Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mervin De Guzman Diaz, MD

Individual provider Emergency Medicine Physician · NPI 1548876121

Dr. Mervin De Guzman Diaz, MD is a General Practice in Humacao, Puerto Rico. Qualified in 2020, 6 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Puerto Rico.

Years since qualifying
6
Licensed in
PR
In the registry since
2020
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 may be wrong

The ZIP code does not match the city and state on this record. Call before visiting.

355 Calle Font Martelo
Humacao, PR 00791-3249
Phone: (787) 852-0768

No coordinates on file. Search this address in Google Maps

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence 24685 (PR)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 24685 (PR)

Record details

NPI number1548876121
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 19, 2020
Last updated in NPPESMay 24, 2026
Certification dateMay 24, 2026

Medicare enrollment

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

Medicare specialtyGENERAL PRACTICE
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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