How Blood Test Referrals Are Issued

Blood tests are one of the most common and useful medical investigations in Australia. They help doctors confirm or rule out diagnoses, assess severity, monitor chronic conditions, and check whether medicines can be used safely. But blood tests are not ordered “just because” — they are issued based on clinical assessment and a clear question the doctor is trying to answer.

When a doctor orders blood tests, they issue a blood test referral, also known as a pathology request. This is the document you take to a pathology collection centre so a collector can take your blood and send it to a laboratory for testing. The request specifies exactly which tests are required and where the results should be sent.

This guide explains how blood test referrals are issued, what doctors consider before ordering tests, what's included on a request form, common blood test categories, fasting and preparation rules, how telehealth can be used to issue blood test requests, how results are handled, privacy considerations, and how to follow up safely. This content is general information only and not medical advice.

Blood test referral vs “getting a blood test”

In Australia, most blood tests require a request from a clinician (a “referral” or “pathology request”) so that the pathology provider knows what to test and where to send results. Patients often say “I need a blood test”, but clinically it's more accurate to say, “I need a doctor to assess me and decide what blood tests are appropriate.”

This matters because blood tests are only useful when the right tests are ordered for the right reasons and the results are reviewed in context. Ordering random tests without a plan can create confusion, false alarms, or missed diagnoses.

Step 1: The doctor assesses your symptoms, history, and risk

A blood test referral begins with a clinical assessment. Whether the consult is in person or via telehealth, the doctor needs to understand your symptoms and context. They will usually ask about:

• What symptoms you have and when they started.
• How severe they are and whether they are changing.
• Red flags that might require urgent care.
• Relevant medical history (for example, diabetes, thyroid disease, kidney disease).
• Medications and allergies (some medicines affect test results and safety decisions).
• Any recent infections, travel, or exposures if relevant.

This information helps the doctor decide which tests are clinically appropriate. If you want a clear patient checklist, read What Information Doctors Need During Telehealth Consultations.

Step 2: The doctor identifies the clinical question

Doctors don't order tests just to “see what comes back”. They usually have a working diagnosis (or a few possibilities) and a clinical question. For example:

• Is there evidence of infection or inflammation?
• Is the patient anaemic or iron deficient?
• Is thyroid dysfunction contributing to symptoms?
• Is kidney or liver function safe for a medication plan?
• Is diabetes present or controlled?
• Is cholesterol elevated and does it change long-term risk management?

Clarifying the question helps choose the correct tests and prevents unnecessary testing.

Step 3: The doctor selects the appropriate tests

Once the doctor has assessed you and clarified the clinical question, they choose the tests. Many blood test requests are “panels” (grouped tests) that are commonly ordered together. The exact selection depends on your symptoms, history, age, and risk profile.

Common blood tests doctors may request

Below are examples of blood tests that are commonly ordered, depending on the clinical context.

General screening and symptom investigation

• Full blood count (FBC) for anaemia, infection markers, and platelets.
• Electrolytes and kidney function tests.
• Liver function tests.
• Inflammation markers (when clinically indicated).

Fatigue, dizziness, and “low energy” evaluation

• Iron studies (when appropriate).
• Thyroid function tests.
• Vitamin or nutrient tests when clinically indicated.

Metabolic and cardiovascular risk

• Cholesterol and lipid testing.
• Diabetes screening or monitoring tests.

Medication safety monitoring

Some medicines require monitoring of liver function, kidney function, or other markers. Doctors may order blood tests before starting a medicine or during ongoing treatment to ensure safety.

Step 4: The blood test referral (pathology request form) is issued

Once tests are chosen, the doctor issues a pathology request form. This form tells the pathology provider what to collect and what to test. While different labs have different templates, most blood test requests include:

• Your identifying details (name, date of birth, and other identifiers).
• The referring doctor's details (name, provider number, practice details).
• The list of requested tests (tick boxes or test names).
• Clinical notes or reason for testing (brief context).
• Collection instructions (for example, fasting or timed collection).
• Where results should be sent (usually back to the referring doctor).

This request can be provided in different formats depending on the service, including secure digital delivery in some telehealth models.

Can telehealth doctors issue blood test referrals?

In many cases, yes. Telehealth doctors can issue blood test referrals when it is clinically appropriate, based on a genuine assessment. Telehealth can be particularly useful for common symptom investigations, chronic disease monitoring, and follow-up testing. The key requirement is that the doctor can assess you safely and has a plan to review results and provide next steps.

Telehealth may not be appropriate if severe symptoms, red flags, or physical examination are needed first. In those cases, the safest pathway may be urgent in-person assessment rather than issuing routine tests. For suitability guidance, read When Telehealth Is Not Appropriate.

Step 5: You attend a pathology collection centre

After receiving the request, you attend a pathology collection centre. A collector confirms your identity, checks the request, and collects blood. The collection itself is usually quick. If you are anxious or have difficult veins, tell the collector — they are used to supporting people through this.

Bring the request form (or any digital instructions), and follow any preparation steps such as fasting.

Fasting and preparation: what you need to know

Some blood tests require fasting, while many do not. If fasting is required, it usually means no food for a set number of hours, but water is typically allowed. The exact requirement depends on what tests were ordered.

Always follow the instructions on the request form or confirm with the pathology centre. If you accidentally ate before a fasting test, tell the collector — they can advise whether to proceed or reschedule.

Step 6: Results are processed and sent to the doctor

Blood samples are sent to a laboratory where tests are performed. Turnaround times vary: some results return quickly, while specialised tests take longer. Results are typically returned to the referring doctor, who interprets them in context of your symptoms and history. This is important because “abnormal” results don't always mean a serious illness, and “normal” results don't always rule everything out.

Step 7: Follow-up and next steps

A blood test referral is only half the process. The second half is reviewing results and deciding what to do next. The doctor may:

• Reassure you if results are normal and symptoms are improving.
• Recommend treatment (for example, supplements for deficiency, changes to medicines).
• Order additional tests to clarify findings.
• Refer you to a specialist if results suggest it's needed.
• Advise urgent assessment if results indicate high risk.

It's reasonable to ask: “How will I receive my results?” and “When should I follow up?” If you're using telehealth, it helps to clarify the review pathway upfront.

Why doctors sometimes decline “just a blood test” requests

Some patients request blood tests without wanting a clinical assessment. Clinicians may decline because tests should be tied to symptoms, history, and a plan for interpretation. Random testing can lead to false positives, anxiety, and unnecessary follow-ups. A safe clinician will instead assess what you're experiencing and choose appropriate tests based on clinical judgement.

This is similar to why not all requests result in medical certificates: clinicians must act within professional standards and issue documents only when clinically appropriate. Read Why Not All Requests Result in Medical Certificates.

Privacy and pathology referrals

Blood test requests contain personal and health information. Pathology providers and clinics are expected to handle health data securely. As a patient, you can ask where your results will be sent and how they will be stored. If privacy is a concern for you, discuss it during your consultation.

For broader privacy guidance, read Medical Certificates and Patient Privacy.

How Dociva can support blood test referrals

Dociva is designed around clinically appropriate telehealth and clear documentation. Where blood tests are clinically appropriate, clinicians may issue pathology requests based on assessment and provide guidance on preparation and follow-up so results can be reviewed and acted on safely. If you want updates during pre-launch, use pre-launch sign-up.

Frequently Asked Questions (FAQs)