6A4 Hypothermia - Physiological Systems ICD-10-PCS
The 6A4 code range contains 4 ICD-10-PCS codes for Hypothermia procedures on the physiological systems. 3 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Hypothermia: Extracorporeal lowering of body temperature.
Codes in the 6A4 Range 4 codes · 3 billable
About the 6A4 Code Range
The ICD-10-PCS root operation Hypothermia (code 6A4) refers to the deliberate reduction of body temperature as part of an extracorporeal or systemic therapy. This procedure is applied to physiological systems to manage or treat specific clinical conditions by lowering the patient's core temperature.
Within the Extracorporeal or Systemic Therapies section, the use of Hypothermia serves to protect organs and tissues, often during critical care or surgical interventions. The provided codes specify whether a single or multiple instances of hypothermia therapy are administered: code 6A4Z0ZZ indicates a Single hypothermia treatment, while code 6A4Z1ZZ denotes Multiple therapies. These distinctions help accurately capture the treatment duration and intensity as part of the patient's procedural record, ensuring precise documentation of systemic temperature modulation therapies.
Questions About This Page
How many billable codes are in the 6A4 range?
Of the 4 codes in this range, 3 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the 6A4 range classify?
The range classifies Hypothermia procedures, extracorporeal lowering of body temperature, performed on the physiological systems. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
