, Springfield, IL, 62703. Phone: (217) 788-2300. Providers update this record themselves, so call before visiting.

How can I verify Katherine S. O'Neil, FNP-BC's license?

NPPES lists Illinois license number 209007805, 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.