Who was responsible for developing the International Classification of Diseases (ICD)?

The International Classification of Diseases (ICD) was developed by the World Health Organization (WHO). This classification system is essential for the international standardization of medical diagnoses and health conditions. WHO has been responsible for developing and maintaining the ICD to facilitate the collection and comparison of health data across different countries and settings.

The ICD provides a common language for reporting and monitoring diseases and health conditions, which is critical for health policy and resource allocation. Its adoption worldwide helps ensure that health statistics are consistent and reliable.

In contrast, the other organizations listed have different primary roles in the healthcare and medical fields. For instance, the Centers for Medicare & Medicaid Services (CMS) primarily focuses on administering the nation's major healthcare programs, while the Department of Health and Human Services (DHHS) oversees health and welfare programs in the U.S. The American Medical Association (AMA) is a professional organization that advocates for physicians and healthcare issues but does not develop classifications like the ICD. Thus, the correct answer reflects WHO's pivotal role in establishing a globally recognized system for classifying diseases.