Elevated IGF-1 212 (53-191)-no signs of acromegaly; endo won't retest-wants an MRI; have POTS/dysautonomia; do I need the MRI? Tired of testing

No. Normal IGF-1 level for your age is 132-333 ng/mL ( 6.6 to 33 nmol/L). As you can see a level of 212 ng/mL is not elevated, but rather above the mean. It could be better if it is closer to 333 ( the upper quartile ).