An implantable cardioverter-defibrillator, also called an ICD, is a small battery-powered device placed in the chest. It detects and stops irregular heartbeats, also called arrhythmias. An ICD constantly checks the heartbeat. It delivers electric shocks, when needed, to restore a regular heartbeat. Free ICD-10-CM code lookup with plain-language explanations, coding guidance, denial risk alerts, and documentation requirements. Built for medical coders and healthcare providers. The International Classification of Diseases (ICD) is the globally authoritative medical classification and terminology used in epidemiology, health management, clinical diagnosis, and health information management, resource allocation, clinican recording, decision support and health financing. ICD-10-CM Range M00-M99 Diseases of the musculoskeletal system and connective tissue M00-M02 Infectious arthropathies M04-M04 Autoinflammatory syndromes M05-M14 Inflammatory polyarthropathies M15-M19 Osteoarthritis M20-M25 Other joint disorders M26-M27 Dentofacial anomalies [including maloccl. M30-M36 Systemic connective tissue disorders What is an implantable cardioverter defibrillator? An ICD is a battery-powered device placed under the skin that keeps track of your heart rate. Thin wires connect the ICD to your heart. If an abnormal heart rhythm is detected, the device will deliver an electric shock to restore a normal heartbeat. ICD-10-CM (the International Classification of Diseases, Tenth Revision, Clinical Modification) is a standardized system used to code diseases and medical conditions (morbidity) data. ICD List is a free reference for the two code sets that run U.S. medical coding and billing: ICD-10-CM for diagnoses and ICD-10-PCS for hospital inpatient procedures. Look up any of the 74,719 billable ICD-10-CM diagnosis codes for fiscal year 2026 by code, condition, synonym, or clinical abbreviation. Smart Search matches codes with or without the decimal point and understands the terms coders actually type. ICD serves a broad range of uses globally and provides critical knowledge on the extent, causes and consequences of human disease and death worldwide via data that is reported and coded with the ICD. ICD10Data.com is a free reference website designed for the fast lookup of all current American ICD-10-CM (diagnosis) and ICD-10-PCS (procedure) medical billing codes.