Malaria risk runs through much of Madagascar, and Madirovalo, a small town in the Boeny region of the country's northwest, sits within that risk zone at a low enough elevation that prophylaxis is worth discussing with a travel clinic before you depart - one honest reason to carry proper coverage, alongside the town's genuine distance from full medical care.
Local clinics in and around Madirovalo handle routine complaints, but anything serious is typically stabilized on site if possible and then referred toward Antananarivo, Madagascar's capital and the country's real medical hub, a long journey away by road or domestic flight. Mahajanga, the larger coastal city closer to Madirovalo, offers more developed care than the town itself but still falls short of what the capital can provide for a complex case. Confirm your policy covers medical evacuation and transfer within Madagascar, since that journey - not treatment in Madirovalo itself - is the part most likely to cost real time and money.
Roads in this part of Madagascar can be difficult to impossible after heavy rain, and the rainy season, roughly November through March, adds real delay to any journey toward Antananarivo or even to Mahajanga, on top of the malaria risk that already runs through the wet months. Confirm your policy covers weather-related travel delay alongside standard medical and evacuation benefits, since either could matter depending on timing.
Keep any local clinic paperwork, receipts for treatment or transport, and records of any referral between facilities, since documentation from remote parts of Madagascar can be inconsistent and is worth gathering as you go. Check whether your existing health cover extends abroad and specifically to Madagascar before you travel - many home policies quietly stop at the border - and confirm your travel policy's claims process for evacuation before you need it, since a place this remote leaves little room to sort out gaps after something has gone wrong.