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Hornyak, Mark John, MD





Providing the best care to our patients and their companions requires communicating in a way everyone understands. Interpreter services are available 24 hours a day, 7 days a week, 365 days a year. All spoken languages are available, as well as American Sign Language (AS/L).

Accepting New Patients
  • Neurosurgery
  • Spine Surgery

Areas of Expertise
Anterior Cervical Discectomy, Anterior Cervical Fusion, Back Surgery, Brain Surgery, Brain Tumors, Cervical Disc Arthroplasty, Degenerative Spinal Disorders, Gliomas, Hydrocephalus, Kyphoplasty, Lumbar Spine Decompression, Lumboperitoneal Shunt, Meningiomas, Metastatic Tumors, Microvascular Decompression, Minimally Invasive Spine Surgery, Peripheral Nerve Disorders, Pituitary Tumors, Schwannomas, Spinal Fusions, Sterotactic Radiosurgery, Thoracic Spine Decompression, Trigeminal Neuralgia


University of Utah

New York Medical College

Medical School
University of Maryland School of Medicine

New York Medical College

Professional Organizations

  • American Association of Neurological Surgeons
  • Congress of Neurological Surgeons
  • North American Skull Base Society
  • Pituitary Network
  • TNA The Facial Pain Association


Verified Patient Reviews

1 out of 5 stars

Dr. Hornyak was the worst doctor I have ever experienced in my lifetime. He spent 3 minutes in with me telling me that this isn't his problem and that if I have a headache again, to see my primary care doctor. I was referred by my primary care doctor so why did I waste my time here? He didn't seem to care and it felt as if he saw my appointment with him as an inconvenience and a waste of his time. The MEDICAL ASSISTANT was better than him. This man should not be seeing patients.

5 out of 5 stars

Care provider acted as if reference to him was a waste of his time.

5 out of 5 stars

Caring, honest, asked us questions, very easy to talk to, answered all our questions. Very impressed.

5 out of 5 stars

Could not have asked for any better care.

Other Reviews from Around the Web

1 out of 5 stars

The office staff was about the only thing that saved this review. They were very kind and helpful. Not a fan of Dr. Hornyak. Came in for 3 minutes, asked why I was there, explained that I had a referral about chiari malformation 1. He said it was common when people have been in car accidents or have mris. He said if I get a headache again, go to my primary care doctor. What kind of doctor is this? Seemed like I was a waste of his time which left a bad taste in my mouth. I would not recommend him at all.

5 out of 5 stars

Dr. Hornyak took time to explain to me the results of the MRI and explained other diagnostic tests that might provide a definitive answer.

5 out of 5 stars

Dr.Hornyak was very informative and made us feel very comfortable with the whole procedure. He took good care of my mom and her back is relieved since surgery . She had a lumbar fusion.



Aetna, Anthem, BCBS Medicare, CarePartners of Connecticut, Cigna Healthcare, Colonial Cooperative Care, Community Health Network of Connecticut, Inc., Connecticare, Connecticare Commercial, Connecticare Medicare, Corvel, Coventry, Essence Healthcare, Evercare, First Health Group Corp., Focus, Health Connecticut, Health Direct, Health New England, Healthy Connecticut, Multiplan, Northeast Health Direct, One Health Plan/ Great-West Healthcare, Oxford Health Plans, Prime Health Services, Private Health Care Systems, Inc., Senior Whole Health, United Healthcare, WellCare of Connecticut, Inc.

This information is subject to change at any time. Please check with your insurance provider before scheduling your appointment or receiving services to confirm they are a participating member of the Hartford HealthCare network.