The medical examination for a marriage-based green card is conducted by an authorized physician to ensure the applicant meets health-related admissibility criteria. It includes vaccinations, disease screenings, mental health evaluations, and other public health assessments. The results are documented on Form I-693 and submitted to USCIS or the consular office. For adjustment of status, the examination is documented in Form I-693, and can be filed concurrently with Forms I-130 and I-485, or after an approved Form I-130. For consular processing, the examination is conducted while abroad.