44North

Talk to your PCP about this normal TSH level the surgeon's office is talking about. Have you had any recent labs drawn? Maybe they checked your level then, but it seems like you would know since you're pretty knowledgeable of your levels. As far as the colonoscopy/bleeding, I agree with what you're saying and wouldn't feel comfortable with going through surgery without that issue being figured out first. Again, I think you should talk to your PCP and see what they have to say. Good luck!

I don't know that not having your thyroid levels at optimal level is a contraindication for WLS. I have Hashimoto's Thyroiditis and get my levels tested every 3 months and medication adjusted as necessary. This was the case pre-surgery and is still the case post-surgery.
I suggest you talk to your clinicians (PCP, Endocrinologist, Surgeon) about this and find out what their recommendation is for you with regards to the timing of your surgery. We're not the right people to make that determination. Good luck!