Cassie L. Wiersema
- Medicare patients, 2024
- 130
- Part D claims, 2024
- 3,793
- Hospital affiliations
- 1
- Industry payments
- $49
- Medical group
- 1
- Practice address
- 100 East Lefevre Road, Sterling, IL 61081
- Practice phone
- Call (815) 625-0400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Cassie Wiersema's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Cassie L. Wiersema is a nurse practitioner in Sterling, Illinois
Cassie Wiersema practices at CGH Medical Center in Sterling, Illinois, part of City of Sterling.
Cassie Wiersema's NPI, 1194127977, was assigned on September 23, 2014. Cassie Wiersema holds Illinois license 209011772.
- NPI
- 1194127977NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618295403
- NPI enumeration date
- September 23, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 625-0400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cassie L. Wiersema practices at CGH Medical Center in Sterling, Illinois
Cassie Wiersema's primary practice is CGH Medical Center, at 100 East Lefevre Road, Sterling, IL 61081 in Whiteside County. The practice phone is (815) 625-0400.
- CGH Medical Center100 East Lefevre Road, Sterling, IL 61081 · Whiteside CountyPhone(815) 625-0400
Source: Dmand AI Affiliation Data
Cassie L. Wiersema is affiliated with 2 sites of care and 1 medical group
Cassie Wiersema's primary practice is CGH Medical Center in Sterling, Illinois, part of City of Sterling. The medical group on file is CGH Medical Center. Dmand AI also links Cassie Wiersema to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Cassie L. Wiersema's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cassie Wiersema practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CGH Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across City of Sterling and 6.2K+ hospitals, with verified contacts in the same login.
Cassie L. Wiersema is one of 4,254 nurse practitioners in Illinois
Nurse practitioner is Cassie Wiersema's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Cassie Wiersema is licensed in Illinois.
Specialties and state licenses
- Nurse practitioner, IllinoisPrimary
Nurse practitioners near Cassie Wiersema
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Cassie L. Wiersema treated 130 Medicare patients in 2024, average age 71
CMS counts 130 Medicare patients who saw Cassie Wiersema in 2024. The largest group is 65 to 74, with 73 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 21% are also on Medicaid. Their average risk score is 0.71, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Cassie Wiersema's median patient age at 70, with 71% women.
Cassie Wiersema's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Cassie Wiersema's Medicare patients by sex, 2024
- Women9775%
- Men3325%
Chronic conditions among Cassie Wiersema's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis35%
- Diabetes26%
- Anxiety22%
- Mood disorders22%
- COPD18%
- Ischemic heart disease18%
Share of Medicare patients with each condition. A patient can have several.
Cassie Wiersema's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women71%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cassie L. Wiersema wrote 3,793 Medicare Part D claims in 2024
In 2024, Cassie Wiersema wrote 3,793 Medicare Part D claims for 305 patients. 85% of them were for generic drugs.
Cassie Wiersema's Part D claims by kind of drug, 2024
- Generic3,229 claims85%
- Brand-name538 claims14%
- Other26 claims1%
Drug classes CMS tracks in Cassie Wiersema's Part D claims, 2024
- Opioids2%70 of 3,793 claims
- Antibiotics1%54 of 3,793 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Cassie L. Wiersema takes part in Medicare
Cassie Wiersema accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Cassie L. Wiersema received $49 in industry payments in 2025
CMS Open Payments shows 2 general payments to Cassie Wiersema from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Inspire Medical Systems, Inc. paid the most, $30.
Companies that paid Cassie Wiersema the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Cassie L. Wiersema's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Cassie L. Wiersema
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Cassie L. Wiersema's NPI number?
Cassie L. Wiersema's NPI number is 1194127977. It was assigned on September 23, 2014, and it is active in the NPI Registry.
What does Cassie L. Wiersema specialize in?
Cassie L. Wiersema is a nurse practitioner in Sterling, Illinois. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Cassie L. Wiersema practice?
Cassie Wiersema practices at 100 East Lefevre Road, Sterling, IL 61081. Cassie Wiersema's primary practice is CGH Medical Center in Sterling, Illinois, part of City of Sterling. Dmand AI also links Cassie Wiersema to 1 group practice or clinic.
What is Cassie L. Wiersema's office phone number?
The practice phone on file for Cassie Wiersema is (815) 625-0400.
What is Cassie L. Wiersema's medical license number?
Cassie Wiersema holds Illinois license 209011772.
Which hospitals is Cassie L. Wiersema affiliated with?
Cassie Wiersema practices at CGH Medical Center in Sterling, Illinois.
What medical group is Cassie L. Wiersema part of?
Cassie Wiersema is linked to CGH Medical Center.
Does Cassie L. Wiersema accept Medicare?
Yes. CMS lists Cassie Wiersema as accepting Medicare assignment.
How many Medicare patients does Cassie L. Wiersema see?
CMS counts 130 Medicare patients who saw Cassie Wiersema in 2024, with an average age of 71.
Has Cassie L. Wiersema received payments from drug or device companies?
CMS Open Payments shows $49 in general payments to Cassie Wiersema from 2 companies from 2025 to 2025. The largest total came from Inspire Medical Systems, Inc.
How long has Cassie L. Wiersema been practicing?
Cassie Wiersema graduated from medical school in 2014, 12 years ago.
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