20103 reads "The physician explores a penetrating wound in the operating room, such a gunshot or stab wound, to help identify damaged structures. Nerve, organ and blood vessel integrity is assessed." 20103 is most likely incorrect since your doc was just looking for a foreign body.
I would look at 12001-12007 (depending upon size of the laceration. This code reads "The physician sutures superficial lacerations of the scalp, neck, axillae, external genitalia, trunk or extremities. A local anesthetic is injected around the laceration and the wound is cleansed, explored and often irrigated with a saline solution."