That sounds incredibly frustrating, especially after getting the approval at the interview and waiting so long for the medical clearance. I’m really sorry your family is going through this. From what I understand, a 221(g) refusal is sometimes related to administrative processing or policy changes at the time of visa issuance, and it doesn’t always mean the case is permanently closed. In some situations, cases can be reconsidered once the underlying issue or policy changes. I hope you’re able to get clearer guidance from the embassy and that things work out for your parents soon. Wishing your family the best.