About Us We Are the Pain Management Specialists in Texas Pain Specialists of America is an Interventional Pain Management Practice in Texas with over 15 locations along the I35 corridor, from Waco to San Antonio. At PSA, you’ll find nationally known thought leaders and educators focused on excellent patient-centric care and outcomes. Their physician leaders have been trained at the nation’s most prestigious medical centers in the country, like Harvard Medical School and the Cleveland Clinic. At PSA, you can expect the most advanced therapies and diagnostics, identifying and treating the generator of your pain.