What are the two main categories of medical coding used in billing?

The two main categories of medical coding used in billing are ICD and CPT.

ICD, which stands for the International Classification of Diseases, is utilized primarily for diagnosing and categorizing diseases, codes, and health-related issues. This coding system is essential for health statistics, including tracking diseases and conditions for insurance reimbursement and public health reporting.

CPT, or Current Procedural Terminology, is used to code medical, surgical, and diagnostic services and procedures. This coding system facilitates the billing process and ensures that healthcare providers are reimbursed for the services they perform. Together, ICD and CPT codes provide a comprehensive framework for billing and documenting patient care in healthcare settings.

The other options, while relevant to healthcare billing, do not reflect the fundamental categories of medical coding in the same way. CMS and AMA refer to organizations rather than coding systems, NPI refers to a unique identifier for healthcare providers, and DRG and APC are payment systems that utilize coding but do not represent the primary coding frameworks themselves.