Cornelia B. Masak, APNP, RN
- Medicare patients, 2024
- 47
- Part D claims, 2024
- 349
- Hospital affiliations
- 3
- Industry payments
- $195
- Medical group
- 1
- Practice address
- 1818 N Meade St, Appleton, WI 54911
- Practice phone
- Call (920) 731-4101
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Cornelia Masak'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.
Cornelia B. Masak is a nurse practitioner in Appleton, Wisconsin
Cornelia Masak practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health.
Cornelia Masak's NPI, 1740319516, was assigned on March 5, 2007. Cornelia Masak holds Wisconsin license 93688.
- NPI
- 1740319516NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224499306
- NPI enumeration date
- March 5, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 731-4101
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Cornelia B. Masak practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin
Cornelia Masak's primary practice is ThedaCare Regional Medical Center-Appleton, at 1818 N Meade St, Appleton, WI 54911 in Outagamie County. The practice phone is (920) 731-4101.
- ThedaCare Regional Medical Center-Appleton1818 N Meade St, Appleton, WI 54911 · Outagamie CountyPhone(920) 731-4101
Source: Dmand AI Affiliation Data
Cornelia B. Masak is affiliated with 3 sites of care and 1 medical group
Cornelia Masak's primary practice is ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health. Cornelia Masak is also affiliated with ThedaCare Regional Medical Center-Neenah. The medical group on file is Women's Health Specialists, SC. Dmand AI also links Cornelia Masak to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Cornelia B. Masak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cornelia Masak practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ThedaCare Regional Medical Center-Appleton | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Cornelia B. Masak is one of 3,198 nurse practitioners in Wisconsin
Nurse practitioner is Cornelia Masak's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Cornelia Masak is licensed in Wisconsin.
Specialties and state licenses
- Nurse practitioner, WisconsinPrimary
Nurse practitioners near Cornelia Masak
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
Cornelia B. Masak treated 47 Medicare patients in 2024, average age 69
CMS counts 47 Medicare patients who saw Cornelia Masak in 2024. The largest group is 65 to 74, with 34 patients. 70% of them have high cholesterol, and 47% have high blood pressure. Their average risk score is 0.62, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Cornelia Masak's median patient age at 48, with 100% women.
Cornelia Masak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Cornelia Masak's Medicare patients, 2024
- High cholesterol70%
- High blood pressure47%
- Arthritis40%
- Osteoporosis30%
Share of Medicare patients with each condition. A patient can have several.
Cornelia Masak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women100%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cornelia B. Masak wrote 349 Medicare Part D claims in 2024
In 2024, Cornelia Masak wrote 349 Medicare Part D claims for 84 patients. 87% of them were for generic drugs.
Cornelia Masak's Part D claims by kind of drug, 2024
- Generic302 claims87%
- Brand-name47 claims13%
Drug classes CMS tracks in Cornelia Masak's Part D claims, 2024
- Antibiotics7%23 of 349 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 Cornelia B. Masak takes part in Medicare
Cornelia Masak 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
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Cornelia B. Masak received $195 in industry payments in 2025
CMS Open Payments shows 5 general payments to Cornelia Masak from 4 drug and device companies in 2025. Education make up the largest share, 51% of the total. Astellas Pharma US Inc paid the most, $99.
General payments to Cornelia Masak by kind, 2025 to 2025
- Education$9951%
- Food and beverage$9649%
Companies that paid Cornelia Masak 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 Cornelia B. Masak'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 Cornelia B. Masak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Cornelia B. Masak's NPI number?
Cornelia B. Masak's NPI number is 1740319516. It was assigned on March 5, 2007, and it is active in the NPI Registry.
What does Cornelia B. Masak specialize in?
Cornelia B. Masak is a nurse practitioner in Appleton, Wisconsin. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Cornelia B. Masak practice?
Cornelia Masak practices at 1818 N Meade St, Appleton, WI 54911. Cornelia Masak's primary practice is ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health. Dmand AI also links Cornelia Masak to 1 hospital.
What is Cornelia B. Masak's office phone number?
The practice phone on file for Cornelia Masak is (920) 731-4101.
What is Cornelia B. Masak's medical license number?
Cornelia Masak holds Wisconsin license 93688.
Which hospitals is Cornelia B. Masak affiliated with?
Cornelia Masak practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin. Cornelia Masak is also affiliated with ThedaCare Regional Medical Center-Neenah. Dmand AI links Cornelia Masak to 1 more hospital.
What medical group is Cornelia B. Masak part of?
Cornelia Masak is linked to Women's Health Specialists, SC.
Does Cornelia B. Masak accept Medicare?
Yes. CMS lists Cornelia Masak as accepting Medicare assignment.
How many Medicare patients does Cornelia B. Masak see?
CMS counts 47 Medicare patients who saw Cornelia Masak in 2024, with an average age of 69.
Has Cornelia B. Masak received payments from drug or device companies?
CMS Open Payments shows $195 in general payments to Cornelia Masak from 4 companies from 2025 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Cornelia B. Masak been practicing?
Cornelia Masak graduated from medical school in 1984, 42 years ago.
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