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Our Physicians

Our physicians strive to provide the highest quality of patient care. While monitoring remotely, they communicate in real time with the technologist and other staff in the OR to assist the surgeon and avoid damage to the patient's nervous system.

Part of our commitment to quality as a Telemedicine Physician Practice under the Joint Commission of Healthcare Organizations includes following these principles.
RTNA Physicians
Are on our staff and follow our credentialing policy and procedures
Participate in regular IONM focused CME
Practices are limited to your IONM patients
Quality and responsiveness is constantly evaluated

Read More About Our Physicians

Brian Ahuja, M.D.

Dr. Brian Ahuja entered the field of intraoperative neuromonitoring (IONM) to follow his passion for neurology and clinical neurophysiology, specifically the ability to use neurophysiologic testing in the operating room to help prevent postoperative neurologic deficits. Prior to his current role, Dr. Ahuja spent the majority of his career studying and training in neurology, gaining experiences in adult neurology, clinical neurophysiology, and IONM. While being a neurologist is his primary job function by day, in his spare time Dr. Ahuja enjoys hiking, traveling, and spending time with friends and family.

Dr. Ahuja graduated from New York University in 2008, completing his BA in chemistry with a minor in linguistics. He went on to attend The University of Toledo College of Medicine in Toledo, Ohio and graduated with his medical degree in 2012. He then completed his preliminary medicine internship at Boston Medical Center, Boston, Massachusetts in 2013. He completed his residency at the MedStar Georgetown – NIH Neurology Residency Program, Washington, DC in 2016 where he also served as chief resident. Dr. Ahuja then moved to California where he completed his fellowship in clinical neurophysiology with a focus on IONM at Stanford University Medical Center in Palo Alto, California in June 2017. Dr. Ahuja joined RTNA in July 2017 and currently resides in Las Vegas, NV.

Certifications: Dr. Ahuja obtained his board certification in Neurology in 2016. 

Memberships: Dr. Ahuja is a member of the American Society of Neurophysiologic Monitoring, the American Clinical Neurophysiology Society, and the American Academy of Neurology.

Megan Alcauskas, M.D.

Dr. Megan Alcauskas has practiced intraoperative neurophysiological monitoring for the past twelve years.  She is the Chairperson of RTNA’s Institutional Review Board and the Co-Chairperson of RTNA’s Research Committee.  Her current research interests include relating significant intraoperative monitoring changes to patient and procedural factors.  Dr. Alcauskas previously served on the Quality Assurance Committee, Standards Committee and Education Committee as well as the Director of Education for RTNA.

Outside of RTNA, Dr. Alcauskas serves on the Editorial Board of the journal, Neurology, and on the Board of Directors of the American Society of Neurophysiological Monitoring.

Dr. Alcauskas received her medical degree from Columbia University College of Physicians and Surgeons in New York City in 2005. She completed her internship in internal medicine at Lenox Hill Hospital in 2006 and her neurology residency at Mount Sinai School of Medicine in 2009. Dr. Alcauskas was then asked to join the faculty at Mount Sinai where she practiced intraoperative neuromonitoring and general neurology.  There she also served as the Neurology Clerkship Director and the Neurology Residency Assistant Director.  Dr. Alcauskas resides in St. Petersburg, Florida.

Certifications: Dr. Alcauskas is board certified in Neurology (2009)

Memberships: Dr. Alcauskas is a member of the American Academy of Neurology and the American Society of Neurophysiological Monitoring.

Melissa Balbuena-Root, M.D.

As a neurologist, Dr. Melissa Balbuena-Root sees the direct impact that high-quality, real-time neurologic care can have on surgical outcomes.  She values collaborating with clinical teams, working to avoid damage to the patient’s nervous system and improve patient care. 

Dr. Balbuena-Root completed both her undergraduate studies and master’s degree at University of Southern California.  She then attended Eastern Virginia Medical School to earn her medical degree.  Dr. Balbuena-Root completed her residency in Neurology as well as a fellowship in Clinical Neurophysiology at Barrow Neurological Institute, Phoenix, AZ.

Dr Balbuena-Root co-authored, “Controversy Over Cesarean Sections: Examining the Trend Through a Cultural Lens” in The Journal of the American Osteopathic Association (2013) and “Cultural and Societal Implications on Family Planning” in the Global Studies Journal (2014).  Additionally, she presents lectures on general neurology, clinical neurophysiology, and epilepsy.  In her spare time, Dr. Balbuena-Root enjoys cooking, playing with her dog, and spending time with family and friends.

Certifications: Dr. Balbuena-Root is board certified in Neurology (2020). 

Memberships:  Dr. Balbuena-Root is a member of the American Epilepsy Society, the American Clinical Neurophysiology Society, and the American Academy of Neurology.

Jonathan Chen, M.D.

Dr. Jonathan Chen graduated from the University of California, Berkeley with a B.A. degree in molecular and cell biology and cognitive science (2007). He then earned his medical degree at New York Medical College (2013). In 2013, Dr. Chen began his medical training at California Pacific Medical Center-Pacific Campus as an intern resident of internal medicine. This was followed by his neurology residency at LAC+USC Medical Center (2014-2017) and his fellowship of intraoperative neuromonitoring at the Keck School of Medicine (2017). Dr. Chen is a staff neurologist at RTNA and resides in southern California.

Certifications: Dr. Chen is board certified in Neurology (2017).

Marcos Cruz, M.D.

Dr. Marcos Cruz completed pre-medicine training at the University of Puerto Rico before completing his medical training in New York Medical College in Valhalla, NY (2002). He chose pediatrics as his residency program at University Pediatric Hospital, Puerto Rico (2004). Dr. Cruz completed a fellowship in Neurology with special qualifications in Child Neurology through St. Christopher’s Hospital for Children and Hahneman University Hospital, PA (2008). After moving to Tennessee, Dr. Cruz completed a Neurophysiology fellowship at Vanderbilt University Medical Center (2009) and remained on staff as Assistant Professor of Neurology (2011). In 2009, Dr. Cruz opened his private practice in neurology (C & C Neurological Associates, PLLC).  He joined the staff of Real Time Neuromonitoring Associates in January 2011. Dr. Cruz resides in Hendersonville, TN.

Certifications: Dr. Cruz is board certified in Neurology with special qualifications in Child Neurology (2008), Clinical Neurophysiology (2014).

Memberships: Dr. Cruz is a member of the American Clinical Neurophysiology Society, American Academy of Neurology, Child Neurology Society, the American Academy of Pediatrics, and the American Society of Neurophysiologic Monitoring.

Kira Dillard, M.D.

Dr. Kira Dillard has a passion for providing real-time nervous system information to OR surgical teams, problem solving, and supporting positive surgical outcomes.  With experience in intraoperative neuromonitoring, EEG and epilepsy management, she appreciates the importance of neurophysiology in practice and feels the IONM field has significant potential for new avenues of exploration and understanding.

Dr. Dillard attended the American University of the Caribbean to earn her medical degree.  She completed her residency in Neurology at the University of Tennessee Health Science Center.  She then furthered her education by completing a fellowship in Clinical Neurophysiology at the University of California Los Angeles. 

Dr. Dillard co-authored, “Blood pressure levels post mechanical thrombectomy and outcomes in large vessel occlusion strokes” in Neurology (2017), “Elevated pulse pressure levels are associated with increased in-hospital mortality in acute spontaneous intracerebral hemorrhage” in the American Journal of Hypertension (2017), “Admission hyperglycemia and outcomes in large vessel occlusion strokes treated with mechanical thrombectomy” in the Journal of NeuroInterventional Surgery (2017), and “Higher low-density lipoprotein cholesterol levels are associated with decreased mortality in patients with intracerebral hemorrhage” in Atherosclerosis (2017).  She currently resides in Los Angeles, CA.

Certifications:  Dr. Dillard is board certified in Neurology (2021).

Memberships:  Dr. Dillard is a member of the American Board of Psychiatry and Neurology, the American Clinical Neurophysiology Society, and the American Academy of Neurology.

Steven Fussner, M.D.

Dr. Steven Fussner is committed to patient safety. He entered the field of Neurology with the focus of preventing neurologic injury in high-risk surgeries. For Dr. Fussner, the most rewarding part of his work is improving patient outcomes by utilizing the most advanced technology.

Dr. Fussner completed his undergraduate studies at Bradley University, Illinois, receiving a degree in Cell and Molecular Biology. He then attended Texas Tech University HSC School of Medicine to attain his medical degree, completing his residency in Neurology at Baylor College of Medicine, Texas. Dr. Fussner continued his education by completing a fellowship in Clinical Neurophysiology at Baylor College of Medicine, Texas. He currently resides in Castle Rock, CO, and enjoys hiking, snowboarding, and spending time with his family.

Certifications: Dr. Fussner is board certified in Neurology (2019).

Memberships: Dr. Fussner is a member of the American Academy of Neurology, the American Clinical Neurophysiology Society, the American Society of Neurophysiological Monitoring, and the American Medical Association.

Vivian Hoang, M.D.

Combine a love for medicine and business and you have Dr. Vivian Hoang. Serving as the Medical Director and a staff physician at RTNA, Dr. Hoang entered this field to explore her passion for clinical neurophysiology and patient care. She enjoys the collaborative atmosphere of the healthcare industry and working with people who are striving to give the best patient care. For Dr. Hoang, the most rewarding part of her work is knowing that she can make a difference in patients’ surgical procedures and their outcomes. 

Dr. Hoang received her medical degree in 2007 from Tulane University School of Medicine in New Orleans. She completed her internship in internal medicine at Tulane University Hospital in 2008, her neurology residency at Georgetown University Hospital in Washington, DC in 2011, and her neurophysiology fellowship at the University of California, Los Angeles in 2013. Dr. Hoang was then asked to join the staff at RTNA where she currently practices intraoperative neuromonitoring. Dr. Hoang resides in Dallas, Texas.

Certifications: Dr. Hoang is board certified in Neurology (2005) and Clinical Neurophysiology (2013).

Memberships: Dr. Hoang is a member of the American Academy of Neurology and the American Clinical Neurophysiology Society.

Eric Kim, M.D.

Dr. Eric Kim consistently aims as a neurologist to ensure effective communication and collaboration to improve patient care. For him, the most rewarding part of the job is the beneficial impact it has on improving patient safety and achieving positive surgical outcomes.

Dr. Kim attended the University of California, Los Angeles, completing a BS in Physiological Science in 2009. He then earned his medical degree at Saint Louis University School of Medicine (MO) in 2013, completing a residency in Neurology at Kaiser Permanente Los Angeles Medical Center (CA) in 2017. Dr. Kim furthered his education by completing a fellowship in Clinical Neurophysiology at the University of California, Los Angeles, and Cedars Sinai Medical Center (CA) in 2018 and a fellowship in Intraoperative Neuromonitoring at the University of Southern California in 2020.

Dr. Kim published, “Success Rate of Obtaining Baseline Somatosensory and Motor Evoked Potentials in 695 Consecutive Cranial and Spine Surgeries,” in the Journal of Clinical Neurophysiology (2020) and presented, “What Could Wide Latency Differences Between Ipsilateral and Contralateral MEP Responses Suggest?,” at the American Clinical Neurophysiology Society Annual Meeting in New Orleans, LA (2020). He currently resides in Los Angeles, CA.

Certifications: Dr. Kim is board certified in ABPN Neurology (2017).

Memberships: Dr. Kim is a member of the American Academy of Neurology and the American Clinical Neurophysiology Society.

Chuong Le, M.D.

Dr. Chuong Le entered the medical field to explore his interest in neurophysiology. As an on-staff RTNA neurologist, Dr. Le loves helping people understand IONM as it relates to patient care and getting to know his colleagues.

Dr. Le attended the University of California, San Diego completing a BS in biology in 2000. He chose to attend St. George’s University Medical School in Grenada, West Indies and graduated with his medical degree in 2005. Dr. Le completed an internship in internal medicine at Brookdale University Hospital, New York in 2006. Following this program, Dr. Le moved to Kentucky to complete his neurology residency at the University of Louisville. He continued his education at the University of Louisville by completing a fellowship in neurophysiology in 2010. In January 2011, Dr. Le joined the staff of RTNA. He currently resides in San Jose, California.

Certifications: Dr. Le is board certified in Neurology (2015).

Memberships: Dr. Le is a member of the American Academy of Neurology, the American Medical Association, and the American Society of Neurophysiological Monitoring.

Michelle Mora, D.O.

Dr. Michelle Mora completed her undergraduate studies at Colorado State University with degrees in chemistry and mathematics. She then completed her medical degree at Touro University College of Osteopathic Medicine in California. Her internship (neurology-tracked) and adult neurology residency were completed though Michigan State University at the St. John Providence Health System in the suburbs of Detroit. Dr. Mora has completed fellowships in clinical neurophysiology, epilepsy, and intraoperative neuromonitoring, all through the University of Michigan in Ann Arbor. She has been a Staff Neurologist at Real Time Neuromonitoring Associates, PC and affiliated entities since 2016. Dr. Mora currently resides in Vallejo, CA and frequently monitors in the company of furry, four-legged office mates.

Certifications: Dr. Mora is board certified in Neurology (2015), Clinical Neurophysiology (2016) and IntraOperative Neurophysiologic Monitoring (ABCN, 2020).

Memberships: Dr. Mora is a member of the American Clinical Neurophysiology Society, the American Epilepsy Society, the American Academy of Neurology, the American Society of Neurophysiological Monitoring, International Society of Intraoperative Neurophysiology, and ASET - The Neurodiagnostic Society.

John Parker, M.D.

Dr. John Parker joined RTNA in 2019. As a neurologist, he has a passion for solving complex problems and a desire to help patients understand the intricacies of their own health. Dr. Parker has extensive experience in the areas of epilepsy, stroke and neurodegenerative diseases as well as a passion for researching advances in the fields of genetics, bioinformatics, and biomedical engineering.

Dr. Parker completed his undergraduate studies at the University of California Berkeley in 2003, followed by a master’s degree from California State University Fullerton in 2008. He received his medical degree from the University of California San Diego in 2013, completing his internship in internal medicine at the University of California Irvine in 2014. Dr. Parker did his residency in Adult Neurology at the University of California Irvine in 2017 and then furthered his education at the University of Southern California by completing a fellowship in Clinical Neurophysiology in 2018 and a fellowship in Clinical Intraoperative Neurophysiological Monitoring in 2019.

Certifications: Dr. Parker is board certified in APBN Adult Neurology (2018).

Memberships: Dr. Parker is a member of the American Academy of Neurology, the American Clinical Neurophysiology Society, and the American Medical Association.

Douglas Porter, M.D.

Dr. Douglas Porter joined the RTNA physician staff in 2014. He entered the field of neurology after seeing the impact that neurological diseases can have on both patients and their families.   With intraoperative monitoring, he has found a rewarding career in working to reduce the risk of neurological injuries during surgery.

Dr. Porter graduated from the Rochester Institute of Technology in 2000 with highest honors, majoring in biology and a minoring in philosophy.  After college, he did several years of pharmaceutical research before beginning medical school at Tufts University School of Medicine in 2003. During medical school, he enrolled in an additional one-year neurophysiology research concentration and helped produce three research publications.

After graduating from Tufts in 2008, Dr. Porter completed a medical internship at Baystate Medical Center in Springfield, Massachusetts (2008–2009) and a neurology residency at Georgetown University Medical Center in Washington, DC (2009–2012). During his final year at Georgetown, he also was Chief Resident. Dr. Porter completed his clinical training with a fellowship in Clinical Neurophysiology and Intraoperative Monitoring at the University of California, Los Angeles (2012-2014).

He currently resides in Washington State.

Certifications: Dr. Porter is board certified in General Neurology (2014) and subspecialty boarded in Clinical Neurophysiology with Intraoperative Monitoring (2014)

Memberships: Dr. Porter is a member of the American Academy of Neurology, the American Clinical Neurophysiology Society, and the American Society of Neuromuscular Monitoring.

Greg Schaublin, M.D.

Dr. Greg Schaublin entered the medical field to explore his passion for clinical neurophysiology and lesion localization. He has spent the majority of his career in the EMG and IONM field and performing inpatient and outpatient general neurology. With experiences in providing EMG guided botulinum toxin injections for various conditions and running an in-office infusions suite for patients requiring intravenous medications, Dr. Schaublin brings a wealth of insight to the RTNA physician team. In his free time, Dr. Schaublin enjoys spending time with his wife and children, running and exercising as much as he can, and attending live sporting and musical events.

Dr. Schaublin is a graduate from the University of Toledo. He received his medical degree (2001) and completed his internship in internal medicine (2002) at the Medical College of Ohio. Dr. Schaublin completed his neurology residency and fellowship in clinical neurophysiology (EMG) at the University of Virginia from 2002 -2006. Post-fellowship, Dr. Schaublin has held positions as a staff neurologist, the director of an in-house hospital IONM program, and as a member of a hospital medical staff quality committee.     

Certifications: Dr. Schaublin is board certified in Neurology (2006),  Clinical Neurophysiology (2006) and Electrodiagnostic Medicine (2007)

Romina Shirka, D.O.

Dr. Romina Shirka graduated from UCLA in Los Angeles, California where she obtained her degree in Psychobiology.  She received her Doctor of Osteopathy from Touro University College of Osteopathic Medicine.  Her internship was completed at Henry Ford Hospital and Henry Ford Wyandotte Hospital.  Dr. Shirka's Neurology residency was completed at Henry Ford Hospital. Dr. Shirka completed a fellowship in Clinical Neurophysiology including training in Intraoperative Neuromonitoring at New York Presbyterian Hospital-Cornell and at Memorial Sloan-Kettering Cancer Center in June of 2012.  She also completed a fellowship in Epilepsy at Yale New Haven Hospital in June 2013. She joined Real Time Neuromonitoring Associates in July of 2013. She currently resides in Henderson, NV.

Certifications: Dr. Shirka is board certified in Neurology (2011) and Epilepsy (2014).

Memberships: Dr. Shirka is a member of the American Academy of Neurology, the American Osteopathic Association, and the Osteopathic Cranial Academy

Cynthia Tainsh, M.D.

Since 2012, Dr. Cynthia Tainsh has been an on-staff neurologist at RTNA. Dr. Tainsh is known for her expertise in electrodiagnostic medicine and her ability to teach others neurology related to surgical cases. The most rewarding part of her job is the opportunity for continuous learning and interacting with colleagues.

Dr. Tainsh graduated Magna Cum Laude from Brown University in Providence, Rhode Island where she obtained her biology degree in 1980. She received her medical degree from the Warren Alpert Medical School of Brown University in 1983 and completed her internship at Beth Israel Deaconess Medical Center, Boston, Massachusetts. Dr. Tainsh's residency was completed at The Harvard Longwood Neurological Training Program under Dr. Martin Samuels where during her final year she served as chief resident. Her clinical work during this time was completed at Beth Israel Hospital and Brigham and Women's Hospital. Dr. Tainsh also completed a fellowship in electromyography at Harvard Medical School and performed her related clinical work at Massachusetts General Hospital. She joined RTNA in August 2012 and resides in Medford, Massachusetts.

Certifications: Dr. Tainsh is board certified in Neurology and Electrodiagnostic Medicine.

Memberships: Dr. Tainsh is a member of the American Society of Neurophysiological Monitoring and the American Clinical Neurophysiology Society.

Daniel Vitantonio, M.D.

Dr. Daniel Vitantonio has an analytic approach to neurophysiology and a genuine interest in its clinical applications. Prior to joining RTNA, Dr. Vitantonio trained in neuro-intraoperative monitoring at Ronald Reagan UCLA Medical Center, where he gained experience in special procedures such as awake carotid/cerebral arterial balloon occlusions, intracarotid amobarbital testing, and brain stimulation mapping in awake craniotomies.

Dr. Vitantonio graduated from Georgetown University School of Medicine (2014) and Lenox Hill Hospital Department of Medicine (2015). He completed his Neurology residency and Clinical Neurophysiology fellowship at UCLA School of Medicine (2018; 2019). Dr. Vitantonio has previous EEG monitoring and inpatient neurological consulting experience at Long Beach Memorial Medical Center and continues as a teaching attending on the EEG/Epilepsy service at the West Los Angeles Veterans Administration and UCLA School of Medicine. He currently resides in Los Angeles, CA, with his wife and daughter.

Certifications: Dr. Vitantonio is board certified in Neurology (2018) and Clinical Neurophysiology (2019).

Memberships: Dr. Vitantonio is a member of the American Clinical Neurophysiology Society and the American Academy of Neurology.

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