What Are the Main Responsibilities of a Nursing Assistant?

Nursing assistant job descriptions vary by employer, but nearly all of them sort into five groupings: assisting with personal care and daily living activities, helping with mobility and positioning, taking and recording delegated measurements, observing and reporting changes to the licensed nurse, and maintaining a safe and dignified environment. All five are performed under the supervision of a licensed nurse, who retains responsibility for assessment and care planning. The federal rule governing approved nurse aide training programs requires instruction in these same broad areas, including basic nursing skills, personal care skills, residents' rights, and care of cognitively impaired residents (42 CFR § 483.152).

The five groupings

• Personal care and activities of daily living. Bathing, oral care, grooming, dressing, toileting, and assistance with eating and drinking. This is the largest share of most shifts and the area most heavily represented in required curricula and in skills testing.
• Mobility, transfers, and positioning. Helping someone move from bed to chair, ambulate with a device, reposition to relieve pressure, or use a mechanical lift, with attention to the aide's own body mechanics as well as the patient's safety.
• Delegated measurement and recording. Vital signs, height and weight, and intake and output, documented according to the employer's system. The aide collects and records; interpreting the numbers and deciding what to do about them belongs to licensed staff.
• Observation and reporting. Noticing and promptly communicating changes in condition, appetite, mood, skin, or behavior. Because aides spend the most continuous time at the bedside, this reporting function is a substantial part of the role's value rather than an afterthought.
• Safety, environment, and rights. Infection control practices, call light response, fall-risk precautions, clean and orderly rooms, and respect for privacy and residents' rights.

Where the boundary of the role sits

The scope of a nursing assistant is defined by what a licensed nurse may delegate and by what each state permits. Tasks that require clinical judgment — assessment, care planning, and in most states medication administration absent a separate endorsement — fall outside it. This boundary is not a matter of seniority or confidence; it is a legal line, and the fastest way to establish where it sits in a given workplace is to read the state's own scope documents and the employer's policies rather than to generalize from what aides do elsewhere.

Because the credential is issued and administered state by state, the specific list of permitted tasks, required training content beyond the federal floor, and documentation expectations differ. Federal regulation sets conditions that state programs must satisfy; the requirements a candidate actually encounters come from their own state agency. Pennsylvania's nurse aide testing materials show what that looks like in one state's practice.

How responsibilities differ by setting

The five groupings persist across settings, but their weighting shifts. In long-term care, personal care and mobility dominate and relationships with residents are long-running. In acute care, measurement, transport, and rapid turnover feature more heavily. On a postpartum or mother-baby unit, the same core duties take on a teaching-adjacent character around infant care and feeding support, which is why those units are staffed and organized distinctively; see what nursing assistants do on mother-baby units for that specialty picture.

If your interest in responsibilities is really an interest in what gets tested, the overlap is close but not identical. The practical skills an evaluator may ask a candidate to demonstrate are drawn from the personal-care list in the federal rule; the subjects covered by the nurse aide competency exam explains how that mapping works.