K.P.
What you are seeking-out is marriage counseling, not disability-related therapy. There is a difference in the billing code. Unless either of you is diagnosed with a psychiatric condition as part of the counseling, you shouldn't have anything to worry about. Your provider will provide non-specific therapy notes to the insurance company which will indicate that you are there for short-term topical intervention, not on-going psychiatric management.
Good for you for being open to learning new communication strategies!