NPPES file of Aug 9, 2026

Mary Margaret Keenan

Gerontology Nurse Practitioner · Peoria, IL

Mary Margaret Keenan is a gerontology nurse practitioner with a practice address in Peoria, Illinois, and NPI 1124988944, issued on Nov 14, 2025. Check the license (Illinois 209035156, 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
1124988944
Name
Mary Margaret Keenan
Primary taxonomy
Gerontology Nurse Practitioner 363LG0600X
License numbers
209035156 IL
41513787 IL
Self-reported in NPPES; status is on the state search
Practice location
200 E Pennsylvania Ave, Peoria, IL 61603
Phone
(309) 624-4000
Enumerated
Nov 14, 2025
Record last updated
Apr 10, 2026
Medicare enrollment
Enrolled (PECOS I20260415000922); 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 gerontology nurse practitioner records → All 292 in Illinois → Look up another NPI →

Also registered at 200 E Pennsylvania Ave

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

  1. Angela Adams, APRNFamily Nurse Practitioner1922687938
  2. Leena Geetha Adhikesavan, M.DInternal Medicine Physician1689735201
  3. Kenneth ArnettAllergy Physician1437249760
  4. Sharon Aycock, PA-CPhysician Assistant1104813997
  5. James Bauer, M.D.Internal Medicine Physician1912901711
  6. Stephanie Beckstrom, APNNurse Practitioner1487127734

Verify Mary Margaret Keenan 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 209035156    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. Osf Multi-Specialty GroupPeoria, IL

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

Mary Margaret Keenan among 292 gerontology nurse practitioner records in Illinois

Mary Margaret Keenan is one of 292 gerontology nurse practitioner records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 88% of them.

  • NPI issued2025 · 88% of these records are older, 3% newer
  • In a Medicare fileYes · 80% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2025 · median 2019 among the 201 with a school on file
  • Record last updated2026 · 34% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LG0600X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gerontology Nurse Practitioner providers in Illinois

There are 292 gerontology nurse practitioner records in Illinois.

All 292 in Illinois → Every provider in Peoria → Gerontology Nurse Practitioner nationwide →

The 8 gerontology nurse practitioner records with the nearest ZIP codes

  1. Heather Larson, AGACNP-BCPeoria, IL 616031114724317
  2. Ashley Pribble, DNPPeoria, IL 616031851016745
  3. Danette Wilkinson, ANPPeoria, IL 616031962169938
  4. Emily CoronaPeoria, IL 616061972242188
  5. Madison Dunham, APRNPeoria, IL 616061568244994
  6. Kyle Faris, ACNPC-AGPeoria, IL 616061588480685
  7. Justyna Koscielniak, APRN, CNPPeoria, IL 616061902571235
  8. Aaron Owens, NPPeoria, IL 616061265070494

Common questions

What is Mary Margaret Keenan's NPI number?

Mary Margaret Keenan's National Provider Identifier (NPI) is 1124988944, issued on Nov 14, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Mary Margaret Keenan located?

The NPPES record lists a practice address at 200 E Pennsylvania Ave, Peoria, IL, 61603. Phone: (309) 624-4000. Providers update this record themselves, so call before visiting.

How can I verify Mary Margaret Keenan's license?

NPPES lists Illinois license number 209035156, 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.