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

DR. JULES LEONARD DIENSTAG MD
NPI 1710959390
Internal Medicine in Boston, MA

Active since February 07, 2006PECOS Enrolled
55 FRUIT ST, BLK 4, GASTROENTEROLOGY ASSOCIATES, BOSTON, MA 02114(617) 726-7450(617) 726-3673 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. Jules Leonard Dienstag Md NPPES

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

DR. JULES LEONARD DIENSTAG MD (NPI 1710959390) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (42401) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1710959390
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. JULES LEONARD DIENSTAGCredential: MD
Location Address55 FRUIT ST, BLK 4, GASTROENTEROLOGY ASSOCIATESBoston, MA 02114-2696
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Fax(617) 726-3673
Sole ProprietorNo
Enumeration DateFebruary 7, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1710959390 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 · 42401
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

OtherM09697MA · Bcbs Ma
Medicaid2062798MA
Other042401MA · Tufts Health Plan

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Dr. Jules Leonard Dienstag Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Jules Dienstag's NPI number?

The NPI number for Jules Dienstag is 1710959390. It was assigned to this individual provider in the NPPES registry on February 7, 2006.

Where is Jules Dienstag located?

Jules Dienstag practices at 55 Fruit St Blk 4, Gastroenterology Associates, Boston, MA 02114. The listed phone number is (617) 726-7450.

What is Jules Dienstag's specialty?

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

Is Jules Dienstag enrolled in Medicare?

Yes. Jules Dienstag is registered in the Medicare PECOS enrollment system.

What insurance does Jules Dienstag accept?

Health plans from Anthem Blue Cross and Blue Shield list Jules Dienstag as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

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