A TSH level of 150 indicates severe thyroid deficiency, while normal TSH ranges can still fluctuate and are not sole indicators of hypothyroidism.

“oh my gosh if you have a TSH of 150 which I've seen at some point but you what is that associated with symptoms her pulse was like 30 she practically near-death and and what is that a if the range is 0 to 5 on a TSH 150 is literally like the brain screaming like please give her thyroid from when she's about to die please please please please please right so we were like oh my gosh how are you living she said that's what my doctor said I'm like exactly so but a TSH within that range can fluctuate again so that's why it's not the proper assessment”