Background/Objectives: The implementation of advanced practice nursing in Kazakhstan is aimed at improving the accessibility and quality of primary healthcare. One of the key indicators of the effectiveness of this model is patient satisfaction, which reflects the perceived quality of care and directly influences treatment adherence. The aim of the study was to assess patient satisfaction with nurse-led consultations in primary healthcare institutions in Kazakhstan. Methods: A cross-sectional study was conducted using a questionnaire developed on the basis of Karin Bergman’s instrument and adapted to the Kazakhstani context. A total of 621 patients who attended independent nursing consultations in polyclinics in Aktobe, Almaty, Astana, and the village of Merke participated in the survey. Descriptive statistics and Pearson’s χ² test were applied, with statistical significance set at p < 0.05. Results: The majority of respondents were women, with a median age of 61 years. Awareness of independent consultations was higher among patients who regularly visited nurses (97.1% vs. 86.9%; p < 0.006). High satisfaction levels were associated with service accessibility, quality of examination, and clarity of recommendations. Among regular visitors, 99.2% reported satisfaction with the nurse’s work, and 76.6% rated the service as “excellent”. In contrast, patients with irregular visits more often reported dissatisfaction due to insufficient attention and limited knowledge of nurses. Conclusions: The findings confirm a high level of patient satisfaction with advanced practice nursing services and highlight the importance of this model in strengthening primary healthcare in Kazakhstan.