The nurse accepts a client who is being transferred to the mental health unit and understands that the client is distractible and is exhibiting a decreased ability to concentrate. The nurse has only 15 minutes to talk with the client. To develop a treatment plan for this client, which assessment is most important for the nurse to obtain?

A. Mental status examination: Conducting a mental status examination provides a structured assessment of the client’s current cognitive, emotional, and behavioral functioning. It identifies attention span, concentration, thought processes, and perception, which are critical for developing an effective, individualized treatment plan in a limited time frame. B. Motivation for treatment: While motivation is important for long-term engagement in therapy, it does not provide immediate, objective data about the client’s cognitive or emotional status needed to formulate an initial treatment plan. C. Medication compliance: Assessing adherence to prescribed medications is relevant for ongoing care and management but does not directly inform the nurse about the client’s current mental functioning, which is essential for immediate treatment planning. D. History of substance use: Past substance use is important for risk assessment and treatment considerations, yet it does not provide real-time information about the client’s present mental state or ability to participate in care during the brief interaction.