In Indonesia, Type 2 diabetes mellitus management generally involves two approaches: pharmacological and non-pharmacological treatments. Complementary and alternative medicine (CAM) has emerged as an alternative approach that may help reduce blood glucose levels. However, evidence regarding the patterns of CAM utilization among patients with type 2 diabetes mellitus in Banjarmasin remains limited. This study contributed to describing the use of CAM among patients with type 2 diabetes mellitus at the Pekauman Community Health Center as a nursing implication. This study employed a descriptive quantitative design. A total of 90 respondents were selected using a purposive sampling method. Data were collected using a questionnaire adapted by the researcher from previous studies. The results showed that 95.6% of respondents used complementary therapy, with herbal therapy being the most commonly used type (85.6%). The primary source of information was family members (33.3%). Most respondents had been diagnosed with diabetes for 1–2 years (43.3%), and the majority expressed positive beliefs regarding the use of CAM (96.7%). Conclusion: The high prevalence of herbal use and the reliance on non-healthcare information sources highlight the need for nursing interventions to provide evidence-based education and supervision on CAM use in diabetes management. Nurses play an important role in helping patients understand the potential benefits, risks, appropriate use, and possible interactions of CAM with conventional diabetes treatments. Ongoing monitoring and culturally appropriate education are therefore recommended to promote safe and informed CAM use within the community.