Overview
Leonard Horwitz is a Hematologist practicing medicine in Cleveland, Ohio.
His clinical expertise encompasses Adult T-Cell Leukemia.
He is actively involved in clinical research, co-authoring 3 peer reviewed articles and participating in 4 clinical trials.
Specialties
Licenses
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
Locations
9500 Euclid Ave # R35, Cleveland, OH 44195
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
4 Clinical Trials
Cleveland Clinic Main Campus
Jaroslaw Maciejewski is a Hematologist practicing medicine in Cleveland, Ohio. Dr. Maciejewski is highly rated in 25 conditions, according to our data. His clinical expertise encompasses Paroxysmal Nocturnal Hemoglobinuria (PNH), Aplastic Anemia, Paroxysmal Cold Hemoglobinuria, Bone Marrow Transplant, and Splenectomy. Dr. Maciejewski is board certified in American Board Of Internal Medicine, 2001. Dr. Maciejewski is currently accepting new patients.
Cleveland Clinic
Eric Hsi is a Hematologist practicing medicine in Cleveland, Ohio. Dr. Hsi is highly rated in 24 conditions, according to our data. His clinical expertise encompasses Non-Hodgkin Lymphoma, B-Cell Lymphoma, Diffuse Large B-Cell Lymphoma (DLBCL), Bone Marrow Transplant, and Splenectomy. Dr. Hsi is currently accepting new patients.
Cleveland Clinic Main Campus
Matt Kalaycio is a Hematologist practicing medicine in Cleveland, Ohio. Dr. Kalaycio is highly rated in 38 conditions, according to our data. His clinical expertise encompasses Myelodysplastic Syndrome (MDS), Leukemia, Graft Versus Host Disease (GvHD), Bone Marrow Transplant, and Bone Marrow Aspiration. Dr. Kalaycio is board certified in American Board Of Internal Medicine, 1994. Dr. Kalaycio is currently accepting new patients.
Frequently Asked Questions about Dr. Leonard J. Horwitz
How do I make an appointment with Dr. Leonard J. Horwitz?
You can book an appointment with Dr. Leonard J. Horwitz by calling their office at 216-445-2030. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. Leonard J. Horwitz a top-rated expert for Adult T-Cell Leukemia?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. Leonard J. Horwitz is classified as an Experienced expert for Adult T-Cell Leukemia, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. Leonard J. Horwitz specialize in?
While Dr. Leonard J. Horwitz is a Hematology, they have specific expertise in Adult T-Cell Leukemia. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Hematology.
Does Dr. Leonard J. Horwitz participate in research or clinical trials?
Yes. Dr. Leonard J. Horwitz has published 3 articles and abstracts on conditions like Adult T-Cell Leukemia. You can view a list of Dr. Leonard J. Horwitz's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.
Does Dr. Leonard J. Horwitz accept my insurance?
Dr. Leonard J. Horwitz accepts most major insurance plans, including Anthem BCBS. We recommend calling the office directly at 216-445-2030 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers

