Mark Horowitz, MD

Rheumatology

20+ years in practiceNPI: 1154490530Licensed in NY

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Credentials & Recognition

Specialties

Rheumatology

NPI sub-specialties

Internal Medicine207R00000X

Internal Medicine, Rheumatology207RR0500X

Practice Signals

Editorial signals beyond credentials. Patient transparency over opacity. See methodology.

Mid-Level (PA/NP) Use

Doctor-led visits

Years in Practice

20+ years

Estimated from NPI enumeration date

Featured in PBCMMG Rankings

#9

Top Rheumatologists in New York, 2026

Rheumatology · New York · 2026

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Frequently Asked Questions about Dr. Mark Horowitz, MD

Where does Dr. Mark Horowitz, MD practice?+
Dr. Mark Horowitz, MD practices in New York, NY. 21 EAST 90TH ST NEW YORK, NY 10128.
What is Dr. Mark Horowitz, MD's phone number?+
Dr. Mark Horowitz, MD's practice phone is 212-860-3077. Office contact information is verified on the PBCMMG profile.
What does Dr. Mark Horowitz, MD specialize in?+
Dr. Mark Horowitz, MD's primary specialty is Rheumatology.
Is Dr. Mark Horowitz, MD board certified?+
Board certification status for Dr. Mark Horowitz, MD has not been verified in the data sources PBCMMG uses (ABMS, state medical boards). The PBCMMG profile shows their current credential set.
How long has Dr. Mark Horowitz, MD been practicing?+
Dr. Mark Horowitz, MD has been in active practice for 20+ years, based on NPI enumeration and state licensing records.
What is Dr. Mark Horowitz, MD's NPI number?+
Dr. Mark Horowitz, MD's National Provider Identifier (NPI) is 1154490530, registered in the federal NPPES registry.

Profile maintained by Palm Beach County Medical Media Group, Inc. | Data verified from public registries (NPPES, ABMS, state medical boards). Methodology · Editorial Standards

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