Sick Leave Certificate for Flu, Gastro, Migraine and Common Conditions
OMC Health issues sick leave certificates for common short-term conditions. This hub focuses on common conditions that may affect short-term work capacity and helps users choose the right next step. For the complete clinical condition library, use the main Conditions page.
- Real-time phone consultation
- AHPRA-registered GP
- Covers flu, gastro, migraine, back pain and more
- Accepted by employers Australia-wide
- Same-day issuance if approved
- One-off payment
- Full refund if declined
- Same-day delivery if approved
Certificates for Everyday Illness
A sick leave certificate request for a common illness is assessed in real time by an AHPRA-registered GP. The GP considers the current symptoms, how they affect the person's actual work and whether certification is clinically appropriate.
Everyday illnesses can affect work in very different ways. Gastrointestinal symptoms may make it difficult to stay at a workstation, back pain may limit lifting or driving, while migraine, dizziness or poor sleep may affect concentration and safety even when someone can still manage basic activities at home.
The useful question is therefore not simply which condition you have, but what work problem it creates and whether telehealth is an appropriate way to assess it.
Key Facts
Clinical assessment
A listed condition does not automatically result in a certificate. The GP assesses current work capacity and safety.
Phone or video
Consultations are conducted in real time by phone or video, depending on what is appropriate for the assessment.
Escalation when needed
Telehealth is not used as a substitute for urgent or necessary in-person medical assessment.
Browse Conditions by the Work Problem They Create
Different conditions affect work capacity for different reasons. Use the groups below to understand the main work-capacity question and move to a more specific condition page where one is available.
Infectious Illness and Exclusion
Flu-like illness, colds, sinus symptoms and some infections may affect work through fever, fatigue or transmission risk. Some illnesses also have specific exclusion considerations.
Pain and Movement Limits
Back or nerve pain becomes a work-capacity issue when sitting, standing, lifting, bending, driving or other required movements cannot be performed safely.
Concentration or Alertness
Migraine, poor sleep, dizziness, concussion or significant fatigue can matter because they affect concentration, reaction time, judgement or safety-sensitive duties.
Gastrointestinal Urgency
Vomiting, diarrhoea, abdominal pain or unpredictable urgency can make travel, customer-facing work or remaining at a workstation impractical.
Pregnancy-Related Symptoms
Nausea, vomiting, fatigue, dizziness or other pregnancy-related symptoms are assessed by their functional impact rather than pregnancy alone being treated as incapacity.
Mental Health Presentations
The work question may involve concentration, emotional regulation, sleep, decision-making, communication or the ability to perform the actual role safely.
Do Not Book a Certificate First if You Need Urgent Care
Do not book a certificate first if the symptoms suggest urgent or in-person assessment. Examples include severe breathing difficulty, severe chest pain, new neurological weakness or confusion, severe dehydration, or another medical emergency.
Call 000 for emergencies. If you are unsure what level of care is appropriate, Healthdirect can help you navigate the next step.
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Book Your Certificate
Select the sick leave medical certificate type on the OMC Health booking page, and tell us a bit about your situation.
Consult with an AHPRA-Registered GP
Receive Your Certificate If Approved
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Book a real-time consult with an AHPRA-registered GP. From 9.99
What Makes a Common Illness Relevant to Work Capacity?
Feeling unwell does not automatically mean someone is medically unfit for work. The GP looks at the severity and pattern of symptoms together with the actual duties the person needs to perform.
Function
Can the person concentrate, move, communicate and perform the essential tasks of the role?
Safety
Could dizziness, fatigue, pain or slowed reaction time create risk when driving, lifting or operating equipment?
Workplace impact
Do vomiting, diarrhoea, fever or infectious symptoms make normal attendance impractical or inappropriate?
Where symptoms are expected to affect work for more than one day, see how a multi-day sick leave certificate is assessed.
The Condition Name Is Only One Part of the Decision
Two people with the same illness can have different work-capacity outcomes because their symptoms, recovery pattern and job demands differ.
A desk worker with back pain, a delivery driver with vertigo and a hospitality worker with gastro each raise different functional and safety questions even if all are requesting short-term leave.
When Phone, Video or In-Person Assessment May Be Needed
Your consultation is conducted in real time by phone or video. The GP may require video or recommend in-person assessment where visual or physical assessment is clinically necessary.
A symptom history may provide enough information in some situations. In others, visible breathing effort, a rash, swelling, movement problems, neurological features or uncertainty about severity can change what assessment method is appropriate.
For more detail on consultation format, see when a medical certificate consultation may use phone or video.
Telehealth Must Be Clinically Appropriate
The consultation method should allow the GP to obtain enough information for a safe assessment. If it cannot, another assessment pathway may be recommended.
What the Certificate Records
OMC Health's standard sick leave certificate records the relevant consultation and issue details, the certified period and the issuing practitioner's details. It does not need to become a detailed report about the underlying illness.
The diagnosis is not routinely required on the standard certificate, although organisation-specific forms or particular circumstances can involve different information requirements.
Once issued, an OMC Health certificate can be checked using its verification details at certificate verification.
When Remote Assessment Is Not Enough
If the GP cannot safely assess the presentation through telehealth, they may recommend an in-person examination or another appropriate service rather than treating certificate issuance as the priority.
This can be relevant when objective examination, measurements, testing or a more detailed physical assessment is needed to understand the symptoms or exclude a more serious problem.
When Is an Approved Certificate Issued?
If the GP decides that a certificate is clinically appropriate, OMC Health aims for same-day issuance. The time needed for the consultation and certificate process can vary according to the presentation and what the GP needs to assess.
Consult timing varies
A short, straightforward presentation and a more complex assessment should not be expected to take exactly the same amount of time.
How long a telehealth consult takes →Simple, transparent pricing
- AHPRA reviewed by a registered GP
- Delivered on the same day if approved
- Secure and confidential
- Full refund if GP declines
- No hidden fees
Frequently asked questions
View all FAQsMost gastro cases resolve within 1 to 3 days, and that's the typical range a GP certifies for a straightforward case. If your symptoms are more severe or lasting longer than usual, the GP may recommend a longer period or an in-person review instead of a phone consult.
Yes. A GP can assess a migraine by phone in most cases, focusing on how it's affecting your ability to concentrate and work rather than requiring a formal neurological diagnosis. Mentioning any history of migraines helps the GP assess the current episode more quickly.
This depends on your specific symptoms and how you're recovering, so there's no fixed number of days. The GP weighs your current presentation, how contagious you're likely to still be, and the physical demands of your job before certifying a period.
Not usually, for a straightforward case. A phone or video consult is generally enough for the GP to assess your symptoms and decide whether a short certificate is appropriate, though they'll flag if anything suggests an in-person review or urgent treatment is needed.
Sinus infections are commonly certified for a day or two if symptoms are affecting your ability to work, though this varies depending on severity and whether the infection is showing signs of resolving or needing further treatment.
OMC Health issues sick leave certificates for common short-term conditions such as flu, gastro, migraine, back pain, sinusitis and UTIs. Most consults occur by phone, though the GP may request video if a more detailed assessment is clinically indicated.