Dr. Diane Michelle Horowitz, MD

Dr. Horowitz practices at Northwell Health Physician Partners Cardiology in Great Neck, New York.

Dr. Horowitz's NPI, 1275774101, was assigned on March 24, 2009. Dr. Horowitz graduated from Stony Brook University Health Sciences Center School of Medicine in 2004. Dr. Horowitz holds New York license 246416.

Dr. Horowitz's primary practice is Northwell Health Physician Partners Cardiology, at 865 Northern Blvd, Great Neck, NY 11021 in Nassau County. The practice phone is (516) 321-7400.

Dr. Horowitz's primary practice is Northwell Health Physician Partners Cardiology in Great Neck, New York. Dr. Horowitz is also affiliated with North Shore University Hospital. The medical group on file is Northwell Health Physician Partners Cardiology at Great Neck. Dmand AI also links Dr. Horowitz to 2 more hospitals and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz practices, 4 sites in all. Vendor and product names are available with a free account.

Rheumatology is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Horowitz is licensed in New York.

CMS data shows 8,205 Medicare services from Dr. Horowitz across 16 procedure codes in 2024, for 242 Medicare patients. Medicare paid $330,776 for them.

CMS counts 242 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 65 to 74, with 102 patients. 75% of them have arthritis, and 75% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.88, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 65, with 67% women.

In 2024, Dr. Horowitz wrote 1,779 Medicare Part D claims for 287 patients. 85% of them were for generic drugs. CMS names the drug for 1,551 of them, across 33 drugs with 11 or more claims each, at $1,255,530 in total drug cost. In 2023, CMS named 1,276 claims across 33 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Horowitz for performance year 2024, reported through an alternative payment model (APM). Dr. Horowitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Horowitz as offering telehealth.

CMS Open Payments shows 138 general payments to Dr. Horowitz from 9 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 38% of the total. Novartis Pharmaceuticals Corporation paid the most, $7,208.

Dr. Horowitz graduated from Stony Brook University Health Sciences Center School of Medicine in 2004.