Meet Our Leaders

Nathaniel V. Zuziak, D.O., Medical Director

Nathaniel is a physiatrist board certified by the American Board of Physical Medicine and Rehabilitation (ABPMR) and American Board of Quality Assurance and Utilization Review Physicians (ABQAURP). He is the Founder and Chief Medical Officer of Transcendent Physiatry & Rehabilitation LLC and previously served as the Medical Director of Indianapolis Rehabilitation Hospital as well as Lafayette Regional Rehabilitation Hospital. As medical director, he was the physician leader accountable for the management of the treatment team and medical staff, quality of care, safety initiatives, and the physician processes.

Dr. Zuziak treats a wide variety of neuromusculoskeletal conditions but holds particular interests in spinal cord injury, spasticity, preventative medicine, healthcare technology and future models of health care delivery. He has authored and co-authored multiple research projects and manual chapters involving spinal cord injury, travel, and accessibility which have been presented at national conferences. As a resident physician, Dr. Zuziak served as the President, Past President, Board of Governors ex-officio member, and Medical Education Committee Liaison for the American Academy of Physical Medicine and Rehabilitation’s Physiatrist in Training Council.

Dr. Zuziak earned both his Bachelor of Science in Exercise Science and Bachelor of Business Administration in Finance from Eastern Michigan University where he graduated Cum Laude. While there, he served as President of the Exercise Science Organization and Chemistry Club while pursuing clinical research within the Sports Medicine Department.

After receiving his Doctor of Osteopathic Medicine from Michigan State University, Dr. Zuziak completed a residency in Physical Medicine and Rehabilitation at Mercy Medical Center in New York. He presided as Chief Resident for two terms, worked to create the programs first medical administration rotation with the Chief Medical Officer and assisted in successfully leading his program through ACGME accreditation and CLER site visits.

Dr. Zuziak is a native of Michigan and in his leisure time enjoys music, travel, cuisine, scuba diving, hockey and hiking with his Siberian Husky.

Trenton Shoda, Director of Pharmacy

Trenton attended Purdue University earning his Doctor of Pharmacy degree in 2015.  He has 7 years of leadership experience and 10 years of experience within the pharmacy profession including retail, long-term care, and hospital.  His passion for leadership stems from his dedication to providing excellent care for every patient.  He loves spending time with his three boys and wife of 6 years whether that be playing outside or a weekend trip to a favorite destination.

To him there is nothing more important than family.

Renee Spanburg, PT, Director of Case Management and Patient Outcomes

Renee provides on going support and leadership for the case management team during a patient’s stay as they plan toward discharge. Her team’s goal is to discharge all patients back home with the necessary equipment and family training.

Renee earned a Physical Therapy degree from Indiana University and has worked in rehabilitation for the past 28 years. She has a wide variety of clinical and operational experience in both inpatient and outpatient rehabilitation.

Renee and her family recently relocated back to South Bend which is her hometown. She has 2 kids that are college students and a wonderful husband of 22 years. She enjoys watching ND football and spending time with her extended family.

Sharon Farwell, Director of Therapy Operations

Sharon brings over 30 years of experience in operational and clinical leadership to the Rehabilitation Hospital of Northern Indiana.  Her background includes primarily inpatient rehabilitation with special interest in treatment of patients who have had strokes and brain injuries.  She also has supervisory experience in outpatient brain injury and neurological services, transitional care, and inpatient acute care therapy.

Sharon received a bachelor of science degree and a master of science degree in Speech-Language Pathology from Purdue University and is a member of the American Speech, Language and Hearing Association.

When Sharon isn’t working, she enjoys being active in multiple church activities, traveling, and spending time with family and friends.

Meridith Mayberry, Director of Marketing and Business Development

Meridith is from Martins Ferry, Ohio, and attended Ohio University, earning her bachelor’s degree in long-term health services administration. Meridith joined the Rehabilitation Hospital of Northern Indiana in January 2022.  Meridith has over 15 years of experience in the healthcare industry, including assisted living, skilled nursing facilities, hospice, and her most recent position as the business development liaison here at RNHI. She has served on various boards in Ohio stemming from the Arthritis Foundation, Dublin Food Pantry, and county task forces on aging.  Her passion for this hospital stems from the patients’ outcomes and the dedication, determination, and care of her coworkers.

In her off time, Meridith loves spending time with her husband Lance, family, and their two dogs on whatever adventures they may find.

Stephanie Sherbun, Director of Compliance

Stephanie has been a registered nurse for over 24 years. She first obtained her associate’s degree in nursing from Southwestern Michigan College. She then went on to earn her bachelor’s degree in nursing from Indiana Wesleyan University. After having spent most of her nursing career in procedural areas, such as surgery, interventional radiology and cath lab, Stephanie moved into healthcare risk management. She then went on to earn a master’s degree in jurisprudence and health law at Loyola University in Chicago.

Stephanie has worked in healthcare risk management for over 7 years, additionally earning her Certified Professional in Healthcare Risk Management certification. Stephanie was born and raised in South Bend, Indiana. She has two children, of which are both grown.

She enjoys spending her free time with her husband, Kevin, enjoying adventures outdoors and traveling.  Stephanie joined our team in the summer of 2023.  Her goals are to continue to improve upon quality patient outcomes and patient safety.

Jamie Smith, Human Resource Manager

Jamie has her Master’s Degree in Human Resource Management from Indiana Wesleyan University. She has six years of experience in human resources. She loves working one on one with employees to further their education, set career goals and help them grow their careers with our company. Outside of work, her life focuses on her family. She loves outdoor activities such as kayaking and hiking with her girls.

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