About the document
- Who files:
- The person named on an S1 issued by another country (pensioner, worker, family member)
- Where to submit:
- INSS office (CAISS) with the original S1, or an official registry
- Authority:
- Instituto Nacional de la Seguridad Social (INSS)
- Country:
- Spain
- Category:
- Healthcare and health cards
- How to fill:
- Chat in any language → original form → PDF
- Price:
- form free · chat €3 per document
- Last updated:
What this document is
C-176 (“Registro del documento S-1 para cobertura de asistencia sanitaria en España”) is the official form of Spain’s National Social Security Institute (INSS). It is used to register in Spain an S1 form — the certificate of entitlement to healthcare issued by an insurer in another country.
The S1 is a European document: the country where you are insured (usually the one paying your pension or where you work) covers the cost of your healthcare in your country of residence. Once the S1 is registered, you receive healthcare in Spain on the same terms as people insured here.
Who files it and where
- the person named on the S1: a pensioner of another EU/EEA country, Switzerland or the UK living in Spain, a posted worker or anyone else insured abroad;
- family members of the insured person, if the S1 also covers them — they then enter the details of the insured person they depend on;
- the form is addressed to the INSS Provincial Directorate of your province; you hand it in at an INSS office (CAISS) together with the original S1, or through an official registry. Check the Social Security website for whether an appointment is needed.
What the form asks
- the State that issued the S1 (Estado de aseguramiento);
- applicant details: surnames, given name, DNI/NIE, date of birth, address in Spain with postcode, phone, e-mail;
- insured person’s details — only if the applicant is a family member;
- which documents are enclosed, two consents (data checks with other authorities, messages to phone and e-mail), place and date of signing, INSS province.
What to bring
- the original S1 form;
- your DNI or NIE document and passport;
- EU, Iceland, Liechtenstein, Norway and Switzerland nationals — the EU citizen registration certificate; other nationals — the TIE card;
- family members — proof of kinship with the insured person (marriage or birth certificate).
How to fill it in with FoxDocs
- Tell the chat in any language which country issued your S1 and who it covers.
- The assistant fills in the boxes in capitals, ticks the enclosed documents and consents and adds the signing date.
- Download the PDF, check it, sign it and take it to a CAISS with the original S1.
Source
Official INSS form C-176 cas V.2: seg-social.es — C-176. Checked 2026-10-09. This is not legal advice.