What is the highest a TSH level can be?
TSH levels typically fall between 0.4 and 4.0 milliunits per liter (mU/L), according to the American Thyroid Association. Ranges between laboratories will vary with the upper limit generally being between 4 to 5. If your level is higher than this, chances are you have an underactive thyroid.
What are very high levels of TSH?
A normal range for TSH in most laboratories is 0.4 milliunits per liter (mU/L) to 4.0 mU/L. If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism. Your doctor may also order a T4 test.
What happens if TSH is too high?
High TSH levels indicate hypothyroidism. People develop hypothyroidism when their thyroid produces low levels of hormones. When the thyroid gland does not produce enough hormones, the pituitary gland produces more TSH to compensate. Symptoms of hypothyroidism include: fatigue.
Is TSH 5.10 normal?
A person with a normal functioning thyroid should have a blood TSH reading within the normal reference range, which commonly goes up to 4.5 milli-international units per liter (mIU/L) or 5.0 mIU/L .
Is 10 a high TSH level?
Subclinical hypothyroidism is defined as a thyroid stimulating hormone (TSH) level of 4.6 to 10 mIU/L. A normal TSH level is 0.4 to 4.0 and full-blown hypothyroidism is 10 or higher.
Is TSH 15 high?
Moderately elevated TSH levels (between 10 and 15 mU/L): Each year, 20% of the participants in this group developed hypothyroidism with symptoms. Highly elevated TSH levels (over 15 mU/L): Each year, 73% of the participants in this group developed overt hypothyroidism.
Is TSH of 9 high?
What TSH is considered severe hypothyroidism?
TSH > 4.0/mU/L with a low T4 level indicates hypothyroidism. If your TSH is > 4.0 mU/L and your T4 level is normal, this may prompt your physician to test your serum anti-thyroid peroxidase (anti-TPO) antibodies.