SNAP Access for Medically Vulnerable Children Act of 2023 This bill expands benefits under the Supplemental Nutrition Assistance Program (SNAP) for households with children under the age of 18 who have chronic medical conditions. Specifically, the bill revises the excess medical expense deduction under SNAP to allow households to deduct allowable medical expenses in excess of $35 per month incurred for such children from their incomes in calculating SNAP benefits. Currently, the excess medical expense deduction under SNAP only allows qualified households with an elderly or disabled member to deduct such expenses.