More and more patients from Germany, the UK, the Gulf region and the rest of Europe are looking into stem cell therapy in Bulgaria. Sofia offers modern medical facilities, short flights from most European cities and lower costs than many Western clinics. But the decision to travel for a regenerative treatment should never be based on price or promises alone. This guide explains how stem cell treatment in Europe is regulated, which conditions are studied, what it may cost, and how to choose a safe stem cell clinic.
What is stem cell therapy?
Stem cell therapy uses cells that can renew themselves and support the repair of tissues. In regenerative medicine, the most widely studied type is mesenchymal stem cells (MSCs), which can be obtained from bone marrow, fat tissue or the umbilical cord. Their main effect is thought to come from the signals they release, which can reduce inflammation, modulate the immune system and support the body's own repair processes, rather than from directly replacing damaged tissue.
Other approaches include bone marrow concentrate (BMAC), and, in research settings, cells derived from induced pluripotent stem cells (iPSCs). Platelet-rich plasma (PRP) is sometimes marketed as a "stem cell" treatment, but it does not contain stem cells.
Is stem cell therapy legal in Europe and Bulgaria?
Bulgaria is a member of the European Union, so the same European rules apply as in Germany, Austria or France. Under EU law, cells that are substantially processed in a laboratory, or used for a different function than in their original tissue, are classified as Advanced Therapy Medicinal Products (ATMPs). These can be used:
after approval by the European Medicines Agency (EMA),
within an authorised clinical trial, or
under the so-called hospital exemption, on a non-routine basis, under the responsibility of a physician and with national authorisation.
It is important to know that, apart from established treatments such as blood stem cell (bone marrow) transplantation for blood cancers, very few stem cell products are approved in Europe. Most applications for orthopaedic, neurological or autoimmune conditions are still being studied. A responsible clinic will explain clearly under which framework a treatment is offered.
Which conditions are studied with stem cell treatment?
Orthopaedic conditions: knee osteoarthritis, cartilage damage, osteonecrosis of the hip and tendon injuries. Knee osteoarthritis has the largest number of randomised trials.
Autoimmune diseases: including multiple sclerosis, rheumatoid arthritis and Crohn's disease, where cells are studied for their effect on the immune system.
Neurological conditions: such as stroke recovery, spinal cord injury, Parkinson's disease, cerebral palsy and autism spectrum disorder, mostly in early-phase studies.
Eye diseases: including optic nerve atrophy and certain retinal diseases.
Diabetes and its complications, such as diabetic foot ulcers.
For each of these, the strength of the evidence differs. Results depend on the diagnosis, the stage of the disease, the type of cells and the patient's overall health. No honest clinic can guarantee a cure.
How much does stem cell therapy cost in Europe?
The cost of stem cell therapy varies widely, and a reliable price can only be given after a medical review. The main factors are:
the type and source of the cells and how they are prepared in the laboratory,
the number of cells and the number of treatment sessions,
the route of administration, for example a joint injection or an intravenous infusion,
pre-treatment tests, hospital stay and follow-up,
travel, accommodation and interpreter services.
Be cautious with clinics that quote a fixed price online before seeing any medical records. A written, itemised offer after your assessment is the standard you should expect.
How to choose a stem cell clinic: 8 questions to ask
Which type of cells will be used, where do they come from, and in which laboratory are they prepared and tested?
Under which legal framework is the treatment offered?
Which published studies support this treatment for my condition?
How many cells will I receive, and how was this dose chosen?
What are the possible side effects and complications?
What results are realistic, and what cannot be promised?
Who is the treating physician, and what are their qualifications?
What follow-up is included after I return home?
Red flags
Guaranteed results or "cures" for serious diseases.
One treatment offered for almost every condition.
No review of your medical records before a price is quoted.
Pressure to book quickly or pay large deposits before an assessment.
No information about the laboratory or the doctors.
What to expect: the treatment process step by step
1. Medical records review: you send your diagnosis, recent scans (MRI, CT, X-ray) and laboratory results.
2. Medical assessment: the medical team decides whether a regenerative approach is reasonable for your condition, or whether another option is better.
3. Written plan: you receive an explanation of the proposed programme, the realistic goals, the risks, the timeline and the costs.
4. Treatment in Sofia: usually a short stay, with pre-treatment checks on arrival.
5. Follow-up: online check-ups and, where needed, repeat tests after you return home.
Why patients choose Sofia, Bulgaria
EU member state, with European medical regulations.
Direct flights from many European cities and good connections from the Gulf region.
Shorter waiting times and lower overall costs than in many Western European countries.
English-speaking doctors and coordinators, with patient information in Arabic, Russian and Spanish.
Frequently asked questions
Is stem cell therapy safe?
In controlled clinical studies, mesenchymal stem cell treatments have generally shown a good safety profile, with mostly mild, temporary side effects. Safety depends heavily on the laboratory, the preparation of the cells and the medical setting, which is why choosing the right clinic matters.
How long does a stem cell treatment take?
The treatment itself often takes one or a few days. Any improvement, if it occurs, usually develops gradually over weeks to months.
Can I do the medical assessment before travelling?
Yes. At Regenova BioTech, your medical records are reviewed remotely and free of charge before any travel is planned.
Does health insurance cover stem cell therapy?
In most cases, no, because most applications are not yet part of standard, approved care. Check with your insurer before making any commitment.
Stem cell therapy at Regenova BioTech in Sofia
Regenova BioTech is a regenerative medicine clinic in Sofia, Bulgaria, working with a laboratory partner in Graz, Austria. Every programme starts with an individual medical review, not a sales offer. Learn more about the conditions we assess, our medical team and our licences and certificates.
Send your medical reports for a free, no-obligation assessment via WhatsApp at +49 176 5689 1000 or through our contact form.
This article is for general information and does not replace individual medical advice. Medically reviewed by Dr. Younis Yaseen, Medical Director, Regenova BioTech.
References
Regulation (EC) No 1394/2007 of the European Parliament and of the Council on advanced therapy medicinal products.
European Medicines Agency. Advanced therapy medicinal products: overview.
Rahmadian R, et al. Efficacy of a single intra-articular injection of mesenchymal stem cells for knee osteoarthritis: a dose-focused meta-analysis of randomized controlled trials. J Orthop Surg Res. 2025;20:812.
