Which coding system is primarily used for diagnoses in the United States?

The International Classification of Diseases (ICD) is primarily used for diagnosing conditions in the United States. This coding system provides a standardized way to capture and report diseases, symptoms, abnormal findings, and other health-related issues. By using ICD codes, healthcare providers can ensure that diagnoses are documented consistently and accurately across the healthcare system. These codes are also essential for billing and insurance purposes, as they help to justify the need for medical services based on patients’ diagnosed conditions.

ICD has been widely adopted in the U.S. and other countries in various versions, with the most current being ICD-10. This system allows for a detailed classification of diseases and health issues, enhancing the ability to analyze health trends and monitor public health initiatives.

The other coding systems mentioned have different primary functions. Current Procedural Terminology (CPT) is mainly used for coding procedures and services performed by healthcare professionals rather than diagnoses. The Healthcare Common Procedure Coding System (HCPCS) includes codes for services, supplies, and equipment not covered by CPT, typically related to Medicare and Medicaid. Allergen Codes are quite specialized and pertain to specific testing and treatment of allergies, not general diagnoses. Therefore, ICD is the correct answer for the primary coding system for diagnoses in the United