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

ELLEN CASLIN MD
NPI 1164128435
Emergency Medicine in Boston, MA

Active since February 07, 2023
1 DEACONESS RD, BOSTON, MA 02215(617) 754-2400 Get Directions Write a Review

NPPES record last updated: September 15, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 15, 2026, Feb 7, 2023 (2 updates tracked since 2023).

About Ellen Caslin Md NPPES

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

ELLEN CASLIN MD (NPI 1164128435) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (3019093) and active in the NPI registry since February 2023.

NPPES Registry Identity

NPI1164128435
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameELLEN CASLINCredential: MD
Location Address1 DEACONESS RDBoston, MA 02215-5321
Mailing Address1 Deaconess RdBoston, MA 02215-5321
Sole ProprietorNo
Enumeration DateFebruary 7, 2023
Last NPPES UpdateSeptember 15, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2026
NPI 1164128435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License Licensed in MA · 3019093
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1 DEACONESS RD, Boston, MA 02215

Other Providers at the Same Location NPPES 20

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

Emergency Medicine
1 DEACONESS RD, WEST CC2
BOSTON, MA 02215
Emergency Medicine
1 DEACONESS RD, WEST CLINICAL CENTER 2
BOSTON, MA 02215
Student in an Organized Health Care Education/Training Program
1 DEACONESS RD, W-CC2 DEPARTMENT OF EMERGENCY MEDICINE
BOSTON, MA 02215
Emergency Medicine
1 DEACONESS RD, DEPT OF EMERGENCY MEDICINE, WEST-CC2
BOSTON, MA 02215
Social Worker (Clinical)
1 DEACONESS RD
BOSTON, MA 02215
Emergency Medicine
1 DEACONESS RD
BOSTON, MA 02215
Emergency Medicine
1 DEACONESS RD, W-CC2
BOSTON, MA 02215
Emergency Medicine
1 DEACONESS RD
BOSTON, MA 02215

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 Ellen Caslin's NPI number?

The NPI number for Ellen Caslin is 1164128435. It was assigned to this individual provider in the NPPES registry on February 7, 2023.

Where is Ellen Caslin located?

Ellen Caslin practices at 1 Deaconess Rd, Boston, MA 02215. The listed phone number is (617) 754-2400.

What is Ellen Caslin's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

When was this NPI record last updated?

The NPPES record for Ellen Caslin was last updated on September 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.