No. Homeowners insurance does not cover radon testing or mitigation. However, some health insurance plans now include radon-related screenings, and HSA/FSA accounts may reimburse mitigation under certain conditions.
More detail
Standard homeowners policies treat radon mitigation as a maintenance cost, not a covered loss. Mitigation does not arise from a "sudden and accidental" event in insurance terms; the radon was already present when the home was purchased. Some Ohio homeowners have successfully claimed mitigation costs under HSA or FSA accounts when a physician documents the radon level as a medical risk factor for an existing diagnosed respiratory condition; this requires documentation from the physician and the test result, and is not universal. Tax treatment: federal tax law historically does not allow deduction of radon mitigation as a medical expense unless the home modification is medically necessary for a diagnosed condition (high bar). Some states offer property-tax abatements for radon-resistant new construction; Ohio does not currently. Always check with a CPA before claiming any deduction. Cincinnati health-coverage reality: HSA and FSA reimbursement for radon mitigation is rare and requires a physician letter of medical necessity tied to a diagnosed respiratory condition. Most Cincinnati households cannot use these vehicles for mitigation. Federal tax deduction is similarly narrow. Mitigation is essentially a homeowner out-of-pocket expense. What you get back at sale time is documentation: EPA notes that saved test results and records of the fix can be a positive selling point.