1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Emergency Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. IRENE TIEN MD
NPI 1649220955
Emergency Medicine in Boston, MA

Active since May 10, 2006
91 E CONCORD ST, RM 6215, BOSTON, MA 02118(617) 414-4397(617) 414-4393 Get Directions Write a Review

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

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. Irene Tien Md NPPES

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

DR. IRENE TIEN MD (NPI 1649220955) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (159223) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1649220955
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. IRENE TIENCredential: MD
Location Address91 E CONCORD ST, RM 6215Boston, MA 02118-2644
Mailing Address2 Clarendon St, Apt 702Boston, MA 02116-6137 · (617) 267-1217 · Fax (617) 267-1217
Phone(617) 414-4397
Fax(617) 414-4393
Sole ProprietorNo
Enumeration DateMay 10, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1649220955 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in MA · 159223
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.
Also ListedEmergency Medicine · Pediatric Emergency MedicineTaxonomy 207PP0204X · License 159223 (MA)
91 E CONCORD ST, Boston, MA 02118
Open in Google Maps ↗

Other Identifiers 1

Medicaid3193233MA

Other Providers at the Same Location NPPES 2

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

CELINE RICHARD CNM
Obstetrics & Gynecology
91 E CONCORD ST, MAT 4
BOSTON, MA 02118
Suffolk County (617) 414-5469
STELLA CHAN-FLYNN CNM
Obstetrics & Gynecology
91 E CONCORD ST, MAT 4
BOSTON, MA 02118
Suffolk County (617) 414-5469

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 Irene Tien's NPI number?

The NPI number for Irene Tien is 1649220955. It was assigned to this individual provider in the NPPES registry on May 10, 2006.

Where is Irene Tien located?

Irene Tien practices at 91 E Concord St Rm 6215, Boston, MA 02118. The listed phone number is (617) 414-4397.

What is Irene Tien'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 Irene Tien 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 22 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.