Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mrs. Marianna V Sieracki, PA-C

Individual provider Physician Assistant · NPI 1659786374

Mrs. Marianna V Sieracki, PA-C is a Physician Assistant in Fond Du Lac, Wisconsin. Qualified in 2014, 12 years ago. Practices with Thedacare, Incorporated, a 654-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
12
Licensed in
WI
In the registry since
2014
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

430 E Division St
Fond Du Lac, WI 54935-4560
Phone: (920) 929-2300
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2400 E Capitol Dr, Appleton, WI 54911-8728 — (920) 731-4101
  • 250 W 6th Ave, Oshkosh, WI 54902-5910 — (920) 831-5050

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 3334 (WI)

Record details

NPI number1659786374
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJune 23, 2014
Last updated in NPPESJune 10, 2026
Certification dateJune 10, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Thedacare, Incorporated — 654 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients46
Services billed 56 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Thedacare, Incorporated

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 654 clinicians in the practice; 12 are shown here.

Other providers in Fond Du Lac