Careers in healthcare: what a CNA does

A Certified Nursing Assistant, or CNA, is often the person spending the most hands-on time with a patient — more than the doctor, and often more than the nurse. Here's what the job actually involves, where it's typically done, and how it fits into a longer career in healthcare.

A typical day

CNAs help patients with the basic activities of daily living: bathing, dressing, using the restroom, and moving safely between a bed, wheelchair, or chair. They take and record vital signs — temperature, blood pressure, pulse, and respiration — and assist with feeding patients who need help. A CNA is also often the first to notice a change in a patient's condition, and part of the job is communicating that to the supervising nurse promptly and clearly.

Where CNAs work

Hospitals, skilled nursing facilities and nursing homes, assisted living communities, home health agencies, hospice care, and rehabilitation centers all employ CNAs. The pace and setting differ — a hospital floor moves differently than a long-term care facility — but the core skills carry across all of them.

The certification path in California

In California, becoming a CNA generally means completing a training program approved by the California Department of Public Health (CDPH), which combines classroom instruction with supervised clinical practice in a real care setting. Candidates also go through a criminal background check (Live Scan) and typically a health screening, including tuberculosis testing, before clinical hours begin. After finishing an approved program, candidates take the state competency exam — a written portion and a skills demonstration — and, once they pass, are added to California's CNA registry. Certification has to be renewed periodically, which usually involves proof of continued work experience or continuing education.

Where it can lead

For a lot of people, CNA work is the entry point into a longer healthcare career rather than the destination. The clinical experience it provides is a common stepping stone toward becoming a Licensed Vocational Nurse (LVN) and, from there, a Registered Nurse (RN) — each step building on the patient care skills learned at the CNA level.