American Pain Institute
About American Pain Institute
American Pain Institute in Portsmouth, NH, specializes in comprehensive pain management with a focus on regenerative orthopedics for chronic joint conditions. The practice offers minimally invasive, non-surgical treatments including ultrasound-guided stem cell injections and platelet-rich plasma therapy to stimulate tissue regeneration and provide lasting pain relief without surgery. Under the leadership of Dr. Joshua Greenspan, MD—a board-certified anesthesiologist and pain management specialist with extensive experience at major institutions—the center delivers evidence-based care using advanced techniques like radiofrequency ablation, hydrodiscectomy, and spinal cord stimulation. American Pain Institute serves patients across the Seacoast Region, providing personalized treatments for arthritis, tendonitis, and neuropathic pain while emphasizing patient-centered care and natural healing.