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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. Jack Brenner is Excellent. Dr. Brenner has been reviewed by 16 patients who have provided 5 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 3.2
Courteous Staff 4.6
Accurate Diagnosis 4.5
Bedside Manner 4.5
Spends Time with Me 4.5
Follows Up After Visit 4.4

Specialties & Research

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Brenner graduated from Universita Degli Studi Di Roma La Sapienza (Facolta I), Rome. He has 1 awards.

Compassionate Doctor Recognition (2012, 2014)


Dr. Brenner has 1 hospital affiliations:

  • Northern Westchester Hospital 


  • Spanish
  • Polish
  • Italian

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Additional Information
Dr. Jack Leon Brenner MD is a male Internist, has 44 years of experience and practices in Gastroenterology.
Where does Dr. Jack L. Brenner practice?
Dr. Jack Brenner has 2 office locations.
Dr. Jack Brenner practices Gastroenterology near Yorktown Heights, NY.
See Yorktown Heights Gastroenterologists.