Summary

Dr. Leonard Horowitz specializes in family medicine, bringing nearly four decades of experience to comprehensive patient care. He earned his medical degree from Georgetown University School of Medicine and completed his residency at Stony Brook University Medical Center. With 39 years of dedicated practice, Dr. Horowitz has developed extensive expertise in treating patients across all age groups. He provides care in English to ensure clear communication with his patients.

Dr. Horowitz maintains affiliations with Beverly Hospital, Anna Jaques Hospital, Lahey Medical Center Peabody, and Addison Gilbert Hospital, serving communities throughout Danvers, Peabody, Newburyport, Gloucester, and Beverly, Massachusetts. His clinical focus includes managing obesity and overweight conditions as well as addressing complex PTSD and ICU-related PTSD. He performs important preventive screenings including autism spectrum disorder assessments, developmental evaluations, and breast cancer screenings. Patients consistently rate Dr. Horowitz highly, giving him an average rating of 4.4 out of 5 stars.
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Overview based on verified provider data

Quick Facts

  • 4.4
  • 39 years of experience
  • speaks English
  • Stony Brook University Medical Center
  • 8 written reviews
  • 1 specialty
  • 9 areas of expertise
  • 4 hospital affiliations
  • 5 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Leonard Marc Horowitz has 5 locations

Leonard M Horowitz Medical Group

7 Federal St Ste 11Danvers, MA 01923
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Lahey Medical Center Peabody

1 Essex Center DrPeabody, MA 01960

Anna Jaques Hospital

25 Highland AveNewburyport, MA 01950

Addison Gilbert Hospital

298 Washington StGloucester, MA 01930

Beverly Hospital

85 Herrick StBeverly, MA 01915

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Dr. Leonard Marc Horowitz, MD
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Dr. Leonard Marc Horowitz, MDKaley O'Neill, NPDorah Zalwango, NPDr. Helen B Hardy
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.4 
39 Years of Experience 2 Years of Experience 3 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available No Virtual Visit Option
Speaks English Speaks English Speaks English, Swahili Speaks English
Danvers , MAChelmsford , MADracut , MAWestborough , MA
Med School: Georgetown University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Leonard Marc Horowitz

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Leonard Marc Horowitz has the following specialty

Specialty Expertise

Dr. Leonard Marc Horowitz has the following 9 areas of expertise

  • Adolescent Medicine
  • Check-up
  • Contraception
  • Family Planning
  • Holistic Health
  • Homeopathy
  • Immunization
  • Influenza
  • Weight Loss

Certifications, License, & Education

39 Years Experience

Dr. Leonard Marc Horowitz holds an expired medical license in the state of Massachusetts.

Medical License

Medical Doctor with an expired medical license in the state of Massachusetts that expired in 2026.

Education & Training

Residency

Completed their residency at Stony Brook University Medical Center.

Medical School

Graduated from Georgetown University School Of Medicine in 1987.

NPI Number

Dr. Horowitz's NPI number is 1649265844.

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Frequently Asked Questions

Does Dr. Leonard Horowitz accept virtual/telehealth appointments?
Dr. Leonard Horowitz has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Leonard Horowitz's office located?
Dr. Leonard Horowitz's office is located at 7 Federal St Ste 11, Danvers, MA, 01923.
Is Dr. Leonard Horowitz accepting new patients?
Dr. Leonard Horowitz has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Leonard Horowitz?
You can find contact information for Dr. Leonard Horowitz here on Vitals.
Which hospitals is Dr. Leonard Horowitz affiliated with?
Dr. Leonard Horowitz is affiliated with Beverly Hospital, Anna Jaques Hospital, Lahey Medical Center Peabody, and Addison Gilbert Hospital.

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