Clinical nurse specialist
A clinical nurse specialist (CNS) is an advanced practice nurse who focuses on a specific health problem or patient group. They have graduate-level education (master’s or doctoral) and are experts in evidence-based nursing for their specialty.
CNSs work autonomously and use their deep knowledge of diseases and treatments to assess, diagnose, and treat illnesses. They design, implement, and evaluate care for individuals and communities, and lead programs that improve care quality and make health care more cost-effective. They also mentor other nurses and help teams develop new, evidence-based ways to deliver care.
In many places, CNSs may have prescriptive authority to treat patients with medications and to order tests, in addition to other nursing interventions. They act as patient advocates, consultants, and researchers across hospitals, clinics, and community settings.
In the United States, CNSs are registered nurses with graduate training. There has been debate about requiring a Doctor of Nursing Practice (DNP) for CNS practice. CNSs are described as working across three spheres—patient care, nursing practice, and the health system—aimed at continually improving patient outcomes and care. Their core competencies include leadership, collaboration, evidence-based practice, quality improvement, and ethical decision-making.
Research suggests that including a CNS on care teams can reduce hospital stays and overall costs, by helping to improve outcomes and guide system-wide improvements. Although CNS roles grew out of hospital work, they now practice in many non-acute settings as well. In Australia, however, the term refers to a promotion rather than a qualification.
Overall, CNSs are clinical experts who advance nursing practice, lead innovative care solutions, and strive to improve care for individuals, families, and communities.
This page was last edited on 3 February 2026, at 04:00 (CET).