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

ARNALDO J SANTOS
NPI 1578181772
Pediatrics in Boston, MA

Q: What is Arnaldo Santos's NPI number?

The NPI number for Arnaldo Santos is 1578181772. It was assigned to this individual provider in the NPPES registry on July 14, 2020.

Q: What is Arnaldo Santos's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Arnaldo Santos was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 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.

Active since July 14, 2020

55 FRUIT ST # 5, BOSTON, MA 02114(617) 643-3730 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 19, 2025, Jul 14, 2020 (2 updates tracked since 2020).

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About Arnaldo J Santos NPPES

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

ARNALDO J SANTOS (NPI 1578181772) is an individual pediatrics provider in Boston, Massachusetts, licensed in Massachusetts (1026450) and active in the NPI registry since July 2020.

NPPES Registry Identity

NPI1578181772

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameARNALDO J SANTOS

Location Address55 FRUIT ST # 5Boston, MA 02114-2621

Mailing Address55 Fruit St # 5Boston, MA 02114-2621 · (787) 840-2575

Phone(617) 643-3730

Sole ProprietorNo

Enumeration DateJuly 14, 2020

Last NPPES UpdateJune 30, 20262 updates tracked since enumeration

NPPES CertifiedJune 30, 2026

✔ NPI 1578181772 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

Licenses✔ Licensed in MA · 1026450✔ Licensed in PR · 24512

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Also ListedGeneral PracticeTaxonomy 208D00000X · License 24512 (PR)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

55 FRUIT ST # 5, Boston, MA 02114

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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 Arnaldo Santos's NPI number?

The NPI number for Arnaldo Santos is 1578181772. It was assigned to this individual provider in the NPPES registry on July 14, 2020.

Where is Arnaldo Santos located?

Arnaldo Santos practices at 55 Fruit St # 5, Boston, MA 02114. The listed phone number is (617) 643-3730.

What is Arnaldo Santos's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

When was this NPI record last updated?

The NPPES record for Arnaldo Santos was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 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.