WILLIAM A RUTH MD
NPI 1972578318
Internal Medicine in Cambridge, MA

Active since February 21, 2006
77 MASS AVE, MEDICAL E23-395, CAMBRIDGE, MA 02139(617) 253-0556 Get Directions Write a Review

NPPES record last updated: April 5, 2012. Verified against the NPPES registry weekly; last sync: September 13, 2026.

About William A Ruth Md NPPES

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

WILLIAM A RUTH MD (NPI 1972578318) is an individual internal medicine provider in Cambridge, Massachusetts, licensed in Massachusetts (34755) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1972578318
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM A RUTHCredential: MD
Location Address77 MASS AVE, MEDICAL E23-395Cambridge, MA 02139-4301
Mailing AddressPo Box 425789, Medical E23-395Cambridge, MA 02142-0015 · (617) 253-0556
Sole ProprietorNo
Enumeration DateFebruary 21, 2006
Last NPPES UpdateApril 5, 2012
NPI 1972578318 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 · 34755
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.
77 MASS AVE, Cambridge, MA 02139

Other Identifiers 3

Medicare ID-Type UnspecifiedK19109MA
Medicare UPIND82943
OtherK19109MA · Blue Cross

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.

Psychiatry & Neurology (Psychiatry)
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139
Nurse Practitioner (Adult Health)
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139
Internal Medicine
77 MASS AVE, E23 193 MIT MEDICAL DEPARTMENT
CAMBRIDGE, MA 02139
Dietitian, Registered
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139
Psychiatry & Neurology (Psychiatry)
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139
Nurse Practitioner (Adult Health)
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139
Nurse Practitioner (Adult Health)
77 MASS AVE, E23-395 MEDICAL
CAMBRIDGE, MA 02139
Clinical Nurse Specialist (Psychiatric/Mental Health)
77 MASS AVE, MEDICAL E23-395
CAMBRIDGE, MA 02139

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 William Ruth's NPI number?

The NPI number for William Ruth is 1972578318. It was assigned to this individual provider in the NPPES registry on February 21, 2006.

Where is William Ruth located?

William Ruth practices at 77 Mass Ave Medical E23-395, Cambridge, MA 02139. The listed phone number is (617) 253-0556.

What is William Ruth'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 William Ruth was last updated on April 5, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years 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.