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.

4.7

Excellent score

20 patient verified reviews

1 star

2 stars

3 stars

15%

4 stars

10%

5 stars

70%

Patient reviews

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1-5 of 20 reviews

Anonymous • Pancreatic cancer

Ukraine

Sep 26, 2019

Verified review.

the trip to the clinic was usually. I got advice, paid a doctor, translator and intermediary, did not receive receipts for these payments. But I don’t understand what the bonus actually consisted of, which I ordered through Bookimed and how to really get it. After this trip, I again received a letter about the bonus, but, in my opinion, these letters really do not cost anything.

About Bookimed service

As I wrote in the review, I did not understand what exactly the bonus promised by Bookimed was and how you can actually use it.

Ирина • Consultation rheumatologist

Kuwait

Oct 25, 2022

Verified review.

I was very satisfied with the level of the doctor's consultation, I hope the treatment will also be effective, but the organization wants the best. I've been waiting for a written doctor's opinion for a week now. Consultations and examinations did not follow the schedule.

About Bookimed service

Where are my examination results and the doctor’s conclusion?

Anonymous • Online Consultation with Oncologist

Romania

Mar 28, 2024

Verified review.

I had a terrible experience. Dr. Zielinski was dismissive and rushed me, he hasn't answered my questions and he asked me for more tests in order to speak about treatment plans when I was told previously that I didn't need any tests in order to proceed with the consultation and receive a treatment plan. He didn't bother to explain the disease or treatment options. I was looking forward to speak to him and I put so much hope. I needed someone to explain and guide me. I was left with such a bed feeling after the consultation. No empathy and no professionalism. Bookimed apologise but they said that they can't do anything because I paid directly the clinic, even if they are the intermediary they don't take responsibility, so be very careful when booking any services. I wasted 400 euros for 10 minutes that I was trying to make a few questions in order to get some value for the money but the only thing I got was disappointment, frustration, stress and time waste for arguing. I asked for at least to have some questions asked in writing so I could get something back for my money, but they refused, and they said that the consultation was compleated. In the first place, they said that I had a second consultation for free because it wasn't compleated, and then they said it was a mistake and the consultation was compleated. Please be careful where you spend your money and put your hopes because they don't care about taking advantage of ill people in order to make money. Probably are not all the same but my experience was awful and I am very disappointed. Some become doctors because they want to help people and others have no feelings or empathy. I hope this helps whoever is reading and I hope you find a better option than I did with a doctor that cares and will help you. God bless.

Karlo Tomašević • Consultation with a cardiologist

Croatia

Nov 11, 2023

Verified review.

A great advantage and relief is that before the actual payment and the continuation of the treatment, the doctor's CV is offered, it is not that you are forced to cooperate with a certain one

From the very beginning, things went smoothly, clearly and quickly. Very pleasant conversation, no waiting, clear information about payment and with, the outcome exactly as agreed. A great advantage and relief is that before the actual payment and the continuation of the treatment, the doctor's CV is offered, it is not that you are forced to cooperate with a certain one.

Easy communication and agreement

Client • Knee Arthroscopy

Romania

Jun 22, 2025

Verified review.

the core of it is the desire to help people who want to regain their health as much as possible back, the emotional intelligence and a necessary level of empathy and expertise which everyone from the clinic showed me

My opinion is that, even though it's a business the core of it is the desire to help people who want to regain their health as much as possible back, the emotional intelligence and a necessary level of empathy and expertise which everyone from the clinic showed me.

Interactions with the clinical staff.

About Bookimed service

Thanks to Bookimed I found the right clinic for fixing my health issue. The overall support and the informations given to me.

Doctor's services

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1 of 3

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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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