Karen M. Schaller, PA, is a highly skilled Physician Assistant and Nurse Practitioner based in Bethlehem, Pennsylvania. With expertise in managing a wide range of conditions such as asthma, chronic nasal allergies, chronic sinusitis, and contact dermatitis, she is dedicated to providing exceptional care to her patients. Karen is especially knowledgeable in pediatrics and allergy & immunology, ensuring comprehensive health services for both children and adults....