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

Guy T Alonso, MD

Individual provider Pediatric Endocrinology Physician · NPI 1700012432

Guy T Alonso, MD is a Pediatric Endocrinology Physician in Aurora, Colorado. Works from 2 locations. Licensed in Colorado and Texas.

Licensed in
CO, TX
In the registry since
2009
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

1775 Aurora Ct
Aurora, CO 80045-2506
Phone: (303) 724-2323
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 13123 E 16th Ave, Aurora, CO 80045-7106 — (720) 777-1234

Specialties & licences

Pediatric Endocrinology Physician (primary) Taxonomy 2080P0205X · Licence DR.0052283 (CO)
Pediatric Endocrinology Physician Taxonomy 2080P0205X · Licence N2372 (TX)

Record details

NPI number1700012432
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 9, 2009
Last updated in NPPESOctober 21, 2026
Certification dateOctober 21, 2026

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.

Grant $500 1 payment · funding for a project or programme, not a fee for the clinician’s time

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.

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