Offering quick access to the pathological conditions most commonly seen in the physician's office, this portable text/reference is ideal for administrative and clinical medical assistants who have responsibilities such as billing, coding, telephone screening, taking patient examinations, understanding diagnostic and treatment procedures, and putting together patient education programs. Reflecting the latest changes in the field, this fourth edition describes over 500 conditions and disorders, and includes ICD-9-CM codes for each disease entry. A companion website enhances understanding with exercises, patient screening and patient teaching critical thinking questions, A&P web links, and certification exam review questions.