Dr. Patrick S. O'Hollaren is a board-certified pediatric urologist in Portland, OR. Dr. O'Hollaren provides care for boys and girls and treats all aspects of the genital and urinary systems. He works closely with all of the pediatric subspecialists at Providence Pediatric Specialties to ensure coordinated care for children with genitourinary concerns. Dr. O’Hollaren knows a visit to the doctor’s office can be scary for young kids, so his office is full of clocks, superhero posters and toys.