TRT Eligibility: Who Qualifies for Testosterone Replacement Therapy?

Who May Be Eligible for TRT?

A man generally qualifies for testosterone replacement therapy only when two things are both true: he has symptoms or signs of testosterone deficiency, and blood tests taken on at least two separate mornings show testosterone below the normal range. Neither a single low result nor symptoms alone is enough under the American Urological Association (AUA) and Endocrine Society guidelines, and the FDA label for testosterone cypionate asks prescribers to confirm the diagnosis this way before starting treatment.

FDA-approved testosterone products are approved for men who lack or have low testosterone together with an associated medical condition, such as testicular failure or a pituitary or hypothalamic problem. The labels also state that safety and efficacy in "age-related hypogonadism" (low testosterone attributed only to aging) have not been established, and the FDA kept that limitation when it updated testosterone labels in 2025.

What Testosterone Level Do You Need to Qualify?

There is no single number written into law, and the two main US guidelines frame the cutoff differently. Ask any clinic which cutoff it uses and whether it looks at free testosterone as well as total testosterone.

• •AUA guideline: a total testosterone below 300 ng/dL is described as a reasonable cutoff in support of a diagnosis, based on two early-morning measurements.
• •Endocrine Society guideline: uses a harmonized reference range of 264 to 916 ng/dL for healthy, nonobese men aged 19 to 39, so 264 ng/dL is the lower limit of normal. It warns that a local lab's own lower limit may not accurately identify hypogonadism.
• •Endocrine Society guideline: repeat the total testosterone test on two separate mornings while fasting.
• •Endocrine Society guideline: when total testosterone is near the lower limit, or a condition changes SHBG (the protein that binds testosterone), measure free testosterone by equilibrium dialysis or estimate it with an accurate formula.

Symptoms That Count Toward a Diagnosis

Lab numbers are only half of the picture. MedlinePlus lists low sex drive, erectile dysfunction, infertility, enlarged breasts, less face or body hair, thinning bones or unexplained anemia, and loss of muscle mass as possible symptoms of low testosterone in men. Many of these also have other causes, which is why a clinician should look for those causes before treating. The AUA summary notes that symptom questionnaires alone are not recommended for diagnosis.

Primary vs. Secondary Hypogonadism

Once low testosterone is confirmed, a clinician usually checks LH and FSH, the pituitary hormones that signal the testes, to find out where the problem starts. The answer can change which treatment makes sense.

• •Primary hypogonadism: the testes do not make enough testosterone. The FDA label lists causes such as undescended testes (cryptorchidism), bilateral torsion, orchitis, Klinefelter syndrome, orchiectomy, chemotherapy, or toxic damage from alcohol or heavy metals. LH and FSH are usually above the normal range.
• •Secondary (hypogonadotropic) hypogonadism: the pituitary or hypothalamus does not send enough signal to the testes, for example after tumors, trauma or radiation. Testosterone is low while LH and FSH are in the normal or low range. Some men in this group, especially those who want to keep fertility, discuss options with their clinician that stimulate the body's own production instead of replacing testosterone.

Who May Not Be a Candidate for TRT

The Endocrine Society recommends against starting testosterone in men with any of the following, and the FDA label lists breast cancer and known or suspected prostate cancer as contraindications. Your clinician screens for these before prescribing.

• •Breast or prostate cancer, or a palpable prostate nodule or induration
• •PSA above 4 ng/mL, or above 3 ng/mL in men at high risk of prostate cancer, without further urologic evaluation
• •Hematocrit above 48% (above 50% for men living at high altitude)
• •Untreated severe obstructive sleep apnea
• •Severe lower urinary tract symptoms
• •Uncontrolled heart failure, a heart attack or stroke within the last 6 months, or thrombophilia (a tendency to form blood clots)
• •Planning to father a child in the near term: the FDA label warns that testosterone may cause azoospermia (no sperm in the semen), and the AUA summary advises a fertility evaluation before TRT

Heart risk is part of the discussion, not an automatic exclusion. In February 2025 the FDA asked makers of all testosterone products to remove the boxed warning language about increased cardiovascular risk after the TRAVERSE trial in men with hypogonadism found no increase in adverse cardiovascular outcomes. At the same time, the FDA required a blood pressure warning for every testosterone product, because required ambulatory blood pressure studies confirmed that testosterone raises blood pressure across the class.

Age and TRT Eligibility

No guideline sets an upper or lower age limit, but age changes the conversation. MedlinePlus notes that it is normal for testosterone to decrease with age. For men 65 and older with low testosterone, the Endocrine Society suggests against routinely prescribing testosterone to everyone and instead suggests an individual decision, after a discussion of risks and benefits, for men with symptoms such as low libido or unexplained anemia and consistently low morning levels. For younger men, the main issue is fertility, because testosterone therapy can suppress sperm production.

How Online TRT Clinics Evaluate Eligibility

Testosterone is a Schedule III controlled substance (the FDA label marks it CIII), so online clinics must follow federal and state controlled-substance rules. Under the DEA and HHS temporary flexibilities, a DEA-registered clinician may prescribe Schedule II to V drugs by telemedicine without an initial in-person exam through December 31, 2026, if the prescription meets federal and state requirements. Those rules may change after that date, and some states add their own requirements, so the clinic should tell you whether an in-person visit is needed where you live.

1. 1.A health questionnaire covering symptoms, medications, fertility plans, sleep apnea, and heart, prostate and blood clot history.
2. 2.At least two morning total testosterone tests on separate days, plus free testosterone when total testosterone is borderline.
3. 3.Follow-up labs to find the cause and check safety, which per the Endocrine Society and the FDA label typically include LH and FSH (to tell primary from secondary hypogonadism), hematocrit, and PSA.
4. 4.A licensed clinician reviewing your results and explaining why treatment is or is not appropriate, including options other than testosterone.
5. 5.A monitoring plan: the FDA label calls for checking hematocrit periodically during treatment and evaluating men for prostate cancer, including PSA, before starting and during treatment.

Quick Answers

• •What level of testosterone qualifies for TRT? The AUA uses total testosterone below 300 ng/dL as a reasonable cutoff. The Endocrine Society uses a lower limit of normal of 264 ng/dL. Either way, the result must be low on two separate morning tests and paired with symptoms.
• •Can I qualify with normal testosterone and symptoms? Generally not under these guidelines. A clinician may recheck, measure free testosterone, or look for other causes such as sleep problems, depression or medication effects.
• •Does one low test qualify me? No. Both guidelines and the FDA label call for confirmation on a second day.
• •Can I get TRT if I want children soon? The Endocrine Society recommends against testosterone therapy for men planning fertility in the near term. Ask a clinician about alternatives.