Aetna Dental P.O. Box 14597 Lexington, KY 40512-4597. California only: Aetna Dental P.O. Box 10462 Van Nuys, CA 91410 . Want to become a participating dentist? Call our National Dentist Line at 1-800-451-7715 or visit Information about Aetna Dental Networks. Aetna website. You can request more information 24 hours a day at www.aetna.com ....