Board-certified in physical medicine and rehabilitation, Dr. Stephen Derrington operates Derrington Orthopedics on Van Allen Way in Carlsbad, specializing in non-surgical regenerative orthopedic care. Patients completing spinal manipulation cycles at Phillips Chiropractic who plateau on conservative manual care are among those transitioning to the clinic's orthobiologic injection protocols. A Kansas City University graduate and Regenexx-credentialed physician since 2016, Dr. Derrington has performed more Regenexx regenerative procedures than any other clinic in California and ranked third nationally in 2023 case volume. Complex joint preservation cases often overlap with the surgical orthopedic evaluation pathways at Orthopaedic Specialists of North County, where patients weighing operative versus non-operative options seek comparative consultations. The practice deploys fluoroscopy-guided and ultrasound-guided platelet-rich plasma injections alongside bone marrow concentrate procedures targeting partial rotator cuff tears, meniscal degeneration, and lumbar facet arthropathy.