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Endocrine / Hormones

Luteinizing Hormone (LH)

Also known as: lutropin, interstitial cell stimulating hormone, ICSH

CPT 82565Quest 1759LabCorp 322000
When to Seek Prompt Care

No common urgent flag from this test alone. However, if you experience sudden, severe symptoms like unexplained fatigue, significant weight changes, or severe pain, seek immediate medical attention.

What It Measures

This test checks how much Luteinizing Hormone (LH) is in your blood or pee. LH is a chemical signal. Your pituitary gland makes it. LH is very important for growing up sexually and for having babies.

Why It's Ordered

Your doctor orders this test to help figure out problems with getting pregnant. It also helps with periods that are not regular. It can also help with issues during puberty. This test can also find problems with your pituitary gland. It can check your ovaries or testicles too.

Reference Range

LH levels vary greatly depending on your age, sex, and where you are in your menstrual cycle if you are a woman. Reference ranges are approximate and can differ between laboratories. Your doctor will interpret your results based on your individual situation.

Clinical Reference

Quest: 1759
LabCorp: 322000
CPT: 82565
ICD-10: N18.9, N18.3, N18.4, I10, E11.9

Medicare covers for kidney function evaluation

Educational purposes only — This information is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your lab results with your healthcare provider.