To undergo gender affirmation surgery in Spain, no psychiatric report or ‘dysphoria’ diagnosis is required. However, a series of medical requirements must be met, which each surgical team assesses on a case-by-case basis: being of legal age, being in suitable health for the intervention, having received complete information, and having realistic expectations about the outcome. It is important to distinguish from the outset between legal requirements (which Law 4/2023 greatly simplified) and medical requirements (which depend on each specific surgery).
Below, you will see what you need to access gender affirmation surgery, the difference between the legal and surgical processes, what documentation is usually requested, and why individual assessment is the step that truly determines if an intervention is right for you. If your process involves feminizing surgery, you can review your case with the body feminization surgery team.
Legal and Medical Requirements Are Not the Same
This is the most common confusion, and it needs clarification. Changing legal sex in the Civil Registry and undergoing surgery are two independent matters, with distinct requirements.
Since Law 4/2023, the legal sex change is done by the person’s free will, without the need for a medical or psychological report and without requiring prior hormone therapy. However, this depathologization affects the legal process, not the surgery. A surgical intervention remains a medical act that requires a clinical assessment, just like any other operation. That is to say: you can change your legal sex without surgery, and you can have surgery without the law obliging you to have previously made the legal change.
General Medical Requirements for Gender Affirmation Surgery
Although each procedure has its peculiarities, there are a series of conditions that most surgical teams assess before gender affirmation surgery:
- Being of legal age. Affirmation surgeries are generally reserved for adults.
- A general health status compatible with the intervention and anesthesia.
- Having received complete information about the technique, risks, and recovery, and providing informed consent.
- Having realistic expectations about what surgery can and cannot offer.
- Stability in the decision, assessed during consultation with the medical team.
For some surgeries, depending on the case and the team’s criteria, a prior period of hormone therapy or an assessment by different specialists may be recommended. This is not a bureaucratic process to ‘prove’ anything, but rather part of the medical preparation to ensure the intervention is safe and the outcome satisfactory.
Requirements Change Depending on the Surgery
A masculinizing mastectomy is not the same as a vaginoplasty or facial feminization. Each intervention has its own preparation criteria, preliminary tests, and specific conditions, because the surgical complexity and recovery are very different in each case.
For genital surgeries, such as vaginoplasty or phalloplasty, preparation is usually more demanding and, depending on the case, a prior period of hormone therapy may be considered. In a masculinizing mastectomy, the focus is on general health and planning the technique according to each person’s characteristics. And in facial feminization, being surgery on bone structures and soft tissues, the assessment focuses on thoroughly studying the initial anatomy. Therefore, there is no single list of valid requirements for ‘gender affirmation surgery’ in general: what exists is an assessment per procedure, which determines if a person is a good candidate for that specific surgery at that specific time.
What Documentation and Tests Are Usually Requested Before Surgery
As with any major surgery, a preoperative study is performed before a gender affirmation intervention to ensure that it can be performed safely. This usually includes:
- An initial medical assessment reviewing the clinical history and background.
- Analytics and preoperative tests according to the procedure.
- A pre-anesthetic assessment to confirm that anesthesia is safe.
- Signing of informed consent, after explaining the technique, risks, and recovery.
These steps are not specific to trans surgeries: they are the same safety controls applied in any operation, adapted to each specific case.
Common Myths About Surgery Requirements
Ideas circulate around this topic that no longer align with current legal or medical realities. It is important to clarify them:
- “I need a psychiatric report confirming I am trans.” This is not the case: Law 4/2023 eliminated this requirement for legal change, and trans identity is depathologized.
- “I have to be on hormone therapy for two years before surgery.” Prior hormone therapy may be recommended for some surgeries for clinical reasons, but it is not a universal legal requirement.
- “You have to have changed your legal sex on your ID card to have surgery.” No: the legal process and surgery are independent.
- “There is a maximum age for surgery.” There is no upper limit; what is assessed is health status, not age itself.
The Assessment Consultation: The Step That Truly Decides
Beyond general requirements, the key element is the initial medical assessment. In this consultation, the team reviews your history, health status, goals, and expectations, and from there defines which surgery suits you, what preparation you need, and under what conditions it can be performed.
It is also the time to resolve questions without obligation: how long the intervention lasts, what the post-operative period is like, what realistic results are, and what specific requirements apply in your case. No general information replaces this individual assessment, because the final requirements depend on each person and each procedure.
Resolve Your Requirements in a Free Initial Consultation
At Gender Medic, we are a unit with over 25 years of experience dedicated to gender affirmation, with a team of surgeons, endocrinologists, psychologists, sexologists, and pelvic floor physiotherapists who assess each case individually and support the entire process in an environment of trust, honesty, and safety. Surgeries are performed in a reference hospital, providing the security that entails.
If you want to know what requirements apply to your situation and which surgery suits you, the first advisory consultation is free. Whether you are looking for feminizing surgery or body masculinization, you can ask all your questions with the team before making any decision.
