Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. NICHOLAS ALEXANDER CHRISTAKIS MD PHD
NPI 1881684520
Internal Medicine in Boston, MA

Active since October 25, 2005
55 FRUIT ST, PALLTIATIVE CARE SERVICE, BOSTON, MA 02114(617) 724-9197 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Nicholas Alexander Christakis Md Phd NPPES

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

DR. NICHOLAS ALEXANDER CHRISTAKIS MD PHD (NPI 1881684520) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (212672) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1881684520
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. NICHOLAS ALEXANDER CHRISTAKISCredential: MD PHD
Location Address55 FRUIT ST, PALLTIATIVE CARE SERVICEBoston, MA 02114-2621
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Sole ProprietorNo
Enumeration DateOctober 25, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1881684520 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in MA · 212672
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

55 FRUIT ST, Boston, MA 02114

Other Identifiers 3

Medicaid0190870MA
OtherJ24585MA · Bcbs Ma
Other212672MA · Tufts Health Plan

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.

Pathology (Anatomic Pathology)
55 FRUIT ST
BOSTON, MA 02114
Internal Medicine (Hematology & Oncology)
55 FRUIT ST
BOSTON, MA 02114
Anesthesiology
55 FRUIT ST, GRAY-BIGELOW 444
BOSTON, MA 02114
Physical Medicine & Rehabilitation
55 FRUIT ST
BOSTON, MA 02114
Internal Medicine (Infectious Disease)
55 FRUIT ST, DIVISION OF INFECTIOUS DISEASE, GRJ-504
BOSTON, MA 02114
Nurse Practitioner (Acute Care)
55 FRUIT ST, BIGALOW 852 F
BOSTON, MA 02114
Nurse Practitioner
55 FRUIT ST
BOSTON, MA 02114
Internal Medicine (Cardiovascular Disease)
55 FRUIT ST
BOSTON, MA 02114

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 Nicholas Christakis's NPI number?

The NPI number for Nicholas Christakis is 1881684520. It was assigned to this individual provider in the NPPES registry on October 25, 2005.

Where is Nicholas Christakis located?

Nicholas Christakis practices at 55 Fruit St Palltiative Care Service, Boston, MA 02114. The listed phone number is (617) 724-9197.

What is Nicholas Christakis's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Nicholas Christakis was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.