NPPES file of Aug 9, 2026

Elizabeth Diemer

Family Nurse Practitioner · Pontiac, IL

Elizabeth Diemer is a family nurse practitioner with a practice address in Pontiac, Illinois, and NPI 1699539577, issued on Feb 12, 2024. Check the license (Illinois 209029298, 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
1699539577
Name
Elizabeth Diemer
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
209029298 IL
041377192 IL
Self-reported in NPPES; status is on the state search
Practice location
2500 W Reynolds St Ste 203, Pontiac, IL 61764
Phone
(815) 844-5115
Enumerated
Feb 12, 2024
Record last updated
Feb 12, 2024
Medicare enrollment
Enrolled (PECOS I20240304001970); 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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Verify Elizabeth Diemer 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 209029298    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
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48% fewer Medicare Part D claims than the average family nurse practitioner in 2024

677 Medicare Part D claims for 254 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 16 claims were for opioids.

  1. Elizabeth Diemer677
  2. Specialty average1,305

Most prescribed

  1. Prednisone38 claims
  2. Fluticasone Propionate32 claims
  3. Gabapentin21 claims
  4. Albuterol Sulfate Hfa19 claims
  5. Cephalexin18 claims
  6. Amoxicillin-Clavulanate Potass17 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.

One hospital affiliation

  1. Saint James HospitalPontiac, IL · Acute Care Hospitals4 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

12 family nurse practitioner records list a practice address in Pontiac

They are 12 of the 266 NPPES records with a practice address in Pontiac, and 7,639 family nurse practitioner records in Illinois.

All 12 in Pontiac → All 7,639 in Illinois → Every provider in Pontiac →

Other family nurse practitioner records in Illinois

  1. Crystal Aandahl, FNPNorth Chicago, IL1316497068
  2. Deborah Aaron, FNPChicago, IL1114024916
  3. Roseviminda Abano, CNPGurnee, IL1215318555
  4. Theresa AbbaduskyPekin, IL1265892046
  5. Nadia Abbasi-Kling, FNP-BCChicago, IL1033767736
  6. Manar Abdalla, FNPChicago, IL1700632411
  7. Mahubah Abdallah, FNP-CRochelle, IL1841752284
  8. Rana Abdallah, DNP, APRN, FNP-CLake Villa, IL1851261887
  9. Servet Abdelhafez, APRNBrookfield, IL1790505048
  10. Nadia Abdessalam, FNP-BCOak Lawn, IL1356888283

Common questions

What is Elizabeth Diemer's NPI number?

Elizabeth Diemer's National Provider Identifier (NPI) is 1699539577, issued on Feb 12, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Elizabeth Diemer located?

The NPPES record lists a practice address at 2500 W Reynolds St Ste 203, Pontiac, IL, 61764. Phone: (815) 844-5115. Providers update this record themselves, so call before visiting.

How can I verify Elizabeth Diemer's license?

NPPES lists Illinois license number 209029298, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Elizabeth Diemer prescribe under Medicare Part D?

In 2024, Elizabeth Diemer had 677 Medicare Part D claims for 254 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.

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.