Patient Experience RatingPatient Experience Star Ratings and Comments
Industry Relationships
About Me
I was born in New York and grew up in Boston. Some patients who are sports fans find that to be a non-starter. I moved back to New York for medical school, though, and now consider myself to be a New Yorker through and through. I became interested in neuroscience during college at Harvard, inspired by the beauty and complexity of the nervous system and the experiences of patients with neurologic disease. Then in medical school at Columbia, I gravitated toward neurosurgery because of the rigorous training required to master its operations, my inspiring surgical mentors in the field, and the ability to make a real difference in patients’ lives inside and outside of the operating room.
In the Cerebrovascular Center in the Department of Neurosurgery at Mount Sinai, I have had the privilege of collaborating with an exceptional, internationally-renowned group of clinicians and researchers who are devoted to improving the lives of our patients. Our most important mission is to ensure that each person we see receives compassionate, individualized, and expert care. This has given me the opportunity to offer the best available treatments to my patients including cutting-edge treatment with new devices and techniques or participation in select clinical trials when appropriate.
My clinical practice focuses on patients who are found to have aneurysms, vascular malformations (including AVMs, cavernous malformations, and dural AV fistulas), moyamoya disease, carotid stenosis, chronic subdural hematomas, pseudotumor cerebrii (also called idiopathic intracranial hypertension), and pulsatile tinnitus. Most of the time, these problems do not require surgery and can be followed by repeating imaging studies like MRI, CT, or ultrasound. I always review the data-driven risks and benefits of observation versus surgery with every patient and their loved ones.
As the Director of the Intracerebral Hemorrhage Program at Mount Sinai, I have had the privilege of working with experts who devote their careers to patients with hemorrhagic stroke throughout the continuum of care, from the emergency room when the bleeding first occurs, to the operating room if needed, to the neurorehabilitation unit and beyond. Together, my colleagues and I have developed a novel minimally invasive treatment for removing brain hemorrhages called the SCUBA technique which many centers around the world are now using. We have also initiated an Enhanced Stroke Recovery Program in collaboration with the Department for Rehabilitation and Human Performance to offer Vagus Nerve Stimulation for patients recovering from stroke. Finally, we have developed a post-stroke monitoring program called the Precision Recovery Program, which uses a digital health mobile application and care platform that we developed at Mount Sinai to keep our patients connected to the care team, help them prevent a second stroke, and maximize their recovery.
Most importantly, I care deeply about developing a relationship with every patient based on trust and an agreement that I will do everything possible to help my patients live their lives to the fullest whether they are contemplating surgery for a newly discovered problem or recovering from a sudden, unexpected stroke.
I was born in New York and grew up in Boston. Some patients who are sports fans find that to be a non-starter. I moved back to New York for medical school, though, and now consider myself to be a New Yorker through and through. I became interested in neuroscience during college at Harvard, inspired by the beauty and complexity of the nervous system and the experiences of patients with neurologic disease. Then in medical school at Columbia, I gravitated toward neurosurgery because of the rigorous training required to master its operations, my inspiring surgical mentors in the field, and the ability to make a real difference in patients’ lives inside and outside of the operating room.
In the Cerebrovascular Center in the Department of Neurosurgery at Mount Sinai, I have had the privilege of collaborating with an exceptional, internationally-renowned group of clinicians and researchers who are devoted to improving the lives of our patients. Our most important mission is to ensure that each person we see receives compassionate, individualized, and expert care. This has given me the opportunity to offer the best available treatments to my patients including cutting-edge treatment with new devices and techniques or participation in select clinical trials when appropriate.
My clinical practice focuses on patients who are found to have aneurysms, vascular malformations (including AVMs, cavernous malformations, and dural AV fistulas), moyamoya disease, carotid stenosis, chronic subdural hematomas, pseudotumor cerebrii (also called idiopathic intracranial hypertension), and pulsatile tinnitus. Most of the time, these problems do not require surgery and can be followed by repeating imaging studies like MRI, CT, or ultrasound. I always review the data-driven risks and benefits of observation versus surgery with every patient and their loved ones.
As the Director of the Intracerebral Hemorrhage Program at Mount Sinai, I have had the privilege of working with experts who devote their careers to patients with hemorrhagic stroke throughout the continuum of care, from the emergency room when the bleeding first occurs, to the operating room if needed, to the neurorehabilitation unit and beyond. Together, my colleagues and I have developed a novel minimally invasive treatment for removing brain hemorrhages called the SCUBA technique which many centers around the world are now using. We have also initiated an Enhanced Stroke Recovery Program in collaboration with the Department for Rehabilitation and Human Performance to offer Vagus Nerve Stimulation for patients recovering from stroke. Finally, we have developed a post-stroke monitoring program called the Precision Recovery Program, which uses a digital health mobile application and care platform that we developed at Mount Sinai to keep our patients connected to the care team, help them prevent a second stroke, and maximize their recovery.
Most importantly, I care deeply about developing a relationship with every patient based on trust and an agreement that I will do everything possible to help my patients live their lives to the fullest whether they are contemplating surgery for a newly discovered problem or recovering from a sudden, unexpected stroke.
Accepted insurance may vary by the doctor’s office location. Please contact the office directly to obtain the most up-to-date insurance information.
Patients with Cigna Medicare Advantage or Humana Medicare Advantage insurance: Please read this important message before booking to find out if out-of-network costs may apply to your next visit.
Klingenstein Clinical Center1450 Madison Avenue, 1-North, New York, NY, 10029
1199 SEIU
AETNA - Commercial
AETNA - Medicare
Affinity Medicaid-Medicare-Essential Exchange
Amidacare Medicaid
CIGNA Healthcare
Centivo
Elderplan
EmblemHealth - GHI-PPO
EmblemHealth - HIP
EmblemHealth - HIP-Medicaid
EmblemHealth - HIP-Medicare
Empire Blue Cross Blue Shield - Commercial/Exchange
Empire Blue Cross Blue Shield - HealthPlus Medicaid
Empire Blue Cross Blue Shield - Medicare
Fidelis Health Care
HealthFirst Medicaid
HealthFirst Medicare
Horizon NJ
Humana Medicare
Magnacare-Health Care
Medicare - NJ
Medicare - NY
Metroplus
Multiplan PHCS
NJ Medicaid
NY Medicaid
Oscar
Oxford - Freedom and Liberty
Partners Health Plan
Senior Whole Health
United Health Care - Commercial
United Health Care - Empire Plan
United Health Care - Oxford Care
United Health Care - Top Tier
VNSNY Choice Medicare
VNSNY Select Health Medicaid
VillageCareMax
WellCare Health Plan
Mount Sinai West1000 10th ave, 10th Floor, New York, NY, 10019
1199 SEIU
AETNA - Commercial
AETNA - Medicare
Affinity Medicaid-Medicare-Essential Exchange
Amidacare Medicaid
CIGNA Healthcare
Centivo
Elderplan
EmblemHealth - GHI-PPO
EmblemHealth - HIP
EmblemHealth - HIP-Medicaid
EmblemHealth - HIP-Medicare
Empire Blue Cross Blue Shield - Commercial/Exchange
Empire Blue Cross Blue Shield - HealthPlus Medicaid
Empire Blue Cross Blue Shield - Medicare
Fidelis Health Care
HealthFirst Medicaid
HealthFirst Medicare
Horizon NJ
Humana Medicare
Magnacare-Health Care
Medicare - NJ
Medicare - NY
Metroplus
Multiplan PHCS
NJ Medicaid
NY Medicaid
Oscar
Oxford - Freedom and Liberty
Partners Health Plan
Senior Whole Health
United Health Care - Commercial
United Health Care - Empire Plan
United Health Care - Oxford Care
United Health Care - Top Tier
VNSNY Choice Medicare
VNSNY Select Health Medicaid
VillageCareMax
WellCare Health Plan
Klingenstein Clinical Center1450 Madison Avenue, 1-North, New York, NY, 10029
1199 SEIU
AETNA - Commercial
AETNA - Medicare
Affinity Medicaid-Medicare-Essential Exchange
Amidacare Medicaid
CIGNA Healthcare
Centivo
Elderplan
EmblemHealth - GHI-PPO
EmblemHealth - HIP
EmblemHealth - HIP-Medicaid
EmblemHealth - HIP-Medicare
Empire Blue Cross Blue Shield - Commercial/Exchange
Empire Blue Cross Blue Shield - HealthPlus Medicaid
Empire Blue Cross Blue Shield - Medicare
Fidelis Health Care
HealthFirst Medicaid
HealthFirst Medicare
Horizon NJ
Humana Medicare
Magnacare-Health Care
Medicare - NJ
Medicare - NY
Metroplus
Multiplan PHCS
NJ Medicaid
NY Medicaid
Oscar
Oxford - Freedom and Liberty
Partners Health Plan
Senior Whole Health
United Health Care - Commercial
United Health Care - Empire Plan
United Health Care - Oxford Care
United Health Care - Top Tier
VNSNY Choice Medicare
VNSNY Select Health Medicaid
VillageCareMax
WellCare Health Plan
Mount Sinai West1000 10th ave, 10th Floor, New York, NY, 10019
1199 SEIU
AETNA - Commercial
AETNA - Medicare
Affinity Medicaid-Medicare-Essential Exchange
Amidacare Medicaid
CIGNA Healthcare
Centivo
Elderplan
EmblemHealth - GHI-PPO
EmblemHealth - HIP
EmblemHealth - HIP-Medicaid
EmblemHealth - HIP-Medicare
Empire Blue Cross Blue Shield - Commercial/Exchange
Empire Blue Cross Blue Shield - HealthPlus Medicaid
Empire Blue Cross Blue Shield - Medicare
Fidelis Health Care
HealthFirst Medicaid
HealthFirst Medicare
Horizon NJ
Humana Medicare
Magnacare-Health Care
Medicare - NJ
Medicare - NY
Metroplus
Multiplan PHCS
NJ Medicaid
NY Medicaid
Oscar
Oxford - Freedom and Liberty
Partners Health Plan
Senior Whole Health
United Health Care - Commercial
United Health Care - Empire Plan
United Health Care - Oxford Care
United Health Care - Top Tier
VNSNY Choice Medicare
VNSNY Select Health Medicaid
VillageCareMax
WellCare Health Plan
1199 SEIU
AETNA - Commercial
AETNA - Medicare
Affinity Medicaid-Medicare-Essential Exchange
Amidacare Medicaid
CIGNA Healthcare
Centivo
Elderplan
EmblemHealth - GHI-PPO
EmblemHealth - HIP
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Physicians who provide services at hospitals and facilities in the Mount Sinai Health System might not participate in the same health plans as those Mount Sinai hospitals and facilities (even if the physicians are employed or contracted by those hospitals or facilities).
Information regarding insurance participation and billing by this physician may be found on this page, and can also be obtained by contacting this provider directly. Because physicians insurance participation can change, the insurance information on this page may not always be up-to-date. Please contact this physician directly to obtain the most up-to-date insurance information.
Insurance and health plan networks that the various Mount Sinai Health System hospitals and facilities participate in can be found on the Mount Sinai Health System website.
The Patient Experience Star Rating reflects our patients’ perception of how well their Mount Sinai provider communicated with them during an office visit. The Star Rating is based on patient responses to three questions on a patient experience survey, a standardized questionnaire sent to verified patients and distributed by a third party vendor, Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score.
Care Provider’s Explanation
4.9 out of 5
Care Provider’s Concern
5 out of 5
Likelihood to Recommend Care Provider
5 out of 5
Industry Relationships
Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.
Below are financial relationships with industry reported by Dr. Kellner during 2024 and/or 2025. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.
Equity (Stock or stock options valued at greater than 5% ownership of a publicly traded company or equity of any value in a privately held company)
Reach Neuro
Aurenar
Phantom Neuro
Radical
Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.
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Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.
Below are financial relationships with industry reported by Dr. Kellner during 2024 and/or 2025. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.
Equity (Stock or stock options valued at greater than 5% ownership of a publicly traded company or equity of any value in a privately held company)
Reach Neuro
Aurenar
Phantom Neuro
Radical
Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.