Tex. Ins. Code § 544.453

An entity that offers a health benefit plan or an annuity or life insurance policy or contract may not use the fact that a person has been exposed to asbestos fibers or silica or has filed a claim governed by Chapter 90, Civil Practice and Remedies Code, to reject, deny, limit, cancel, refuse to renew, increase the premiums for, or otherwise adversely affect the person's eligibility for or coverage under the policy or contract.