This document addresses idiopathic environmental illness (IEI) – also called clinical ecology or multiple chemical sensitivities (MCS). IEI is described as an acquired sensitivity to numerous chemically unrelated environmental substances resulting in a wide variety of non-specific symptoms such that an objective case definition is not possible.

Note: For additional information, please see the following:

• LAB.00027 Selected Blood, Serum and Cellular Allergy and Toxicity Tests

Position Statement

Investigational and Not Medically Necessary:

Laboratory tests designed to affirm the diagnosis of idiopathic environmental illness are considered investigational and not medically necessary.

Treatment of idiopathic environmental illness with avoidance therapy, elimination diets, neutralizing therapy of chemical and food extracts, or medical therapy is considered investigational and not medically necessary.