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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 (12)

The overall average patient rating of Dr. Mark Horowitz is Good. Dr. Horowitz has been reviewed by 27 patients who have provided 12 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.5
Promptness 3.7
Courteous Staff 4.0
Accurate Diagnosis 3.6
Bedside Manner 3.4
Spends Time with Me 3.3
Follows Up After Visit 3.5

Specialties & Research

  • He has special expertise in 7 areas:
  • Fibromyalgia
  • Hip Osteoarthritis
  • Knee Osteoarthritis
  • Osteoporosis
  • Rheumatoid Arthritis
  • Sjogren's Syndrome
  • Systemic Lupus Erythematosus (SLE)

Education & Awards

Dr. Horowitz graduated from Northeastern Ohio Universities, Rootstown. He has 1 awards.

Castle Connolly Top Doctors: New York Metro Area™ (2002 - 2008, 2010 - 2015)


Dr. Horowitz has 4 hospital affiliations:

  • Mt Sinai Hospital 
  • University Hospital of Brooklyn at Long Island Hospital 


  • Spanish
  • Hebrew

> > > > Dr. Mark Horowitz, FACS, MD

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Additional Information
Dr. Mark David Horowitz FACS and MD is a male Rheumatologist, has 28 years of experience and practices in Rheumatology.
Where does Dr. Mark D. Horowitz practice?
Dr. Mark Horowitz has 2 office locations.
Dr. Mark Horowitz practices Rheumatology near New York, NY.
Additional practice locations include: Brooklyn, NY.
See New York Rheumatologists.