The 90460 code is used when a physician is present and performs face-to-face counseling to the caregiver or parent. This code can only be used for patients through age 18. Code 90471 is used when the drug is administrated by a medical assistant or nurse and the patient does not see the physician at all. This code would also be used for any patient 19 years of age or older regardless if physician is present and does face-to-face counseling.