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

DR. ROBERT CHARLES LEINBACH MD
NPI 1699765875
Internal Medicine in Boston, MA

Active since October 27, 2005
55 FRUIT ST, CARDIAC CATHETERIZATION LAB MGH BLK 9, BOSTON, MA 02114(617) 726-7400(617) 726-7437 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. Robert Charles Leinbach Md NPPES

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

DR. ROBERT CHARLES LEINBACH MD (NPI 1699765875) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (29868) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1699765875
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ROBERT CHARLES LEINBACHCredential: MD
Location Address55 FRUIT ST, CARDIAC CATHETERIZATION LAB MGH BLK 9Boston, MA 02114-2696
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Phone(617) 726-7400
Fax(617) 726-7437
Sole ProprietorNo
Enumeration DateOctober 27, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1699765875 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 29868
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.
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License 29868 (MA)
55 FRUIT ST, Boston, MA 02114
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Other Identifiers 3

Other706110MA · Tufts Health Plan
Medicaid2087456MA
OtherM07355MA · Bcbs Ma

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.

STUTI GIRISH SHROFF MD, MBBS
Pathology (Anatomic Pathology)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 726-2971
NANCY WANG M.D.
Internal Medicine (Hematology & Oncology)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (017) 724-4000
DR. DUSAN HANIDZIAR M.D., PH.D.
Anesthesiology
55 FRUIT ST, GRAY-BIGELOW 444
BOSTON, MA 02114
Suffolk County (617) 726-3030
JOHN JOSEPH DANKO DO
Physical Medicine & Rehabilitation
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 726-2000
DR. MICHAEL ANDREW LOBRITZ M.D, PH.D.
Internal Medicine (Infectious Disease)
55 FRUIT ST, DIVISION OF INFECTIOUS DISEASE, GRJ-504
BOSTON, MA 02114
Suffolk County (617) 724-9248
MS. KELLY ELISHA TRECARTIN NP
Nurse Practitioner (Acute Care)
55 FRUIT ST, BIGALOW 852 F
BOSTON, MA 02114
Suffolk County (617) 726-7400
JAMIE MARIE ALLEN NP
Nurse Practitioner
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 724-4410
DR. DHAVAL SANJEEV KOLTE M.B.B.S., PH.D.
Internal Medicine (Cardiovascular Disease)
55 FRUIT ST
BOSTON, MA 02114
Suffolk County (617) 643-3238

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 Robert Leinbach's NPI number?

The NPI number for Robert Leinbach is 1699765875. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Where is Robert Leinbach located?

Robert Leinbach practices at 55 Fruit St Cardiac Catheterization Lab Mgh Blk 9, Boston, MA 02114. The listed phone number is (617) 726-7400.

What is Robert Leinbach'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 Robert Leinbach 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 26 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.