Nurse Practitioners Physician Assistants

Lisa Koester-Wiedemann, ANP, CNN-NP
Renal Nurse Practitioner
- Phone: 314-286-0801
- Email: lkoester@wustl.edu
Interests: Clinical coverage of in-center hemodialysis, home dialysis (hemodialysis and peritoneal dialysis), Rehabilitation Institute of St. Louis and chronic kidney disease (CKD) population, quality assurance, dialysis modality options, clinical education.

Dennis P. Littleton, ANP
Nurse Practitioner
- Phone: 314-747-5575
- Email: dlittleton@wustl.edu
Dennis Littleton worked at the Surgical Intensive Care Unit at BJC Hospital for nine years before coming to the Division of Nephrology.

Kelsie Mentz, AGACNP-BC
Transplant Nurse Practitioner
- Phone: 314 362-5365
- Fax: 314-362-5470
- Email: k.mooney@wustl.edu
Interests: I enjoy furthering my clinical knowledge in general nephrology as well as transplant nephrology. In conjunction with my critical care knowledge and background, I appreciate/enjoy learning more about pre-, intra-, and post-transplant nephrology.

Helen Wijeweera, ANP-BC
Nephrology Nurse Practitioner
- Phone: 314-362-5365
- Fax: 314-362-5470
Interests: Immunosuppression and management of risk factors for renal disease, including hypertension, dyslipidemia and diabetes.

Sarah Wingate, BNS, MSN/FNP
Transplant Nurse Practitioner
- Fax: 314-362-5470
- Email: swingate@wustl.edu
Interests: Dedicated to building strong relationships with patients and families and believes that being an advocate for patients will help achieve the best possible outcomes.