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

Matthew Trefz, MD

Individual provider Pediatrics Physician · NPI 1376735035

Matthew Trefz, MD is registered under Cardiovascular Disease (Cardiology) in Fargo, North Dakota. Graduated from Sanford School of Medicine of University of South Dakota in 2003, 23 years ago. Practices with Sanford Health of Northern Minnesota, a 349-clinician group and accepts Medicare assignment. Licensed in Minnesota and North Dakota.

Years since qualifying
23
Trained at
Sanford School of Medicine of University of South Dakota
Licensed in
MN, ND
In the registry since
2007
Specialties on file
4
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

801 Broadway N
Fargo, ND 58102-3641
Phone: (701) 234-2568
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 11160 (ND)
Pediatrics Physician Taxonomy 208000000X · Licence 51542 (MN)
Pediatrics Physician Taxonomy 208000000X · Licence 11160 (ND)
Pediatric Cardiology Physician Taxonomy 2080P0202X · Licence 51542 (MN)

Record details

NPI number1376735035
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 15, 2007
Last updated in NPPESMarch 25, 2022
Certification dateMarch 25, 2022

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesPEDIATRIC MEDICINE
Medical schoolSANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated 2003 (23 years in practice)
Group practice Sanford Health Of Northern Minnesota — 349 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients27
Services billed 111 a service is one billed item, such as a visit, a test or a procedure
Average patient age39

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 $72 2 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 Sanford Health of Northern Minnesota

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 349 clinicians in the practice; 12 are shown here.

Other providers in Fargo