Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Guillermo Alfredo Marroquin Galvez, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1104104736

Guillermo Alfredo Marroquin Galvez, MD practises Obstetrics/Gynecology in Detroit Lakes, Minnesota. Qualified in 2009, 17 years ago. Practices with St Marys Regional Health Center, a 188-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Minnesota and Wyoming.

Years since qualifying
17
Licensed in
MN, WY
In the registry since
2011
Specialties on file
2
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

1027 Washington Ave
Detroit Lakes, MN 56501-3409
Phone: (218) 847-5611
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3000 College Dr, Rock Springs, WY 82901-4202 — (307) 362-1861

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 61129 (MN)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 10110A (WY)

Record details

NPI number1104104736
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 1, 2011
Last updated in NPPESJuly 21, 2022

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice St Marys Regional Health Center — 188 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Melanoma (skin cancer) excision 1–10 times
Removal of the uterus 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients34
Services billed 86 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

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 $255 2 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $231 4 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.

  • Essentia Health Hospital · Fargo, ND
  • Essentia Health St Marys - Detroit Lakes Hospital · Detroit Lakes, MN

Colleagues at St Marys Regional Health Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 188 clinicians in the practice; 12 are shown here.

Other providers in Detroit Lakes