Before you start

Legal residence in Portugal (residence permit, or — for EU citizens here 90+ days — a CRUE/parish-council residence certificate)
NIF (tax number) and proof of a Porto address
For workers: a Segurança Social number (NISS) linked to your utente record

Step-by-step

1
Get your número de utente (SNS user number)
Go to your local centro de saúde (the one for your Porto address — e.g. an ACES Porto Ocidental/Oriental unit) with ID, NIF and proof of residence. They assign a número de utente — the ID needed to book anything in the SNS. EU citizens prove residence with a CRUE; non-EU with a residence permit.
In personWho: YouSame visit, once documents are in orderFree
2
Register at your centro de saúde & request a médico de família
Registering links your utente number to a local centre and puts you in the queue for a family doctor (médico de família). Ask to be added to the waiting list — assignment can take many months in Porto, and many residents go without one for a long time.
In personWho: YouRegistration immediate; family-doctor assignment often monthsFree
3
Learn the access routes: SNS24 line and 112
For non-emergencies, call the SNS24 line on 808 24 24 24 (24/7 triage, advice and help booking). For emergencies call 112. Having an SNS referral (via centro de saúde or SNS24) before an ER visit also keeps it free — an unreferenced, non-admitted ER visit is one of the few things still charged.
OnlineWho: YouImmediateFree (SNS24 / 112 calls)
4
Add private insurance + a private provider (recommended)
To skip waits and family-doctor gaps, take out private insurance (Multicare, Médis, AdvanceCare) and use Porto private hospitals — CUF Porto, Lusíadas Porto, Trofa Saúde, Hospital da Luz. A private GP visit runs ~€40-60; insurance discounts that and covers specialists/exams.
OnlineWho: You (or via employer plan)Cover active in days; some waiting periods for major procedures~€20-50/mo typical (varies with age/cover)

Documents you’ll need

Passport or national ID / residence permit
NIF (Número de Identificação Fiscal)
Proof of Porto address (rental contract, utility bill, or CRUE / parish residence certificate)
NISS (Segurança Social number) if employed
EHIC (EU/EEA/Swiss citizens, for the interim before registering)

Things most newcomers don’t know

The número de utente is the key that unlocks the whole SNS — get it in week one.

Without it you can't book a centro de saúde appointment, get prescriptions in the system, or join the family-doctor queue. It's free and quick, so it's the first health task after you have an NIF and an address.

Source: gov.pt / SNS

Public care is basically free now — the real friction is the family-doctor shortage, not money.

Taxas moderadoras were abolished in June 2022, so SNS visits cost nothing. But hundreds of thousands in Portugal lack a médico de família; in Porto you may wait months, which is the main reason expats pay for private cover.

Source: gov.pt (fee abolition) + provider consensus

Use SNS24 (808 24 24 24) before walking into an ER.

An SNS referral — from your centro de saúde or the SNS24 line — keeps emergency care free; an unreferenced, non-admitted ER visit is one of the few things still charged. SNS24 also triages and books, sparing you a wasted trip.

Source: SNS24 / gov.pt

Common mistakes to avoid

Assuming an EHIC covers you long-term — it's for short stays; once resident you must register for a número de utente
Expecting a family doctor quickly — assignment in Porto often takes many months, and some residents never get one
Walking into a hospital ER without an SNS24/centro de saúde referral and getting billed for the unreferenced visit
Relying on private insurance alone for pre-existing conditions — plans impose waiting periods and exclusions

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