69145 would only be appropriate if the cyst was in the EAC. If the cyst was of the ear lobe or other parts of the external ear then you would need to look at the following procedures to see which is the most appropriate.
10060 Incision and drainage of abscess (eg, carbuncle, suppurative hidradenitis, cutaneous or subcutaneous abscess, cyst, furuncle, or paronychia); simple or single
10080 Incision and drainage of pilonidal cyst; simple
11440 Excision, other benign lesion including margins, except skin tag (unless listed elsewhere), face, ears, eyelids, nose, lips, mucous membrane; excised diameter 0.5 cm or less