PATIENT PORTAL; PATIENT MONITORING; PATIENT & PROVIDER COVID-19 RESOURCES ... REQUEST AN APPOINTMENT. PATIENT & PROVIDER COVID-19 RESOURCES; Cullen B. Rivers Pulmonary Associates of Richmond 2020-03-02T09:23:42-05:00. CULLEN B. RIVERS, MD. CULLEN B. RIVERS, MD ... high-quality sleep medicine. The APCs that work with Dr. Rivers in the Santa Rosa ....