MRS. CORNELIA B MASAK RN, APNP
NPI 1740319516
Nurse Practitioner in Appleton, WI
About Mrs. Cornelia B Masak Rn, Apnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. CORNELIA B MASAK RN, APNP (NPI 1740319516) is an individual nurse practitioner in Appleton, Wisconsin, licensed in Wisconsin (93688) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS, is affiliated with Thedacare Regional Med Ctr - Neenah, and is a graduate of Other (1984).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mrs. Cornelia B Masak Rn, Apnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Cornelia Masak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Appleton, WI 54911
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Womens Health Specialists Sc
- 25 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Thedacare Regional Med Ctr - Neenah
Acute Care Hospitals · Neenah, WIThedacare Regional Medical Center - Appleton Inc
Acute Care Hospitals · Appleton, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54911 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
APPLETON, WI 54911
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Cornelia Masak's NPI number?
The NPI number for Cornelia Masak is 1740319516. It was assigned to this individual provider in the NPPES registry on March 5, 2007.
Where is Cornelia Masak located?
Cornelia Masak practices at 1818 N Meade St, Appleton, WI 54911. The listed phone number is (920) 749-4000.
What is Cornelia Masak's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Cornelia Masak enrolled in Medicare?
Yes. Cornelia Masak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Cornelia Masak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cornelia Masak reassigns Medicare benefits to Women's Health Specialists, S.C. (Appleton, WI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Cornelia Masak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Cornelia Masak accept?
Health plans from Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners, Network Health and Quartz and 1 other insurer list Cornelia Masak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Cornelia Masak affiliated with any hospitals?
According to CMS data, Cornelia Masak is affiliated with Thedacare Regional Med Ctr - Neenah and Thedacare Regional Medical Center - Appleton Inc.
When was this NPI record last updated?
The NPPES record for Cornelia Masak was last updated on November 23, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mrs. Cornelia B Masak, RN, APNP · NPI 1740319516
Nurse Practitioner physician in Appleton, Wisconsin. Individual provider, active in the CMS NPPES registry since March 5, 2007.
## Identity
- **NPI:** 1740319516 (Entity type: Individual)
- **Enumerated:** March 5, 2007
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 93688 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1818 N MEADE ST, Appleton, WI 54911-3454
- **Phone:** (920) 749-4000 · **Fax:** (920) 749-4015
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Women's Health Specialists, S.C. (NPI 1417086216, Appleton, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1984
## Record status
- **NPPES last updated:** November 23, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1740319516) · Data from the CMS NPPES public registry.