Cassie Wiersema
Nurse Practitioner · Sterling, IL
Cassie Wiersema is a nurse practitioner with a practice address in Sterling, Illinois, and NPI 1194127977, issued on Sep 23, 2014. Check the license (Illinois 209011772, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassie Wiersema
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 209011772 IL
Self-reported in NPPES; status is on the state search - Practice location
- 101 E Miller RD, Sterling, IL 61081
- Phone
- (815) 625-4790
- Enumerated
- Sep 23, 2014
- Record last updated
- Jul 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150407000759); 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 101 E Miller RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Janice Andersen, N.P.Nurse Practitioner1235211251
- Melissa Armstrong, NPNurse Practitioner1194150862
- Tracey Aude, CNPNurse Practitioner1487734448
Verify Cassie Wiersema in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209011772Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average nurse practitioner in 2024
3,793 Medicare Part D claims for 305 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 70 claims were for opioids.
Most prescribed
- Atorvastatin Calcium331 claims
- Levothyroxine Sodium200 claims
- Lisinopril149 claims
- Amlodipine Besylate101 claims
- Losartan Potassium96 claims
- Potassium Chloride92 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
- Cgh Medical CenterSterling, IL · Acute Care Hospitals1 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.
Cassie Wiersema among 4,892 nurse practitioner records in Illinois
Cassie Wiersema 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 2014, is newer than 28% of them.
- NPI issued2014 · 28% of these records are older, 69% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2014 · median 2018 among the 3,389 with a school on file
- Record last updated2021 · 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).
34 nurse practitioner records list a practice address in Sterling
They are 34 of the 366 NPPES records with a practice address in Sterling, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Sterling → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Janice Andersen, N.P.Sterling, IL 610811235211251
- Melissa Armstrong, NPSterling, IL 610811194150862
- Tracey Aude, CNPSterling, IL 610811487734448
- Stephanie Ernst, FNPSterling, IL 610811902236953
- Virginia Heal, CNPSterling, IL 610811346292034
- Meredith Johnson, NPSterling, IL 610811154419778
- Dianne Limesand, APN, FNP-BCSterling, IL 610811336141407
- Kristine Morland-Schultz, APNSterling, IL 610811922383280
Common questions
What is Cassie Wiersema's NPI number?
Cassie Wiersema's National Provider Identifier (NPI) is 1194127977, issued on Sep 23, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Cassie Wiersema located?
The NPPES record lists a practice address at 101 E Miller RD, Sterling, IL, 61081. Phone: (815) 625-4790. Providers update this record themselves, so call before visiting.
How can I verify Cassie Wiersema's license?
NPPES lists Illinois license number 209011772, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Cassie Wiersema prescribe under Medicare Part D?
In 2024, Cassie Wiersema had 3,793 Medicare Part D claims for 305 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.