Medical coders in pediatrics use several coding systems, including: - [ICD-10-CM](#) (International Classification of Diseases, 10th Revision, Clinical Modification): Used for diagnosing conditions. - [CPT](#) (Current Procedural Terminology): Used for documenting medical procedures. - [HCPCS](#) (Healthcare Common Procedure Coding System): Used for various services not covered by CPT, such as ambulance services and durable medical equipment.