Klaus Kaczirek

years of experience

Klaus Kaczirek

Specialization: General surgeon
25 years of experience
accreditation:
Speaks:
German, English
Workplace: Austria, Vienna, Wiener Privatklinik
Deputy Head of the Department of General Surgery at Vienna General Hospital (AKH)
The doctor is a leading Austrian endocrine and oncologic surgeon, internationally recognized for expertise in thyroid, parathyroid, and adrenal gland surgery, as well as neuroendocrine tumors. With over three decades of experience, the doctor has been instrumental in establishing Vienna as a key center for endocrine surgery.
Graduating from the University of Vienna in the 1980s, the doctor completed a residency in general and visceral surgery, later specializing in endocrine surgery. The doctor has served as Professor of Surgery and Deputy Head of the Department of General Surgery at Vienna General Hospital, focusing on endocrine tumors and advanced laparoscopic surgery.
The doctor has published extensively on endocrine tumor biology and minimally invasive surgery, contributing to international treatment standards and mentoring young surgeons.

4.6

Excellent score

20 patient verified reviews

1 star

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3 stars

15%

4 stars

10%

5 stars

65%

Patient reviews

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1-5 of 20 reviews

Anonymous • CT scan of the whole body

Slovenia

Jun 2, 2026

Verified review.

Given how positive my experience was, I would definitely recommend this clinic to anyone needing similar care

My biggest concern was the anxiety around getting a full-body CT scan, but that worry disappeared quickly. From the moment I walked in, the staff made me feel comfortable and explained every single step, which was incredibly reassuring. The clinic was clean and organized, and the medical team was both professional and genuinely kind throughout the entire process. Everything went smoothly. Given how positive my experience was, I would definitely recommend this clinic to anyone needing similar care. I'm grateful for how they handled my case with such efficiency and compassion.

Nothing

Anonymous • PET/CT

Ukraine

May 15, 2026

Verified review.

My experience has been entirely negative. The treatment prescribed did not follow the standard protocol for this condition. Under this treatment, the condition only worsened. I was given information about the most effective treatment currently used worldwide. I never received the doctor’s conclusion following the consultation, even though I asked for it several times. And on top of everything else, judging by the result, it wasn’t worth €500. A treatment that doesn’t work, with no documentation whatsoever. Just a conversation with a professor to whom you have to ask a thousand questions and figure out the treatment options for your condition yourself, because he offers nothing and explains nothing.

Speed of service delivery

The treatment recommended by the professor at the Austrian clinic was completely at odds with standard treatment protocols I never received the discharge summary, even though I had asked for it several times

Tetyana • Metastases in the liver

Ukraine

Apr 19, 2026

Verified review.

Anonymous • Male Check-up

Poland

Apr 3, 2026

Verified review.

I’m glad I chose to come here

It was the right decision. Right from the start, I felt that they were looking after me, from the organisation of the trip right through to the clinic itself. The staff were incredibly attentive and supportive every step of the way. Special thanks to the doctor, who explained everything very patiently and clearly, dispelling any doubts I had. The clinic is clean and modern. The examination itself went smoothly and without any unnecessary stress. I’m glad I chose to come here.

Very nice admin and over qualification doctor. I hope my dream will come true and I do my plastic surgery

Anonymous • Otoplasty (ear surgery)

Austria

Oct 27, 2025

Verified review.

It was performed by the very best doctor, Igor Pona

I had an operation on 16 October 2025. It was performed by the very best doctor, Igor Pona. The procedure was an otoplasty. I really liked the clinic where the operation took place.The clinic’s medical staff were always there for me and kept asking how I was feeling. I am also very grateful to the staff at Bookimed for arranging transport. They took me to the clinic for the operation and brought me home afterwards.I am very pleased with the results of my surgery, three months on. I am very grateful to Dr Egor Pona, and indeed to the entire staff at the Bookimed clinic.

I had an otoplasty in October 2025. It’s been three months and a week, and the results are fantastic. I am delighted with the result. I would like to thank Bookimed Clinic. I specifically asked the clinic staff for a Russian-speaking doctor; the clinic replied the very next day and informed me that they had a Russian-speaking doctor available. I was given an appointment with the doctor about a week later. The staff at Bookimed Clinic were in constant contact with me. They were incredibly supportive. They kept asking how I was getting on and how I was feeling. They told me not to worry and that everything would be fine.

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Certifications & accreditations

European Society of Endocrine Surgeons

Qualifications

Univ. Prof. Dr. Klaus Kaczirek is a leading Austrian endocrine and oncologic surgeon, internationally recognized for his expertise in thyroid, parathyroid, and adrenal gland surgery, as well as neuroendocrine tumors. With a career spanning more than three decades, he has played a key role in establishing Vienna as one of Europe’s foremost centers for endocrine surgery.

He studied medicine at the University of Vienna, where he graduated in the 1980s, and completed his residency in general and visceral surgery at the Medical University of Vienna. Early in his career, he focused on endocrine and metabolic disorders, developing refined surgical approaches for complex thyroid and adrenal diseases.

1980s – Completed medical studies and began residency in general and visceral surgery.

1990s – Specialized in endocrine surgery, performing thyroidectomy, parathyroid surgery, and adrenal gland resections.

2000s – Appointed Professor of Surgery at the Medical University of Vienna, contributing to research in neuroendocrine and thyroid malignancies.

2010s – Served as Deputy Head of the Department of General Surgery at Vienna General Hospital (AKH), leading clinical innovation and education in endocrine and oncologic surgery.

Today – Practices as senior consultant at Wiener Privatklinik and the Medical University of Vienna, focusing on endocrine tumors, hormone-producing cancers, and advanced laparoscopic endocrine surgery.

Prof. Kaczirek has published extensively on endocrine tumor biology, minimally invasive surgery, and long-term outcomes of thyroid and adrenal operations, contributing to the development of international treatment standards. He is also actively involved in clinical trials and medical education, mentoring young surgeons in Vienna and abroad.

Renowned for his technical mastery, diagnostic precision, and empathetic approach, Prof. Kaczirek combines surgical innovation with academic rigor. His work continues to shape the evolution of endocrine oncology and metabolic surgery, setting new benchmarks in safety, precision, and patient-centered care.

Klaus Kaczirek

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