Karen C. Knaak, APN
Nurse Practitioner · Peoria, IL
Karen C. Knaak, APN is a nurse practitioner with a practice address in Peoria, Illinois, and NPI 1396254728, issued on Sep 28, 2017. Check the license (Illinois 209015907, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karen C. Knaak
- Credential
- APN
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 209015907 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5405 N Knoxville Ave, Peoria, IL 61614
- Phone
- (309) 691-4410
- Enumerated
- Sep 28, 2017
- Record last updated
- Jul 21, 2022
- Fax
- (309) 692-4730
- Medicare enrollment
- Enrolled (PECOS I20171115001779); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 5405 N Knoxville Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen C. Knaak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209015907Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average nurse practitioner in 2024
1,133 Medicare Part D claims for 384 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Rosuvastatin Calcium129 claims
- Jardiance119 claims
- Furosemide92 claims
- Metoprolol Succinate81 claims
- Lisinopril76 claims
- Amlodipine Besylate56 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.
Industry payments in 2024: $430.26
6 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Osf Multi-Specialty GroupPeoria, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen C. Knaak among 4,892 nurse practitioner records in Illinois
Karen C. Knaak, APN is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 42% of them.
- NPI issued2017 · 42% of these records are older, 53% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2016 · median 2018 among the 3,389 with a school on file
- Record last updated2022 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
182 nurse practitioner records list a practice address in Peoria
They are 182 of the 4,621 NPPES records with a practice address in Peoria, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Peoria → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Julie Alms-Dubois, APNPeoria, IL 616141497716823
- Donna Brenenstall, APNPeoria, IL 616141407817422
- Mary Brennan, NPPeoria, IL 616141396789509
- Karen Bussone, ACNPPeoria, IL 616141487661948
- Pooja Clary, APNPeoria, IL 616141063865400
- Lauren Cowherd, APNPeoria, IL 616141366787814
- Lisa Heck, APNPeoria, IL 616141427285626
- Heather Howell, APNPeoria, IL 616141699128892
Common questions
What is Karen C. Knaak, APN's NPI number?
Karen C. Knaak, APN's National Provider Identifier (NPI) is 1396254728, issued on Sep 28, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Karen C. Knaak, APN located?
The NPPES record lists a practice address at 5405 N Knoxville Ave, Peoria, IL, 61614. Phone: (309) 691-4410. Providers update this record themselves, so call before visiting.
How can I verify Karen C. Knaak, APN's license?
NPPES lists Illinois license number 209015907, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Karen C. Knaak, APN prescribe under Medicare Part D?
In 2024, Karen C. Knaak, APN had 1,133 Medicare Part D claims for 384 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.