Thank you for participating in the National Disease and
For more than 40 years, the National Disease and Therapeutic
Index (NDTI) has tracked epidemiological trends and treatment patterns
continually among private practice physicians in the United States. A panel,
comprised of more than 4,000 office based physicians, reports quarterly on all patient
contacts occurring during a single forty-eight hour period. For each patient
contact, the physician records basic patient demographics, diagnosis, and
related therapies (Rx, OTC, Vitamins).