The most common doctors who treat low testosterone are endocrinologists and urologists, though your primary care physician is typically the best starting point. Which specialist you ultimately need depends on your age, whether you want children, and what’s causing your levels to drop.
Start With Your Primary Care Doctor
Your primary care physician can order the initial blood work and, in many cases, manage treatment without referring you to a specialist at all. The first step is a total testosterone blood test, drawn in the early morning (ideally between 8 and 10 a.m.) when levels peak. A single low reading isn’t enough for a diagnosis. Both the American Urological Association and major insurance companies require at least two low morning testosterone measurements taken on separate days before treatment can begin.
If those results come back low, your doctor will likely order follow-up tests to figure out why. These can include pituitary hormone levels, a semen analysis, and sometimes pituitary imaging. A physical exam will also assess muscle mass, testicular size, and other signs of hormonal changes. Your doctor may also check your red blood cell counts before starting any treatment, since testosterone therapy can thicken the blood. Men over 40 will typically get a PSA test to screen for prostate issues first.
Endocrinologists: The Hormone Specialists
An endocrinologist specializes in the entire hormonal system, including the glands that regulate testosterone production. This makes them a natural fit when low testosterone stems from a pituitary problem, a thyroid disorder, or another hormonal imbalance rather than a straightforward testicular issue. They tend to look at the full hormonal picture, including free testosterone (the portion your body can actually use), not just your total number.
This distinction matters more than it might sound. Some patients find that urologists focus primarily on total testosterone and move on if that number looks acceptable, even when free testosterone is low. An endocrinologist is more likely to investigate the underlying hormonal chain, from brain signals to the testes, and identify where the breakdown is happening. If your primary care doctor suspects something beyond simple age-related decline, an endocrinology referral is the usual next step.
Urologists: Focused on Male Reproductive Health
Urologists specialize in the male reproductive and urinary systems, which includes the testes where testosterone is produced. Many urologists are comfortable prescribing and monitoring testosterone therapy, particularly when the cause is clearly testicular (from injury, infection, or aging). They’re also well-positioned to evaluate related symptoms like erectile dysfunction or changes in testicular size alongside low testosterone.
That said, not every urologist prioritizes testosterone management equally. Some treat it as secondary to their surgical focus on prostate and bladder conditions. If you see a urologist and feel your concerns about testosterone are being dismissed, asking for an endocrinology referral is reasonable.
If You Want Children, See a Reproductive Specialist
This is one of the most important distinctions in choosing the right doctor. Standard testosterone therapy suppresses sperm production, sometimes dramatically. The American Society for Reproductive Medicine is direct: men should avoid testosterone treatment until they are done having biological children.
If you have low testosterone and want to preserve your fertility, a male reproductive specialist (a urologist or endocrinologist with reproductive subspecialty training) can offer alternative approaches. There are medications that raise testosterone levels without shutting down sperm production the way direct testosterone replacement does. These work by stimulating your body’s own hormone production rather than replacing it from the outside.
If you’re already on testosterone and want to have children, stopping treatment is necessary, but recovery isn’t instant. It can take months for sperm counts to return to baseline. A reproductive specialist will monitor your hormone levels and semen analyses throughout that process. The American Urological Association guidelines specifically recommend that any man interested in fertility get a reproductive health evaluation before starting testosterone therapy.
Testosterone Treatment in Older Men
For men over 65, testosterone management involves additional screening that a geriatrician or experienced primary care doctor may handle alongside a specialist. Prostate monitoring becomes especially important, since testosterone raises PSA levels (the marker used in prostate cancer screening), which can complicate interpretation of those results.
Testosterone is generally considered contraindicated in men with a history of prostate cancer that has spread to the bone. For other prostate cancer histories, the evidence is mixed, and treatment decisions require careful discussion with your doctor. Experts also note that testosterone should be stopped if symptoms don’t improve after a trial period, which happens in roughly 10 to 20 percent of cases.
What Insurance Requires
Most insurers require prior authorization before covering testosterone therapy. The typical requirements mirror the diagnostic standards: you’ll need at least two confirmed low morning testosterone levels based on your lab’s reference range. Your doctor will need to document a clinical diagnosis of hypogonadism, not just a borderline number and some fatigue.
Whether your primary care doctor or a specialist prescribes the treatment generally doesn’t affect coverage, though some insurance plans may push for a specialist evaluation if your case is complex. If your first prior authorization is denied, having documentation from an endocrinologist or urologist can strengthen an appeal.
Choosing the Right Doctor for Your Situation
- Straightforward symptoms, no fertility concerns: Your primary care doctor can often handle diagnosis and treatment.
- Suspected hormonal or pituitary cause: An endocrinologist will investigate the underlying mechanism.
- Testicular issues or concurrent urinary/sexual symptoms: A urologist is a good fit.
- Wanting children now or in the future: A male reproductive specialist is essential before starting any treatment.
- Over 65 with multiple health conditions: A geriatrician working alongside an endocrinologist or urologist can coordinate care safely.
The most common path is starting with your primary care doctor for blood work, then getting a referral if the results and your specific situation call for specialized expertise. If you feel your concerns aren’t being taken seriously by one type of specialist, switching to another is a reasonable and common move.