Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Matthew John Fischer, MD

Individual provider Anesthesiology Physician · NPI 1083000319

Matthew John Fischer, MD practises Anesthesiology in Appleton, Wisconsin. Qualified in 2015, 11 years ago. Practices with Thedacare, Incorporated, a 654-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
11
Licensed in
IL, WI
In the registry since
2015
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2400 E Capitol Dr
Appleton, WI 54911-8728
Phone: (920) 831-5050
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 251 E Huron St # F5-704, Chicago, IL 60611-2908 — (920) 427-1616
  • 820 E Grant St, Appleton, WI 54911-3483 — (920) 831-5050
  • 600 Highland Ave, Madison, WI 53792-0001 — (608) 263-8114

Specialties & licences

Pain Medicine (Anesthesiology) Physician (primary) Taxonomy 207LP2900X · Licence 66250 (WI)
Anesthesiology Physician Taxonomy 207L00000X · Licence 66250 (WI)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 036.148780 (IL)

Record details

NPI number1083000319
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 14, 2015
Last updated in NPPESNovember 13, 2024
Certification dateNovember 13, 2024

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Thedacare, Incorporated — 654 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients274
Services billed 2,982 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,101 18 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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 Appleton