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

Dr. Donald J. Hagler Sr., MD

Individual provider Pediatric Cardiology Physician · NPI 1942206016

Dr. Donald J. Hagler Sr., MD practises Pediatric Medicine in Rochester, Minnesota. Graduated from Saint Louis University School of Medicine in 1968, 58 years ago. Practices with Mayo Clinic Health System-Southwest Minnesota Region, a 667-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Minnesota.

Years since qualifying
58
Trained at
Saint Louis University School of Medicine
Licensed in
AZ, MN
In the registry since
2005
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

200 1st St SW
Rochester, MN 55905-0001
Phone: (507) 284-2511
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 13400 E Shea Blvd, Scottsdale, AZ 85259-5452 — (480) 301-8000

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 21039 (MN)
Pediatric Cardiology Physician Taxonomy 2080P0202X · Licence 24809 (AZ)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 21039 (MN)

Record details

NPI number1942206016
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2005
Last updated in NPPESSeptember 29, 2020
Certification dateSeptember 29, 2020

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1968 (58 years in practice)
Group practice Mayo Clinic Health System-Southwest Minnesota Region — 667 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 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 patients105
Services billed 262 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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.

Travel and Lodging $387 2 payments · travel or lodging paid or reimbursed, such as to attend a conference

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 Mayo Clinic Health System-Southwest Minnesota Region

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 667 clinicians in the practice; 12 are shown here.

Other providers in Rochester