A client's home log shows an average blood pressure of 138/88 millimeters of mercury over three months with no cardiovascular disease and no diabetes and no previous antihypertensive treatment. What is the best initial plan?

A home blood pressure average of 138/88 mmHg sustained over three months classifies this client as having Stage 1 hypertension according to the 2017 ACC/AHA guidelines, which define Stage 1 as 130–139/80–89 mmHg, or Stage 2 depending on the guideline used. In the absence of cardiovascular disease, diabetes, or prior antihypertensive treatment, current evidence-based guidelines recommend beginning with non-pharmacological interventions — lifestyle modifications including dietary changes, weight loss, exercise, sodium restriction, and reduction of alcohol use — before initiating medication. Reassessment in three to six months allows time to evaluate the effectiveness of these changes. Documenting as normal and ending follow-up is incorrect because 138/88 is above the normal threshold and requires monitoring and management. Immediate evaluation for secondary causes such as renal artery stenosis or primary aldosteronism is not warranted as a first step for a patient at this modest blood pressure level without clinical red flags. Sending the patient to the emergency department for hypertensive crisis is entirely inappropriate; a hypertensive crisis involves blood pressure above 180/120 mmHg with end-organ damage. The best initial plan reinforces lifestyle modifications and schedules a follow-up, aligning with guidelines for low-to-moderate cardiovascular risk patients.