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Ruben Diaz, M.D.

Pediatric Endocrinology Physician in Boston, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1497793780

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Registry record

Entity type Individual (Type 1)
Name Ruben Diaz
Credential M.D.
Sex Male
Practice address 300 Longwood Avenue, Children'S Hosp. - Dept. of Endocrinolog, Boston, MA, 02215
Phone (617) 919-2930
Enumeration date Jun 2, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2080P0205X Pediatric Endocrinology Physician Allopathic & Osteopathic Physicians · License 81503 (MA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Ruben Diaz?
The National Provider Identifier (NPI) for Ruben Diaz is 1497793780, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ruben Diaz practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.