ICD-10 Code E86.1 – Hypovolemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E86.1 – Hypovolemia
What it is
Hypovolemia means a reduced circulating blood volume. Use this code when documentation clearly states volume depletion or low intravascular volume.
Clinical signs
Clinical features may include dizziness, weakness, thirst, orthostatic symptoms, or signs of poor perfusion. Clinical features vary; refer to documentation.
When to use this code
Use E86.1 when the provider documents hypovolemia, volume depletion, or reduced blood volume as the diagnosis. It may also fit when the record links symptoms or exam findings to hypovolemia. If the chart only suggests dehydration, check documentation before coding.
Do not use for
Do not use this code for general dehydration unless the provider specifically documents hypovolemia. Avoid it when the record describes shock, hemorrhage, or another primary cause without confirming low circulating volume.
Coding tip
Code the documented condition exactly and query when the note uses vague terms such as “volume loss” or “dehydration” without clarification.