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

Justiniano Castro - Montalvo, MD

Individual provider Hematology & Oncology Physician · NPI 1811041114

Justiniano Castro - Montalvo, MD is a Hematology/Oncology in Arecibo, Puerto Rico. Graduated from University of Puerto Rico School of Medicine in 1987, 39 years ago. Practices with Instituto Del Cancer Y Enfermedades De La Sangre, Csp, a 3-clinician group and accepts Medicare assignment. Licensed in Puerto Rico.

Years since qualifying
39
Trained at
University of Puerto Rico School of Medicine
Licensed in
PR
In the registry since
2007
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.

Urb Garcia Calle Andres Garcia No 53
Arecibo, PR 00612
Phone: (787) 817-4973
Fax: (787) 817-4997

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 10600 (PR)

Record details

NPI number1811041114
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 23, 2007
Last updated in NPPESFebruary 17, 2012

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF PUERTO RICO SCHOOL OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Instituto Del Cancer Y Enfermedades De La Sangre, Csp — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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