Medical History from Pilot Applicant Seeking Airman Med Certification
Item 18: Detailed Sub Items 18a - 18y FAA Form 8500-8
Apr 2014
Abbreviated Briefing:
Pilots must select either the or radio button for each of the items a. thru y. All items marked “yes” require a comment. (Mandatory for AME prior to issuance)
Applicants must provide an explanation for all medical history items where the Yes radio button was selected in the Applicant Explanation box provided for each applicable item. If the condition was reported on a previous application and there has been no change in your condition, you may note "Previously Reported, No Change" by clicking on the button.
Below is an expanded view of Item 18 and it's many sub-questions.
Guidance is compiled and interpreted by professional pilots and physicians at FlightPhysical.com from the 2014 AME Guide pages 29-40, FAA and FDA web data (www.FAA.gov & www.FDA.gov), instructions specified in the Aeronautical Information Manual, Federal Air Surgeon Bulletins from 1999-2015, and 14 CFR Part 61 and Part 67 (the FARs).
Commentary:
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The FAA MedXPress Application will require you to provide comments or explanations for all items 18.a. through 18.y. The button will come active as you click on any specific medical problem in your history. Once you have done this for the FAA in the past, you will not need to repeat it. They have a button which stands for PREVIOUSLY REPORTED, NO CHANGE, so you will not have to repeat yourself for old conditions or health issues unless there have been any changes. Below is a sample screenshot:

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