Before you start

For NSSF: employment with a registered employer, who enrols you
Private insurance with explicit medical evacuation cover
A local address and phone number for clinic registration
A realistic understanding of what can and cannot be treated here

Step-by-step

1
Confirm your NSSF enrolment
The National Social Security Fund covers healthcare, occupational risk and pensions, and applies to foreign employees of registered employers on the same terms as Cambodians. Siem Reap's smaller and seasonal employers skip this more often than the capital's — ask for confirmation rather than assuming.
Via employerWho: Your employerFirst weeks of employmentContributions split between employer and employee
2
Buy insurance and read the evacuation clause first
In Siem Reap this is the clause that decides your outcome. It should name an assistance provider, state the destination (Bangkok, usually), and not require pre-authorisation you could not obtain yourself. Check the motorcycle exclusion at the same time — most residents ride.
OnlineWho: YouA few daysWide range — see totals
3
Register at Royal Angkor International Hospital
Royal Angkor is the main private hospital used by foreign residents and visitors, with English-speaking staff and a relationship with international insurers. Register while you are well and find out whether your insurer bills them directly.
In personWho: You~30 minFree to register
4
Find a GP, a dentist and a pharmacy you trust
Routine care and dentistry in Siem Reap are good and cheap. Get recommendations in your first month from the resident community rather than from a hotel concierge, and identify one large, well-run pharmacy — stock quality varies more here than in Phnom Penh.
In personWho: YouOngoingUSD 20–50 for a consultation
5
Know your route out
Work out, before you need it, whether your evacuation goes by air from the new airport, by road to Phnom Penh (about six hours), or overland to Thailand. Air evacuation from Siem Reap is not the same routine it is from the capital, and the answer affects which policy you should buy.
OnlineWho: YouBefore you need itFree to plan

Documents you’ll need

Passport and work permit (for NSSF via your employer)
NSSF card or number
Insurance certificate and 24-hour assistance number
Hospital patient card
A written list of your medications with generic names

Things most newcomers don’t know

Siem Reap's remoteness makes evacuation cover more valuable than in Phnom Penh, not less.

The capital has several private hospitals and a busy international airport twenty minutes from the centre. Siem Reap has one main private hospital and an airport fifty kilometres out. That means both the clinical ceiling and the logistics of getting past it are worse here, and the assistance-provider clause in your policy is doing more work. Compare policies on evacuation first and outpatient limits second.

Source: community-reported / insurer policy documents

Most policies exclude motorcycle accidents, and almost everyone here rides one.

Scooters are the default transport in a town with no public transport, and road-traffic injury is the most likely serious medical event a foreign resident will have. A great many travel and expat policies exclude motorcycle accidents outright, or cover them only if you hold a valid licence for the category and were wearing a helmet. Check the wording and get the Type A licence.

Source: insurer policy documents; consular travel advice

Dengue is worse in the wet season and Siem Reap has plenty of standing water.

Mosquito-borne dengue is endemic across Cambodia and peaks roughly May to October, exactly when Siem Reap's rains fill every gutter, moat and construction pit. There is no specific treatment and the dangerous phase is after the fever breaks, so the practical steps are prevention and getting a blood test rather than assuming a wet-season fever is flu.

Source: Cambodian Ministry of Health; regional public health guidance

Buy medicine from a large chain pharmacy, not the nearest shop.

Cambodia sells most medicines, including antibiotics, over the counter, which is convenient. But substandard and poorly stored stock is a documented regional problem and small tourist-strip shops are the weakest link. Use one of the larger established pharmacies, check expiry dates and packaging, and do not self-prescribe antibiotics.

Source: WHO regional guidance on substandard medicines; community-reported

Common mistakes to avoid

Buying insurance without medical evacuation, in the town where you most need it
Riding a scooter on a policy that excludes motorcycle accidents
Assuming your employer enrolled you in NSSF without checking
Waiting until an emergency to work out how evacuation from Siem Reap actually happens
Treating a wet-season fever as flu instead of testing for dengue

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.