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

Day Onill Zayas Maldonado, MD

Individual provider Emergency Medicine Physician · NPI 1184003550

Day Onill Zayas Maldonado, MD practises Emergency Medicine in Tampa, Florida. Graduated from Florida State University College of Medicine in 2015, 11 years ago. Practices with Guidewell Emergency Medicine Doctors, LLC, a 90-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Florida and Maryland.

Years since qualifying
11
Trained at
Florida State University College of Medicine
Licensed in
FL, MD
In the registry since
2015
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

3100 E Fletcher Ave
Tampa, FL 33613-4613
Phone: (813) 971-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1500 Forest Glen Rd, Silver Spring, MD 20910-1460 — (301) 754-7000

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence ME131573 (FL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 21166 (FL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence D0087921 (MD)

Record details

NPI number1184003550
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 19, 2015
Last updated in NPPESDecember 8, 2022
Certification dateDecember 8, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolFLORIDA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Guidewell Emergency Medicine Doctors, Llc — 90 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients250
Services billed 1,491 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

Colleagues at Guidewell Emergency Medicine Doctors, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 90 clinicians in the practice; 12 are shown here.

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