Getting prescribed testosterone replacement therapy (TRT) requires documented low testosterone levels confirmed through blood work, along with symptoms that affect your quality of life. The process typically involves your primary care doctor or a specialist, at least two morning blood draws on separate days, and a review of your medical history to rule out conditions that make TRT unsafe. Here’s what to expect at each step.
Start With the Right Doctor
More than half of all testosterone prescriptions in the United States are written by primary care physicians, so you don’t necessarily need a specialist. Your regular doctor can order the initial blood work, evaluate your symptoms, and start treatment if you qualify. That said, endocrinologists and urologists handle more complex cases, and your doctor may refer you to one if your situation involves fertility concerns, a history of prostate issues, or an unclear cause of low testosterone.
Men’s health clinics and telehealth platforms that specialize in hormone therapy are another option. These tend to move faster through the evaluation process, though they may not accept insurance. Whichever route you choose, the diagnostic steps are the same.
What the Blood Work Involves
The single most important requirement is proving that your testosterone is genuinely low, not just borderline on one test. Most guidelines and insurance policies require at least two separate morning blood draws showing testosterone levels below the normal range. Morning matters because testosterone peaks early in the day and drops through the afternoon, so a late-day test can give a misleadingly low reading.
Insurance companies like Aetna explicitly require two confirmed low morning testosterone levels before they’ll cover treatment. The normal reference range varies slightly by lab, but levels consistently below roughly 300 ng/dL are the threshold most clinicians use to consider a diagnosis of testosterone deficiency.
Beyond total testosterone, your doctor will likely check several other markers. These include a complete blood count (to measure your red blood cell concentration), prostate-specific antigen (PSA) to screen for prostate issues, and sometimes prolactin and thyroid hormones to rule out other causes of your symptoms. If your red blood cell concentration is already elevated above 50%, your doctor will want to investigate why before starting TRT, since testosterone can push it higher.
Symptoms That Support a Prescription
Low numbers alone aren’t always enough. Doctors look for a combination of low levels and symptoms that point to testosterone deficiency. The symptoms that carry the most weight include:
- Low sex drive or erectile difficulties that aren’t explained by other conditions
- Persistent fatigue that doesn’t improve with better sleep
- Loss of muscle mass or strength despite consistent activity
- Increased body fat, particularly around the midsection
- Mood changes such as irritability, depression, or difficulty concentrating
- Decreased bone density found on a scan
If your blood work comes back low but you feel fine, many doctors will take a watch-and-wait approach rather than immediately prescribing treatment. Conversely, if you have textbook symptoms but your levels are in the normal range, TRT isn’t typically appropriate.
Conditions That Can Disqualify You
Several medical situations make TRT off the table, at least temporarily. The FDA lists known or suspected prostate cancer and male breast cancer as absolute contraindications. If your PSA is above 4 ng/mL or your doctor finds anything unusual during a prostate exam, you’ll need a urology evaluation before TRT is even considered.
If you’ve had a heart attack, stroke, or other cardiovascular event, guidelines recommend waiting three to six months before starting testosterone. Men who are actively trying to conceive should also avoid TRT entirely, because external testosterone suppresses sperm production and can cause temporary infertility. If low testosterone and fertility are both concerns, your doctor can discuss alternative treatments that stimulate your body’s own production instead.
Choosing a Delivery Method
Once you qualify, you and your doctor will pick a delivery method based on your preferences, lifestyle, and insurance coverage. The options vary widely in how often you use them and how they fit into your routine.
Injections are the most common and typically the cheapest option. Testosterone cypionate or enanthate is injected into muscle every one to two weeks. Many men learn to self-inject at home. A longer-acting injectable option requires less frequent dosing (roughly every 10 weeks after the initial loading phase) but must be administered in a clinic.
Topical gels are applied daily to the shoulders, upper arms, or abdomen. They maintain steadier day-to-day levels than injections but require care to avoid skin-to-skin transfer to partners or children. Several gel formulations exist at different concentrations.
Patches are worn on the skin and changed daily. They deliver a consistent dose but can cause skin irritation at the application site.
Pellets are implanted under the skin (usually in the hip area) during a quick office procedure every three to four months. They’re convenient once placed but require a minor procedure each time.
Nasal gel is applied inside the nostrils three times a day. It avoids the skin-transfer concerns of topical gels but requires the most frequent dosing of any option.
What Happens After You Start
TRT isn’t a one-time prescription. It requires ongoing monitoring to make sure the treatment is working and not causing problems. The American Urological Association recommends checking your total testosterone and red blood cell levels every 6 to 12 months. Your doctor may check more frequently in the first year as doses are adjusted.
Red blood cell concentration is the most closely watched safety marker. Testosterone stimulates red blood cell production, and if levels climb too high (above 54%), it thickens your blood and raises the risk of clotting. If this happens, your doctor may lower your dose, switch your delivery method, or temporarily pause treatment. PSA is also monitored periodically. A jump of more than 1.4 ng/mL within 12 months or an abnormal prostate exam triggers a urology referral.
Most men notice improvements in energy and libido within the first few weeks, though full effects on body composition and mood can take three to six months. If your levels normalize but symptoms don’t improve, your doctor may reassess whether testosterone deficiency was actually the underlying issue.
Navigating Insurance Coverage
Insurance coverage for TRT varies, but most major insurers follow a similar pattern. They require documented proof of at least two low morning testosterone levels, a clinical diagnosis of hypogonadism, and sometimes evidence that symptoms are present. Generic testosterone cypionate injections are the most reliably covered option, often costing $30 to $50 per month even without insurance. Brand-name gels, patches, and newer formulations can run several hundred dollars monthly and may require prior authorization or step therapy (trying a cheaper option first).
If your insurance denies coverage, your doctor’s office can often submit an appeal with supporting lab work and clinical notes. Some men who face insurance hurdles opt to pay out of pocket for generic injectables, which remain affordable compared to most brand-name formulations.