#1761 ·
Hey everyone, I have two quick questions if anyone happens to know the answer. I have a referral for T3, T4, and TSH testing issued on December 7, 2016—does that still hold up? I was reading online that under the new rules, referrals are only valid for 90 days. Second question: can I just walk into the Mayo Clinic in Washington, D.C. and get this done without an appointment?