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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

RUBEN DIAZ M.D.
NPI 1497793780
Pediatrics - Pediatric Endocrinology in Boston, MA

Active since June 02, 2006
300 LONGWOOD AVENUE, CHILDREN'S HOSP. - DEPT. OF ENDOCRINOLOG, BOSTON, MA 02215(617) 919-2930 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ruben Diaz M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RUBEN DIAZ M.D. (NPI 1497793780) is an individual pediatric endocrinology provider in Boston, Massachusetts, licensed in Massachusetts (81503) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1497793780
Entity TypeIndividualMale
Primary Taxonomy2080P0205X
Provider Legal NameRUBEN DIAZCredential: M.D.
Location Address300 LONGWOOD AVENUE, CHILDREN'S HOSP. - DEPT. OF ENDOCRINOLOGBoston, MA 02215
Mailing Address300 Longwood Avenue, Children's Hosp. - Dept. Of EndocrinologBoston, MA 02215 · (617) 919-2930
Phone(617) 919-2930
Sole ProprietorNo
Enumeration DateJune 2, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1497793780 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0205X
License✔ Licensed in MA · 81503
Definition
A pediatrician who provides expert care to infants, children and adolescents who have diseases that result from an abnormality in the endocrine glands (glands which secrete hormones). These diseases include diabetes mellitus, growth failure, unusual size for age, early or late pubertal development, birth defects, the genital region and disorders of the thyroid, the adrenal and pituitary glands.
300 LONGWOOD AVENUE, Boston, MA 02215
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Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. KATHRYN ISAAC M.D., FRCSC
Oral & Maxillofacial Surgery
300 LONGWOOD AVENUE, CHILDREN'S HOSPITAL
BOSTON, MA 02215
Suffolk County (617) 355-6000
AMANDA KATHERINE BOYER DPT
Physical Therapist (Pediatrics)
300 LONGWOOD AVENUE
BOSTON, MA 02215
Suffolk County (617) 355-7212
KATHARINE C GARVEY M.D.
Pediatrics (Pediatric Endocrinology)
300 LONGWOOD AVENUE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02215
Suffolk County (617) 355-6363
DR. KAREN FIONA WATTERS MD, MPH
Otolaryngology (Pediatric Otolaryngology)
300 LONGWOOD AVENUE, DEPARTMENT OF OTOLARYNGOLOGY, CHILDRENS HOSPITAL BOSTON
BOSTON, MA 02215
Suffolk County (617) 355-7793

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ruben Diaz's NPI number?

The NPI number for Ruben Diaz is 1497793780. It was assigned to this individual provider in the NPPES registry on June 2, 2006.

Where is Ruben Diaz located?

Ruben Diaz practices at 300 Longwood Avenue Children's Hosp. - Dept. Of Endocrinolog, Boston, MA 02215. The listed phone number is (617) 919-2930.

What is Ruben Diaz's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Endocrinology, with taxonomy code 2080P0205X.

When was this NPI record last updated?

The NPPES record for Ruben Diaz was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.