Over 160 million pathology tests are ordered in Australia every year, and nearly 1 in every 2 GP visits involves a blood test (RCPA, 2019). Yet most Australians leave the pathology centre with more questions than answers.
This guide answers the 25 most common blood test questions — with Australian-specific information on Medicare, bulk billing, reference ranges, and where to get tested.
Preparing for Your Blood Test
1. How long do I need to fast before a blood test?
Fast for 8–12 hours before a fasting blood test. An overnight fast ending with a morning appointment is ideal. The most common fasting tests are cholesterol/lipid panels, fasting glucose, and iron studies.
You can and should drink plain water during your fast — staying hydrated makes it easier for the phlebotomist to find your veins. Avoid coffee, tea, juice, cordial, chewing gum, and lollies.
Source: Healthdirect Australia — Fasting for Medical Tests
2. Do all blood tests require fasting?
No. Only specific tests require fasting — primarily cholesterol, fasting glucose, iron studies, and triglycerides. Common tests that do not require fasting include:
- Full Blood Count (FBC)
- Thyroid function (TSH)
- Vitamin D
- HbA1c
- Kidney function (eGFR, creatinine)
- Liver function tests
Always check your pathology request form or ask your GP if you are unsure.
3. Can I take my medications before a blood test?
In most cases, yes — continue taking your regular medications with water unless your doctor has specifically told you otherwise. Exceptions may include thyroid medications (your GP may ask you to delay the morning dose) and some diabetes medications.
4. Does exercise affect blood test results?
Yes. Intense exercise within 24 hours of a blood test can temporarily elevate liver enzymes (ALT, AST), creatine kinase (CK), and inflammatory markers. Light walking is fine, but avoid heavy gym sessions or long runs the day before your test.
Cost, Medicare & Bulk Billing in Australia
5. Are blood tests bulk billed in Australia?
Approximately 85% of all pathology services in Australia are bulk-billed — the highest rate of any medical specialty. This means Medicare pays the full fee and you pay nothing out of pocket. However, bulk billing is at the pathology provider's discretion and is not guaranteed for all patients.
Source: Keep Pathology Bulk Billed — Australian Pathology
6. How much does a blood test cost without bulk billing?
If you are not bulk billed, costs vary significantly:
- Standard tests (FBC, lipids, glucose): $30–$80
- Comprehensive panels: $100–$400
- Hospital labs: A Complete Blood Count can cost up to $350 at a hospital vs ~$46 at a community collection centre
Source: Healthdirect — Paying for Diagnostic Testing
7. Do I need a doctor's referral to get a blood test?
For Medicare-funded (bulk billed) tests: yes, a GP or specialist referral is required. For private testing, a referral is not always necessary — services like i-screen, iMedical, and Express Pathology allow you to order tests directly online. You can also get a pathology referral via telehealth without visiting a GP in person.
8. Has Medicare changed blood test rules recently?
Yes. From 2025 onwards, Medicare introduced restrictions on certain tests. Vitamin B12 testing is now bulk-billed only once every 12 months unless the previous result was abnormal. These restrictions are part of the Quality Use of Pathology Program (QUPP) to reduce clinically unnecessary testing.
Where to Get Blood Tests in Australia
9. What are the main pathology providers?
| Provider | States | Notes |
|---|---|---|
| QML Pathology | QLD | 500+ collection centres |
| Sullivan Nicolaides (SNP) | QLD, NSW, NT | 450+ centres; walk-in for most tests |
| Laverty Pathology | NSW | Sydney, Hunter, Central Coast, Illawarra |
| Melbourne Pathology / Dorevitch | VIC | Major Victorian networks |
| Australian Clinical Labs (ACL) | National | Operates across multiple states |
| 4Cyte Pathology | NSW, VIC, QLD | Growing private network |
| PathWest | WA | WA public system |
| SA Pathology | SA | SA public system |
10. Do I need an appointment at a pathology centre?
For most standard blood tests, no appointment is needed — you can walk in. However, booking online is recommended during peak morning hours (7:30–9:00 am) to avoid long waits. Some tests like the Glucose Tolerance Test (GTT), which takes 2 hours, do require a booked appointment.
Understanding Your Results
11. How do I read my blood test results?
Your pathology report shows four key elements for each test:
- Test name — e.g., "Haemoglobin", "TSH", "Glucose"
- Your result — a numerical value with units (e.g., mmol/L, g/L)
- Reference range — the normal interval for healthy adults
- Flag — results outside range are marked H (High) or L (Low)
A flagged result does not automatically mean something is wrong — context, trends over time, and your symptoms all matter. Always discuss results with your GP.
Source: Pathology Tests Explained — Reading Your Results
12. What does "reference range" actually mean?
A reference range is established by testing a large population of healthy people and capturing the middle 95% of results. This means 5% of perfectly healthy individuals will naturally fall outside the range on any given test.
Critically, reference ranges vary between laboratories. Always use the range printed on your own report, not one from another website.
Source: RCPA — Harmonised Reference Intervals
13. Where can I access my results?
Your results are typically sent to your requesting doctor within 24–48 hours. You can access them via:
- Your GP's patient portal
- My Health Record — Australia's national digital health record
- Pathology lab portals — QML MyResults, Capital Pathology MyTest, etc.
- Request a copy directly from your GP clinic
For long-term tracking, apps like BloodTrack let you upload results and visualise trends across all your biomarkers over time.
14. How long do results take?
- Routine tests (FBC, lipids, glucose, thyroid): 24–48 hours
- Urgent tests (hospital): within 1 hour
- Complex/specialised tests (genetic, autoimmune): 3–14 days
Normal Ranges for Common Tests
15. What are normal blood test ranges in Australia?
Key Australian reference ranges (always use your own lab's printed ranges):
| Marker | Normal Range | Notes |
|---|---|---|
| Haemoglobin (male) | 130–180 g/L | |
| Haemoglobin (female) | 115–165 g/L | |
| Platelets | 150–400 × 10⁹/L | |
| Total Cholesterol | < 5.5 mmol/L | Desirable |
| LDL Cholesterol | 1.7–3.5 mmol/L | |
| HDL Cholesterol | 0.9–2.1 mmol/L | |
| Triglycerides | 0.5–1.7 mmol/L | Fasting |
| Fasting Glucose | 3.6–6.0 mmol/L | |
| HbA1c | < 5.7% (< 39 mmol/mol) | Non-diabetic |
| TSH | 0.5–5.0 mIU/L | |
| Vitamin D | ≥ 50 nmol/L | Adequate |
Source: RCPA Harmonised Reference Intervals
16. What is a Full Blood Count (FBC)?
The FBC is Australia's most frequently ordered blood test, with an estimated 28 million performed annually. It measures:
- Red blood cells & haemoglobin — checks for anaemia
- White blood cells — immune system activity and infection
- Platelets — blood clotting ability
- MCV, MCH — red cell size and haemoglobin content (classifies anaemia type)
The FBC does not require fasting.
17. What does a cholesterol test measure?
A lipid panel measures four values. High cholesterol affects approximately 1 in 3 Australians:
- Total cholesterol — desirable below 5.5 mmol/L
- LDL ("bad") cholesterol — builds up in artery walls; target often < 2.0 mmol/L for high-risk patients
- HDL ("good") cholesterol — removes excess cholesterol; higher is better
- Triglycerides — fasting level should be < 1.7 mmol/L
18. What is HbA1c and what do the numbers mean?
HbA1c reflects your average blood sugar over the past 8–12 weeks, making it more informative than a single fasting glucose reading:
| Result | Interpretation |
|---|---|
| < 5.7% (< 39 mmol/mol) | Normal |
| 5.7–6.4% (39–47 mmol/mol) | Increased risk / pre-diabetes |
| ≥ 6.5% (≥ 48 mmol/mol) | Diabetes diagnosis threshold |
| < 7.0% (< 53 mmol/mol) | Target for most people with diabetes |
HbA1c does not require fasting. Source: Healthdirect — HbA1c Test
19. What does my TSH result mean?
TSH (Thyroid Stimulating Hormone) is the first-line test for thyroid screening. Normal range: 0.5–5.0 mIU/L.
- High TSH (> 5.0): suggests underactive thyroid (hypothyroidism) — fatigue, weight gain, cold intolerance
- Low TSH (< 0.5): suggests overactive thyroid (hyperthyroidism) — weight loss, anxiety, rapid heartbeat
20. Am I vitamin D deficient?
Despite being one of the sunniest countries on Earth, 23% of Australian adults are vitamin D deficient — rising to 36% in winter (ABS data). Australian levels:
- Deficient: < 30 nmol/L
- Insufficient: 30–49 nmol/L
- Adequate: ≥ 50 nmol/L
Source: Australian Bureau of Statistics — Vitamin D
How Often and What to Test
21. How often should I get a blood test?
| Test | Recommended Frequency |
|---|---|
| Full health screen | Annually from age 40; every 2 years if healthy under 40 |
| Cholesterol / Lipids | Every 5 years from age 45; annually if high cardiovascular risk |
| Diabetes screening | Every 3 years from age 40 |
| Thyroid function | Every 1–2 years if symptomatic |
| Vitamin D | Annually in winter for at-risk groups |
Australians aged 45–49 are eligible for a Medicare-funded Health Assessment via their GP.
22. What blood tests should I get at an annual check-up?
A standard Australian GP annual check-up typically includes:
- FBC — anaemia, immune function
- EUC/UEC — kidney function (electrolytes, urea, creatinine)
- LFTs — liver function tests
- Fasting lipids — cholesterol panel
- Fasting glucose or HbA1c — diabetes screening
- TSH — thyroid function
- Iron studies — especially for menstruating women
- Vitamin D — deficiency screening
- PSA — for men over 50 (discuss with GP)
23. What is the difference between "normal" and "optimal"?
A result within the reference range is statistically normal — it falls within the middle 95% of a healthy population. But normal and optimal are not the same.
Example: a fasting glucose of 5.9 mmol/L is technically within range (< 6.0) but sits at the very top. Many clinicians consider an optimal fasting glucose to be below 5.0 mmol/L.
This is why tracking your results over time — not just checking a single snapshot — provides far more actionable insight.
Tracking Your Results Over Time
24. Can I track my blood test results myself?
Yes — and it is strongly recommended. Single readings have limited value compared to trending results across multiple tests. Benefits of tracking:
- Catch gradual changes before they become clinical problems
- Identify seasonal patterns (e.g., vitamin D dropping in winter)
- See how lifestyle changes affect your markers
- Have more informed conversations with your GP
BloodTrack lets you upload your lab reports, track every biomarker over time, and get AI-powered insights on what your results mean — all in one dashboard.
25. What should I do if my results are abnormal?
An abnormal result does not automatically mean you are seriously ill. Consider:
- Single vs. pattern — one off-range result is very different from a trend
- How far outside range — slightly vs. significantly abnormal
- Your symptoms and history — context matters
- Test conditions — a non-fasting glucose of 7.2 mmol/L is expected after a meal
Your GP will interpret results in full clinical context. If you are concerned, always follow up — do not wait for the clinic to call you.
Last updated: April 2026
This article is for informational purposes only and does not constitute medical advice. Always consult your GP or healthcare provider for personalised guidance.
