Derrington Orthopedics Interventional Sports and Spine in Carlsbad brings Regenexx regenerative therapy to Van Allen Way, ranking as the third-highest-volume Regenexx clinic in the United States as of 2023. The practice concentrates on non-surgical platelet-rich plasma and bone-marrow-concentrate injections guided by real-time musculoskeletal ultrasound, a diagnostic-plus-treatment workflow that parallels the manual rehabilitation protocols at Longevity Physical Therapy - Bressi Ranch. Founded by a Kansas City University-trained osteopathic physician, the clinic added a dual-fellowship provider in 2025 whose credentials span emergency medicine and sports medicine board certifications through the Centeno-Schultz interventional orthobiologics program. Image-guided PRP and stem-cell procedures address partial rotator-cuff tears, meniscal injuries, and lumbar disc herniations as non-surgical alternatives, filling a regenerative-medicine niche alongside the spinal-adjustment services at La Costa Chiropractic & Wellness in the La Costa corridor. Fluoroscopy-assisted intradiscal platelet lysate injections target annular tears at the L4–L5 and L5–S1 levels, delivering concentrated growth-factor solutions directly into damaged disc tissue under live imaging.