Sharp Rees-Stealy Santee Laboratory occupies the first floor of the 86,000-square-foot Cuyamaca Street medical campus, processing diagnostic specimens for the multispecialty physicians practicing on floors two and three. Part of the Sharp Rees-Stealy Medical Group founded in 1923, the lab supports stat and routine orders from the same-floor walk-in urgent care center at Sharp Rees-Stealy Santee Urgent Care and from primary-care and specialist offices throughout the building. Test menus span complete blood counts, comprehensive metabolic panels, lipid profiles, thyroid function assays, hemoglobin A1C draws, urinalysis, and infectious-disease screenings. Results integrate into Sharp's system-wide electronic health record, giving ordering physicians across 22 Sharp Rees-Stealy locations real-time access to patient lab histories. Pediatric blood draws ordered by primary-care teams at Children's Primary Care Medical Group Santee on Cuyamaca Street are processed through the same clinical workflow, with butterfly-needle phlebotomy techniques available for small-vein pediatric patients. Highest-complexity panels include coagulation cascades (PT/INR, aPTT), tumor markers (PSA, CA-125), and 24-hour urine collections for creatinine clearance and cortisol quantification.