Complex sentence: In the United States the DSM serves as a universal authority for the diagnosis of psychiatric disorders, and treatment recommendations, as well as payment by health care providers, are often determined by DSM classifications, so the appearance of a new version has significant practical importance.
Split into simpler sentences: In the United States the DSM serves as a universal authority for the diagnosis of psychiatric disorders. Treatment recommendations, as well as payment by health care providers, are often determined by DSM classifications, so the appearance of a new version has significant practical importance.