Integrated care delivery is at the core of patient-centered medical homes (PCMHs). The extent of integration of dental services in PCMHs for adults is largely unknown. We first identified dental-medical integrating processes from the literature and then conducted a scoping review using PRISMA guidelines to evaluate their implementation among PCMHs. Processes were categorized into workforce, information-sharing, evidence-based care, and measuring and monitoring. After screening, 16 articles describing 21 PCMHs fulfilled the inclusion criteria. Overall, the implementation of integrating processes was limited. Less than half of the PCMHs reported processes for information exchange across medical and dental teams, referral tracking, and standardized protocols for oral health assessments by medical providers. Results highlight significant gaps in current implementation of adult dental integration in PCMHs, despite an increasing policy-level recognition of and support for dental-medical integration in primary care. Understanding and addressing associated barriers is important to achieve comprehensive patient-centered primary care.