Our Team

Our pioneering surgeons, endocrinologists, podiatrists and wound nurses use their skills to develop personalized treatment plans for diabetic patients. Our experts come from a variety of departments and specialties at Johns Hopkins and are available to assist patients during every step of their journey.


  • Christopher Joseph Abularrage, M.D.

    • The Bertram M. Bernheim Professor of Surgery
    • Director, Diabetic Foot and Wound Clinic
    • Fellowship Program Director, Vascular Surgery & Endovascular Therapy
    • Associate Director, Limb Preservation and Wound Care Fellowship
    • Professor of Surgery
  • Nestoras Nicolas Mathioudakis, M.D., M.H.S.

    • Co-Medical Director of Johns Hopkins Medicine Diabetes Prevention & Education Program
    • Lead, Diabetes Clinical Community, Armstrong Institute for Patient Safety and Quality
    • Co-Director, Multi-Disciplinary Diabetes Foot Wound Clinic
    • Associate Professor of Medicine
  • Ronald L Sherman, D.P.M., M.B.A.

    • Podiatric Surgery
    • Director, Limb Preservation and Wound Care Fellowship
    • Assistant Professor of Surgery


  • James Robert Ficke, M.D.

    • Robert A. Robinson Professor of Orthopaedic Surgery
    • Director, Department of Orthopaedic Surgery
    • Orthopaedist-in-Chief, The Johns Hopkins Hospital
    • Professor of Orthopaedic Surgery
  • Caitlin W. Hicks, M.D., M.S.

    • Associate Fellowship Program Director, Vascular Surgery & Endovascular Therapy
    • Director of Research, Multidisciplinary Diabetic Foot and Wound Service
    • Associate Director, Limb Preservation and Wound Care Fellowship
    • Associate Professor of Surgery
  • Christopher Kirk Lippincott, M.D., M.P.H.

    • Clinical Director, Johns Hopkins Center for Nontuberculous Mycobacteria and Bronchiectasis
    • Assistant Professor of Medicine

Clinical Staff

Kathryn Hines, MSHS, PA-C, Director of Surgical Advanced Practice

Kathryn Hines is the director of surgical advanced practice, and the administrative director for the Multidisciplinary Diabetic Foot and Wound clinic. She completed a master’s degree in health sciences at the George Washington University in Washington, D.C. and her surgical residency for physician assistants at the Johns Hopkins Hospital, where she was awarded Outstanding Surgical PA Resident of the Year. During her time with the Johns Hopkins surgical department, Ms. Hines was also co-director and instructor of the Advanced Surgical Training Program for PAs at the George Washington University. Her research has been published in the Annals of Vascular Surgery and the Journal of the American Academy of Physician Assistants. 

Kathryn Hines, MSHS, PA-C

DeEtta McKnight, B.S.N., R.N.

DeEtta McKnight earned her Bachelor’s Degree in Nursing from State University of New York at Brockport. Prior to joining the Vascular Service at Johns Hopkins Hospital, she was a Home Care Nurse for over 30 years. As a Wound Treatment Associate (WTA) and Ostomy Treatment Associate (OTA), she served a wide variety of complex needs for patients in the community. With her vast experience and nursing expertise, she is a vital part of the Vascular Team. She specializes in Wound Care and Limb Preservation in the Diabetic Foot Wound Clinic (DFWC).

headshot of DeEtta McKnight

Caitlin Nass, CRNP, Adult Nurse Practitioner

Caitlin Nass is an adult nurse practitioner with the Hopkins Diabetes Center.  Her clinical focus is on disease management, education, and health promotion for patients with complex, chronic conditions including diabetes and heart disease. In addition to patient care, she has experience leading quality improvement initiatives, nursing education, and in clinical research. She has authored articles on cardiac risk assessment, cardiac risk reduction, and chronic kidney disease. She earned both her B.S.N. and M.S.N. at the Johns Hopkins School of Nursing. 

Ciatlin Nass, MSN

Mark Hopkins, PT, CPO, MBA, Physical Therapist and Prosthetist/Orthotist

Mark Hopkins, PT, CPO, MBA is CEO and President of Dankmeyer, Inc. Mark is a licensed physical therapist in the State of Maryland and an ABC certified Prosthetist/Orthotist with 29 years of experience in clinical practice, clinical research and physical therapist education and training. He has adjunct faculty appointments in the Johns Hopkins Medical School Department of Physical Medicine and Rehabilitation and the University of Maryland Medical School Department of Physical Therapy and Rehabilitation Sciences and is a guest lecturer at several local and regional physical therapy programs including the University of Delaware. He is active in professional continuing education seminars and training for physicians and physical therapists. He obtained his PT degree from the University of Delaware, prosthetist training at Northwestern University and his MBA from the Johns Hopkins University. Mark is a member of the American Physical Therapy Association, the American Academy of Orthotists and Prosthetists, the International Society of Orthotists and Prosthetists and the Amputee Coalition.

Mark Hopkins