Empowerment • Partnership • Service
Corporate Leadership
Ameet Vohra, MD
Executive Chairman
Dr. Ameet Vohra is the Founder and Executive Chairman of Vohra Wound Physicians. Dr. Vohra obtained his medical degree from Imperial College London. After working for the British National Health Service, he relocated to Miami, FL, where he completed an internal medicine residency at Mount Sinai Medical Center and The University of Miami.
Dr. Vohra joined the Mount Sinai Medical Center faculty and went on to specialize in wound care. He practiced this specialty at the hospital’s wound care center before starting his own practice in 2000. Due to an overwhelming demand for wound care services in post-acute centers, Dr. Vohra developed a training program for physicians in the specialty of wound care and expanded his practice. Today, Vohra Wound Physicians is the largest wound care physician group serving post-acute care facilities.
Peter Winn, DBA
Chief Executive Officer
Peter Winn joined the company in 2004 and has been responsible for many varied roles within the organization pertaining to business development, operations, sales and physician recruiting. He currently serves as the Chief Executive Officer. Prior to Vohra, he worked in the marketing and sales training divisions of Wyeth Pharmaceuticals and Parke-Davis. Peter studied Medical Microbiology and Bacteriology at the University of Nottingham, Queens Royal Medical Centre, England. Earned his MBA from Nova Southeastern University, Huizinga School of Business, and doctoral studies at The Swiss School of Business.
Natalia Mosquera, MBA
Chief Operating Officer
Natalia Mosquera joined Vohra in 2013. Today, Natalia leads the company’s operations including Revenue Cycle Management, offshore back-end operations, Surgical Dressings Dispensing and the Advanced Wound Care Products Division.
She is a dynamic and innovative leader offering 20 years in healthcare, consistently showing her flair for amplifying growth, enhancing performance, and securing profits. She leads with a balance of keen analytical insight and team collaboration.
She earlier served Vohra as Director of Strategic Partnerships and VP of Operations bringing innovation and operational excellence to the company. She implemented an in-house revenue cycle management system, initiated and established off shoring operations, introduced robotic process automation and started the company’s educational program and Nurse Certification.
Prior to Vohra, Natalia worked for Avisena, a medical billing company and practice management software solutions. Having dual roles as VP of Revenue Cycle Management and VP of Client Services, Natalia played a key role in all strategic decisions and investor relations while managing all corporate initiatives across all business units.
Natalia holds magna cum laude bachelor’s degree in industrial and systems Engineering, as well as an Executive MBA from Florida International University. She is also a Six Sigma Black Belt, as well as certified in Lean Thinking. She recently completed the “Managing Health Care Delivery” program at Harvard Business School.
Vishal Modi
Chief Technology Officer
Vishal Modi is the Chief Technology Officer at Vohra Wound Physicians. He joined the company in 2019 and brings more than 20 years of experience in software development across the healthcare sector. He has proven expertise in product development including the coordination of product design, budgeting, release planning, change management and product roadmap planning. He is responsible for Vohra’s level of adaptability to the latest technology in health as well as methods to continue improving the patient experience. Prior to his role at Vohra Wound Physicians, Modi served as senior director of software development at Optum, a pharmacy benefit manager and care services group operating across 150 countries in North America, South America, Europe, Asia Pacific and the Middle East. He received his Bachelor of Science at St. Xavier’s College.
Chris Masterson, RN, LNHA, WCC
Chief Nursing Officer
Chris Masterson joined Vohra in June 2019 after 26 years of hands on clinical and healthcare management experience. Chris is a Registered Nurse and Licensed Nursing Home Administrator. Additionally, he is Wound Care Certified by the National Alliance of Wound Care and Ostomy.
Prior to joining Vohra, Chris served as Senior Vice President of Clinical Operations for over 15 years with a large multi-facility SNF owner/operator. During that time, he trained, coached, and directed employees to peak clinical performance levels while encouraging professional development and progression. Chris received the LTC Innovation Award from McKnight’s and continues to serve as a member of the Senior Clinician’s Council for the Florida Health Care Association.
Nahier Alvarez
Financial Controller
Nahier received her Bachelor of Accounting from Florida International University. As a Senior Healthcare Accountant, Nahier has played a pivotal role in the financial management of numerous healthcare organizations including Baptist Health South Florida and Leon Medical Centers.
Nahier joined Vohra Physicians in 2010.
She is a dynamic financial leader who has risen within the organization to become our Financial Controller.
Nahier has a deep understanding of the our operations, culture, and financial landscape, with a passion for precision and an exceptional eye for financial detail. She specializes in healthcare finance, industry regulations and financial compliance. Nahier is committed to leveraging her expertise to driving financial efficiency, optimizing processes within the finance department and always striving for fiscal excellence.
William Weyrowski, JD, MBA, LLM
General Counsel
William received his Juris Doctorate from St. Thomas University in Miami, FL, and serves as the General Counsel at Vohra Wound Physicians. A Michigan native now residing in a small beach town of Surfside, Florida, he has 20 years of corporate and compliance experience. William is a member of the Florida Bar and has served as General Counsel for several national companies in the advertising, data privacy and healthcare fields. William specializes in corporate governance, M&A, and compliance. When he is not working, William enjoys outdoor activities with his wife and daughter, travels often and he can usually be found working on an old Jeep or motorcycle.
Clinical Leadership
Shark Bird, MD, CMD, CWSP
Chief Medical Officer
Shark Bird, M.D. (IN) joined Vohra in 2004 and is the Chief Medical Officer. He oversees clinical staff, clinician training, and the wound Fellowship Program.
Dr Bird completed his family practice residency at West Virginia University School of Medicine and Medical School at Marshall University School of Medicine. He has numerous publications in the American Journal of Sports Medicine, and Best Care Practices for FMDA. He currently serves on the board for the Florida Medical Directors Association (FMDA) and is a delegate to the American Medical Director Association (AMDA).
Dr Bird is a Certified Wound Specialist Physician (CWSP) from the American Board of Wound Management, and a Certified Medical Director (CMD) from the American Medical Director Association.
Janet S. Mackenzie, MD, ABPS, CWSP, AAGP
Chief Medical Officer
Janet Mackenzie, C.M.O. (MD) joined Vohra Wound Physicians in 2013. She brings extensive clinical experience to the role, combined with years of experience in physician supervision and teaching, both academically and with the Vohra Wound Fellowship Program. Dr. Mackenzie has presented wound care lectures at both regional (FMDA) and national (AMDA) conferences.
Prior to joining Vohra, she practiced plastic surgery. She completed a Master’s degree in Education and obtained her Medical Degree at the University of Pennsylvania Perelman School of Medicine. Dr. Mackenzie trained in general surgery at Dartmouth Hitchcock Medical Center and plastic surgery at McGill University. She is board certified by the American Board of Plastic Surgery, the American Board of Wound Management, and the American Board of General Medicine, and is a Certified Wound Specialist Physician (CWSP).
Katie Hoskins, MD, CWSP
Director of EHR
Katie Hoskins, M.D. (MD) has been working with Vohra Wound Physicians since 2011. She previously studied Brain and Cognitive Sciences, Music, and Internal Medicine at the University of Rochester as part of an early medical scholar program and graduated Magna Cum Laude and Phi Beta Kappa.
While working with Vohra she is instrumental within a number of teams, including physician training, alpha/beta testing and EHR development, SLS moderating, and the DDP program. She is a Certified Wound Specialist Physician (CWSP) from the American Board of Wound Management.
Angela Crawford, MD, CWSP
Fellowship Director
Angela M. Crawford, M.D. (FL) is a General Surgeon and Vohra Wound Care physician. Dr. Crawford graduated from University of Science, Arts & Technology (USAT), College of Medicine and attended General Surgery residency at the University of Maryland Medical Center, Baltimore, Maryland.
She has completed extensive research in Trauma Surgery and Critical Care at R Adams Cowley Shock Trauma Center in Baltimore, Maryland. She is a trainer for new Vohra wound care physicians and part of the beta testing team for the Vohra telemedicine EMR platform. She is a Certified Wound Specialist Physician (CWSP) from the American Board of Wound Management.
Melissa Bray, MD, CWSP
Fellowship Director and Head of Quality Assurance
Melissa Bray, M.D. (IL, IN) obtained her medical degree from the University of Iowa Carver College of Medicine and trained in Family Medicine. In her leadership role at Vohra Wound Physicians, Dr. Bray encourages continuous learning, provides Inservice lectures on various aspects of wound care, and speaks at multiple conferences. She is also responsible for training new physicians as a Vohra Fellowship Director.
In addition, Dr. Bray promotes excellence by authoring educational articles and heading the Vohra Quality Assurance program. She is a Certified Wound Specialist Physician (CWSP) from the American Board of Wound Management.
Marlene O’Brien MD, PhD
Regional Medical Director and Lead Wound Care Fellowship Director
After completing a PhD in Pharmacology, Dr. O’Brien enrolled at the University of Rochester School of Medicine in Rochester NY, where she graduated and went on to complete an integrated vascular surgery residency in 2017. Before joining Vohra Wound Physicians in 2019, Dr. O’Brien practiced as a vascular surgeon at Jefferson Health in NJ.
She is responsible for numerous medical publications and clinical abstracts in the field of pharmacology and vascular surgery and was recognized as a top female doctor in SJ Magazine.
Dr. O’Brien currently serves as Regional Medical Director and is Head of the Vohra Wound Care Fellowship Program.
Virginia Killoren, MD
Regional Medical Director
Virginia Killoren, M.D. (NC) joined Vohra Wound Physicians in 2017. She completed a Family Medicine residency and Sports Medicine fellowship at John Peter Smith in Ft. Worth, TX. Upon completion, she became faculty for the Sports Medicine Fellowship and International Clinic.
In 2008, Dr. Killoren moved to Nairobi, Kenya where she provided care for refugees and expatriate workers until her return to the United States in 2016. She continues to volunteer her time advising international workers around the globe.
Rebecca McGuigan, MD, CWSP
Regional Medical Director
Rebecca McGuigan, M.D. (VA) joined Vohra Wound Physicians in 2015. She is a graduate of the United States Military Academy at West Point and Harvard Medical School. She completed her General Surgery Residency at Madigan Army Medical Center and previously served in the U.S. Army as Chief of the General Surgery Clinic Department at Martin Army Medical Center at Fort Benning, GA. Dr. McGuigan performed three tours of duty in Afghanistan in support of Operation Enduring Freedom (OEF). She earned three Meritorious Service Medals and was honorably discharged with the rank of Lieutenant Colonel.
Dr. McGuigan is board certified with the American Board of Surgery and the American Board of Wound Management and is a Certified Wound Specialist Physician (CWSP).
Dennis Ng, MD, CWSP
Regional Medical Director
Dennis Ng, M.D. (CT) joined Vohra Wound Physicians in 2013. Prior to joining Vohra Wound Physicians, Dr. Ng practiced vascular surgery at Portsmouth Regional Hospital where he performed catheter-based endovascular interventions and open vascular operations. He also served as the medical director for the Hyperbaric Oxygen Therapy and Wound Center. Dr. Ng completed his undergraduate at Cornell University with a Bachelor of Arts in Organic Chemistry and Biochemistry and obtained his Master of Medical Sciences from Boston University School of Medicine.
Dr. Ng is Board Certified by from the American Board of Wound Management and is a Certified Wound Specialist Physician (CWSP).
James Kramer, MD, CWSP
Regional Medical Director
James Kramer, M.D. (PA) joined Vohra Wound Physicians in 2012. Since then he has been instrumental in the development of the Vohra Fellowship Program, a 6-month in depth mentoring curriculum for all physicians joining the practice. He currently serves as Senior Director of the program. He also leads the Vohra Onboarding and Training Team.
Dr. Kramer joined the practice with a background in General Surgery. He earned his Medical Degree from the Medical College of Virginia at VCU. He was trained in General Surgery at the Robert Packer Hospital in Sayre, PA. He is Board Certified by the American Board of Surgery, and wound certified through the American Board of Wound Management (CWSP).