Pathology
TRT pathology test in Australia: the full panel explained
Before any Australian doctor prescribes testosterone, they need pathology. This is the exact panel, why each marker is on it, which labs run it, and what it costs.
Quick facts
- Who can order it
- Any GP — no specialist needed
- Collection time
- 7:00am – 10:00am
- Fasting
- 8–12 hours
- Samples for diagnosis
- 2, on separate mornings
- Cost with referral
- $0 (bulk billed)
- Monitoring once on TRT
- 3 months, 6 months, then 6–12 monthly
Indicative third-party costs (pathology, doctor and pharmacy fees charged by those providers), not prices charged by Low T Check. Confirm with the provider.
The diagnostic panel
| Marker | Why it is ordered |
|---|---|
| Total testosterone | The headline number. Must be a morning fasting sample, repeated on a second day. |
| SHBG | Binds testosterone. Needed to calculate free testosterone. |
| LH and FSH | Separates primary (testicular) from secondary (pituitary) hypogonadism. |
| Prolactin | Screens for a pituitary tumour as the underlying cause. |
| Oestradiol | Sometimes added where gynaecomastia or high body fat is present. |
| Full blood count | Baseline haematocrit — testosterone thickens the blood over time. |
| PSA | Prostate baseline, standard for men over 40 before treatment. |
| Iron studies, HbA1c, TFTs | Rule out the common mimics — iron deficiency, diabetes, thyroid disease. |
Which pathology lab you use
A GP request form is generally portable across collection centres. The major Australian networks all run testosterone assays:
- Sonic Healthcare — Douglass Hanly Moir (NSW), Melbourne Pathology (VIC), QML (QLD), Clinipath (WA), Capital Pathology (ACT).
- Australian Clinical Labs — national.
- Laverty Pathology — NSW/ACT.
- Dorevitch Pathology — VIC.
Reference ranges differ slightly between labs and assays, so repeat testing is best done at the same network for comparability. Bring your earlier report to the follow-up appointment.
Timing rules that change the result
- Morning only. Testosterone can read 20–30% lower by mid-afternoon.
- Fasted. A meal — especially glucose — acutely suppresses measured testosterone.
- Not while unwell. Acute illness, poor sleep and heavy training the day before all depress the result. Reschedule.
- Two samples. A single low reading is not a diagnosis under Australian guidance.
What it costs
With a doctor's request and a clinical indication, Medicare rebates the pathology and most collection centres bulk bill, leaving nothing to pay. Testing without a referral is not rebatable. The full cost breakdown covers private and repeat testing scenarios.
Monitoring pathology once you start TRT
| When | What is checked |
|---|---|
| 3 months | Testosterone (trough), haematocrit, symptom review |
| 6 months | Testosterone, FBC, PSA, lipids |
| 6–12 monthly ongoing | Testosterone, FBC, PSA, lipids, blood pressure |
See TRT side effects and safety for what each of those numbers is watching for.
Next steps
Read the complete blood test guide, check your number against normal levels by age, or learn how to read your report.
People also ask
What pathology tests are needed before starting TRT in Australia?+
At minimum two morning fasting total testosterone results on separate days, plus LH, FSH, SHBG and prolactin. Most prescribers also request full blood count, PSA (over 40), liver function, HbA1c and lipids as a safety baseline.
Which pathology labs do testosterone testing in Australia?+
All major networks do — Sonic Healthcare brands (Douglass Hanly Moir, Melbourne Pathology, QML, Clinipath), Australian Clinical Labs, Laverty and Dorevitch. Your GP's request form can normally be taken to any collection centre.
Do I need a specialist to order TRT pathology?+
No. A GP can order the full hormone panel. A specialist (endocrinologist or urologist) is only required for PBS-subsidised testosterone prescribing in most circumstances, not for the tests themselves.
How much does TRT pathology cost?+
With a GP request form and a clinical indication, the collection is normally bulk billed, so $0 out of pocket. Without a referral, private testing typically runs $60–$150 depending on the panel.
How often is pathology repeated once you are on TRT?+
Typically at 3 months, 6 months, then every 6–12 months. Monitoring includes testosterone, haematocrit, PSA and lipids to catch side effects early.
Clinical sources
Get matched with a men's health doctor for low testosterone
Leave your details and a partner men's health clinic will call you at a time that suits, to talk about your symptoms and whether a blood test may be appropriate.
Take the free 2-minute symptom check
The ADAM symptom check shows whether your symptoms may be worth discussing with a doctor. You can also request a callback to get matched with a men's health doctor at a partner clinic, by telehealth or in person, for an assessment.
Start the free assessmentWant to talk to someone first? Read how getting matched with a doctor works.
*Blood tests may be bulk billed where eligible, subject to doctor assessment and clinical indication.