Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Guillermo J Pastrana Maisonet, MD

Individual provider General Practice Physician · NPI 1124307814

Dr. Guillermo J Pastrana Maisonet, MD is a General Practice in San Juan, Puerto Rico. Qualified in 2008, 18 years ago. Practices with Pastrana Toledo Medical Group, LLC, a 2-clinician group and accepts Medicare assignment. Licensed in Puerto Rico.

Years since qualifying
18
Licensed in
PR
In the registry since
2011
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.

505 Ave Hostos
San Juan, PR 00918-3201
Phone: (787) 902-6631
Fax: (787) 339-2700

No coordinates on file. Search this address in Google Maps

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence 18300 (PR)

Record details

NPI number1124307814
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 11, 2011
Last updated in NPPESJanuary 25, 2024
Certification dateJanuary 25, 2024

Medicare enrollment

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

Medicare specialtyGENERAL PRACTICE
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Pastrana Toledo Medical Group, Llc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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