Dermatology appointment for 10 minutesPlease note that you can only book an appointment if you have a referral letter from your doctor or if you have seen Dr. Chang in the last year. If you have seen Dr. Chang more than one year ago, then you will need a new referral letter from your doctor to book an appt. If you are not sure when you last saw Dr. Chang, you can email us at email@example.com to ask. All patients should bring the referral letter at the time of their visit if they have this letter. If the letter has been faxed to our office you can book now. You do not need to confirm with us that we have the letter. Please only book one green time slot per patient. Have a great day and look forward to seeing you!