The Team in Zurich


Dr. Ragg angioclinic® Zürich

Dr Johann C. Ragg | Chief of Medicine

Dr Ragg is an internationally renowned expert in vascular medicine with an incomparable wealth of experience from more than 100,000 operations. He is the founder and chief physician of the angioclinic® Vein Centers in Berlin, Munich and Zurich. As a physician and physicist, he has been active in the development of new diagnostic and therapeutic procedures for 25 years. The main objectives of his interventions are reliability, painlessness and success in line with the guarantee.



Dr Sebastian Kreis | Head Physician

Dr Sebastian Kreis is a general practitioner and specialist in general medicine with a doctorate in phlebology. He has been working together with Dr Ragg academically for many years. Dr Kreis is specialized in ultrasound diagnostics, especially of veins and arteries, and specializes in consulting and differential diagnostics (internal medicine).

Dr. Kreis holds DEGUM Level I certification for ultrasound diagnostics in the fields of internal medicine and general medicine. Prior to this, Dr. Kreis worked for five years at the Center da sandà Val Müstair (CSVM) in Graubünden, most recently as senior physician.


Simon Grzelachowski angioclinic®

Simon Grzelachowski | Phlebology Assistant

Simon Grzelachowski is a phlebology assistant and a medical assistant. He masters all diagnostic procedures and completed his training at the "Phlebological Training Academy" of the German Society for Phlebology.

Simon Grzelachowski is the angioclinic® trainer for newly qualifying doctors. He also specializes in organizing operations and quality management. Simon Grzelachowski supports the angioclinic® teams in Berlin, Munich and Zurich.


Birgit Marquardt angioclinic®

Birgit Marquardt | Member of the Executive Board

Birgit Marquardt has been a member of the angioclinic® Vein Centres management since 2005. In Zurich she has been looking after individual patient wishes and organising quality control since 2010.

Activities: patient, clinic and quality management



angioclinic® Vein Center
Dr Ragg Zurich

Seestrasse 455b

CH - 8038 Zürich

Phone 044 482 30 30
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

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