California Business And Professions Code Section 3365.5

Whenever any of the following conditions are found to exist either from observations by the licensee or on the basis of information furnished by the prospective hearing aid user, a licensee shall, prior to fitting or selling a hearing aid to any individual, suggest to that individual in writing that his best interests would be served if he would consult a licensed physician specializing in diseases of the ear or if no such licensed physician is available in the community then to a duly licensed physician: (1) Visible congenital or traumatic deformity of the ear. (2) History of, or active drainage from the ear within the previous 90 days. (3) History of sudden or rapidly progressive hearing loss within the previous 90 days. (4) Acute or chronic dizziness. (5) Unilateral hearing loss of sudden or recent onset within the previous 90 days. (6) Significant air-bone gap (when generally acceptable standards have been established). No such referral for medical opinion need be made by any licensee in the instance of replacement only of a hearing aid which has been lost or damaged beyond repair within one year of the date of purchase. A copy of the written recommendation shall be retained by the licensee for the period provided for in Section 3366. A person receiving the written recommendation who elects to purchase a hearing aid shall sign a receipt for the same, and the receipt shall be kept with the other papers retained by the licensee for the period provided for in Section 3366. Nothing in this section required to be performed by a licensee shall mean that the licensee is engaged in the diagnosis of illness or the practice of medicine or any other activity prohibited by the provisions of this code.