If your trek operator asks for a medical form, send its requirements and your itinerary before booking a GP assessment. The right appointment depends on your history, the form and any examination or tests it needs.
Ask the team about a medical report assessment and share your departure date. Suitability, the full fee and expected turnaround are confirmed before you proceed.
Why do tour operators ask for a medical form before a trek?
Operators running high-altitude or remote treks - Kilimanjaro, Everest Base Camp, the Inca Trail, Toubkal, polar itineraries - increasingly ask for medical confirmation before they confirm a place, and their reasons are practical rather than bureaucratic. At nearly 6,000 metres, a health problem that would be routine at sea level becomes a serious one, and evacuation from the upper mountain is slow and weather-dependent.
The requirements are set operator by operator. Some publish them openly: ALPO Expeditions, for example, asks climbers with cardiovascular or respiratory conditions for a formal doctor's clearance before booking, makes that clearance mandatory for climbers over 60, requires a medication list in advance, and checks that every climber holds travel insurance with altitude coverage. Other operators send their own medical form once you book, with their own questions and their own deadline. Because each form is different, the first practical step is always the same: get the actual form from your operator early, read what it asks, and book your medical assessment with enough time to repeat a measurement or arrange a test if the form turns out to want one.
What does the doctor actually assess?
A fitness-to-trek assessment should be matched to your specific itinerary and the operator's requirements. Topics to discuss with the doctor include:
- Your medical history, including heart and lung conditions, previous altitude illness, surgery, and anything that has needed hospital care.
- Your current medicines. Some need review before altitude, and operators commonly ask for the list itself.
- Your fitness for consecutive days of exertion. Honest judgement matters here: long descents stress knees and hearts differently from the climb up.
- Your vaccination and malaria position for the region, and where to complete anything missing.
- Recent results. A blood pressure reading on the day and any recent blood tests often answer the form's questions directly. Where the operator asks for a resting ECG or specific bloods, identifying that early avoids a second appointment the week before departure.
If the assessment finds something that needs attention first, ask the doctor what needs to happen next and how that affects your departure date. A medical form records the clinical assessment; it is not a guarantee of clearance for a particular route.
What does the evidence say about altitude?
Altitude is the part of the assessment most worth taking seriously, and the guidance is well established. The CDC Yellow Book's high-altitude chapter and the Wilderness Medical Society's clinical practice guidelines agree on the core points:
- Gradual ascent is the most effective protection against acute mountain sickness. The recommended pattern is to avoid ascending to a sleeping altitude above roughly 2,750 metres in a single day, to increase sleeping altitude by no more than about 500 metres per night once above 3,000 metres, and to add an extra acclimatisation night for every 1,000 metres gained.
- Staging the ascent helps: spending two to three nights around 2,450 to 2,750 metres before going higher is markedly protective.
- Physical fitness does not protect against altitude illness. Susceptibility varies from person to person and there is no simple screening test that predicts it - which is why a strong runner and a less fit companion need the same honest conversation about ascent profile.
- Where an itinerary forces faster ascent, preventive medication is worth discussing with the doctor. Whether it is appropriate depends on your itinerary and your health, and the consultation is the right place for that conversation, including what to expect if you take it.
- Travellers who arrive abruptly at high-altitude airports above about 3,400 metres face substantially higher rates of altitude illness, which is why itineraries through cities such as Cusco or La Paz deserve particular planning.
The symptom conversation matters most of all. Early acute mountain sickness typically looks like a headache with nausea, dizziness or fatigue after a recent gain in sleeping altitude. The rule the Yellow Book and the Wilderness Medical Society share is simple: do not ascend further with symptoms, and descend if symptoms worsen at the same altitude. Ask the doctor about symptoms that mean stopping or descending, and make sure your trekking team has a plan for getting help.
Which conditions change the conversation?
The CDC Yellow Book groups conditions by how they affect risk at altitude. Well-controlled asthma, controlled hypertension and stable diabetes sit in its lower-risk group; conditions such as significant lung disease, poorly controlled blood pressure or sickle cell trait need more careful assessment; and a heart attack or stroke less than 90 days before ascent is among the contraindications listed in the CDC guidance. Pregnancy also changes the picture: guidance suggests caution about sleeping altitudes above about 3,050 metres during pregnancy.
None of this means a fixed list of who can and cannot go. It means the assessment is individual: the same form means something different for a healthy 30-year-old on an eight-day route with gradual ascent and a 62-year-old with controlled hypertension on a faster itinerary. Ask the doctor to explain any concerns about your proposed route and whether another itinerary would be safer.
What can a medical form not predict?
A signed form is not protection against altitude illness. The CDC explains that susceptibility varies and there is no simple screening test that predicts who will become ill. Even a traveller who has adjusted well to one altitude can develop symptoms after moving to a higher sleeping altitude. Keep following the ascent and symptom plan during the trip, rather than treating a pre-travel assessment as permission to ignore new symptoms.
What should you bring to the consultation?
The more complete the picture, the more useful the form. Bring the operator's form itself, your itinerary with the planned sleeping altitudes if you have it, an exact list of your medicines with doses, any recent blood results or clinic letters, a recent blood pressure reading if you can get one, and your vaccination record. If you have had altitude illness before, dates and details help. And if the operator requires travel insurance with altitude coverage - some check it at the pre-trek briefing - confirming your policy covers the planned altitude is part of the same preparation.
How far ahead does preparation really start?
The form is the last step of preparation, not the first. Vaccination courses for some destinations need spacing over weeks, and malaria prevention needs choosing to fit the region and your other medicines. If your itinerary includes time at altitude before the trek itself - flying into a high-altitude city, for example - the acclimatisation plan starts from arrival, not from the trailhead. Building the medical assessment into your preparation four to eight weeks before departure leaves room for all of this without rushing. If your trek is sooner, share the deadline before booking. Whether an assessment is suitable depends on the form, your history and any examination or tests required. Ask about the next available appointment.
Travel insurance is part of the medical picture
Operators increasingly require travel insurance that explicitly covers trekking to your planned altitude, and some check it before the trek begins. Check that your policy covers the actual trek, its maximum planned altitude and any rescue or evacuation needs. Do not judge cover by the itinerary's marketing name alone. The medical form and the insurance policy answer different questions - one gives the operator the doctor's assessment, while the other sets out which insured costs are covered - and you need both to be right.
Can the form be completed after a video consultation?
A video GP service is available, but that does not mean every trek medical form is suitable for a remote assessment. Send the operator's requirements before booking. The doctor can then confirm whether the medical report service is suitable and whether an examination, records or tests are needed. The assessment cannot guarantee a particular conclusion or acceptance by the operator.
What does it cost, and when should you book?
The full fee, scope of the report, any examination or tests needed and expected turnaround should be confirmed before you proceed. Send the operator's actual form rather than booking a general consultation and assuming a signed document is included.
On timing, follow your operator's deadline first - some specify how recently the form must be signed. Within that, earlier is safer: it leaves room for a repeat reading, an extra test, or a vaccination course that needs spacing. The week before departure is when forms go wrong, not when they should start.
Frequently asked questions
How far before my trek should I get the form signed?
Check your operator's own window first, because some specify how recently the form must be signed. Within that, earlier is better: it leaves room for a repeat blood pressure reading, an extra test, or an operator query without time pressure.
Can you complete my operator's specific form?
Send the operator's specific form before booking. The team needs the actual requirements so the doctor can confirm whether the medical report service is suitable. Do not assume every template can be completed or that the operator will accept a generic letter.
Is a video consultation enough, or do I need to come in?
That depends on the form and your clinical needs. A video consultation is not a substitute for an examination that the form requires. Share the requirements and any recent records first so the appropriate next step can be confirmed.
Will the doctor discuss altitude sickness prevention?
Ask for advice about your ascent profile, prevention and symptoms that mean stopping or descending. Bring the planned sleeping altitudes and tell the doctor about any previous altitude illness. Whether preventive medication is suitable is an individual clinical decision.
I have had altitude sickness before. Does that rule me out?
Previous altitude illness is important to discuss before you travel. Tell the doctor what happened, at which altitude and how quickly you had ascended. Your earlier response to altitude and the new itinerary both matter when assessing risk.
I take regular medication. Will that be a problem?
Usually not, but it needs review. Some medicines need adjustment before altitude, and operators commonly ask for the medication list itself. Bring an exact list, including doses.
Does physical fitness mean I will avoid altitude sickness?
No. The CDC Yellow Book is explicit that fitness does not protect against altitude illness. Fitness helps you enjoy the walking; it does not change how your body handles thin air, and the assessment is honest about that.
What happens if the assessment finds a problem?
Ask what needs to happen next and whether your itinerary or departure date needs to change. The doctor may need further records, an examination or tests before reaching a conclusion. A request for a form does not oblige a doctor to certify fitness for the trek.
Book your fitness-to-trek consultation
Send your operator's form and itinerary before booking and ask whether the medical report service is suitable. Request an appointment on WhatsApp, call 020 3951 3429, or email team@thewellnesslondon.com. Tell the team what you need and ask about the next available appointment. Availability is confirmed before you book.
GP medical reports
Read about the medical report assessment service and send the recipient's requirements before booking.