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

Dr. Marie Denise Alfonso Guanzon, MD

Individual provider Hospitalist Physician · NPI 1780664631

Dr. Marie Denise Alfonso Guanzon, MD practises Internal Medicine in St Cloud, Minnesota. Qualified in 1995, 31 years ago. Practices with Centracare Clinic, a 782-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Minnesota and North Dakota.

Years since qualifying
31
Licensed in
MN, ND
In the registry since
2006
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

1200 Sixth Ave N Centracare Clinic
St Cloud, MN 56303-2735 Not confirmed with CMS for 15 years — call before visiting
Phone: (701) 530-7000
Fax: (701) 530-8842
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 53336 (MN)
Hospitalist Physician Taxonomy 208M00000X · Licence 9430 (ND)
Allergy & Immunology Physician Taxonomy 207K00000X · Licence 53336 (MN)

Record details

NPI number1780664631
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 18, 2006
Last updated in NPPESApril 28, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesALLERGY/IMMUNOLOGY
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice Centracare Clinic — 782 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations10 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.

Upper gastrointestinal (GI) endoscopy for acid reflux 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 patients394
Services billed 1,342 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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. Those with a page here are linked.

  • Centracare - St. Cloud Hospital Hospital · Saint Cloud, MN · listed as St Cloud Hospital
  • Centracare Health - Monticello Hospital · Monticello, MN · listed as Centracare Health Monticello Services LLC
  • Adara Home Health Inc Home health agency · Buffalo, MN · listed as Adara Home Health, Inc
  • St Gabriels Hospital Hospital · Little Falls, MN
  • Centracare Home Health Home health agency · Waite Park, MN
  • Country Manor Extended Services Home health agency · Sartell, MN

Colleagues at Centracare Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 782 clinicians in the practice; 12 are shown here.

Other providers in St Cloud