[Sign in](https://www.onedoc.ch/en/login) - [Search](https://www.onedoc.ch/en/) - [Sign in](https://www.onedoc.ch/en/login) * * * - [Cookies management](javascript:Didomi.preferences.show%28%29) - [Privacy center](https://privacy.onedoc.ch/en/) - [Help center](https://www.onedoc.ch) * * * - [I'm a healthcare professional](https://info.onedoc.ch/en/) - [About us](https://info.onedoc.ch/en/our-mission/) - [Health blog](https://myhealth.onedoc.ch/en/) - [Press](https://info.onedoc.ch/en/media/) - [Careers](https://career.onedoc.ch/en) - [DE](https://www.onedoc.ch/de/viszeralchirurg/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) - [FR](https://www.onedoc.ch/fr/chirurgien-visceral/saint-gall/pcxzw/prof-dr-med-andreas-thalheimer) - [IT](https://www.onedoc.ch/it/chirurgo-viscerale/san-gallo/pcxzw/prof-dr-med-andreas-thalheimer) - [EN](https://www.onedoc.ch/en/visceral-surgeon/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) [OneDoc](https://www.onedoc.ch/en/ "Back to home") - [Deutsch](https://www.onedoc.ch/de/viszeralchirurg/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) - [Français](https://www.onedoc.ch/fr/chirurgien-visceral/saint-gall/pcxzw/prof-dr-med-andreas-thalheimer) - [Italiano](https://www.onedoc.ch/it/chirurgo-viscerale/san-gallo/pcxzw/prof-dr-med-andreas-thalheimer) - [English](https://www.onedoc.ch/en/visceral-surgeon/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) - [Sign in](https://www.onedoc.ch/en/login) - [I am a practitioner](https://info.onedoc.ch/en/) - [*help\_outline*Help center](https://www.onedoc.ch) #### Help center close  ## Frequently asked questions My accountBook appointmentVideo consultationsMobile applicationMy appointments - [Impossible to create my OneDoc account](https://help.onedoc.ch/en/impossible-to-create-my-onedoc-account)  *open\_in\_new* - [Reset my password](https://help.onedoc.ch/en/reset-my-password)  *open\_in\_new* - [Reset my OneDoc account email address](https://help.onedoc.ch/en/reset-my-onedoc-account-email-address)  *open\_in\_new* - [Book an appointment with your doctor/therapist](https://help.onedoc.ch/en/book-an-appointment-with-your-doctor/therapist)  *open\_in\_new* - [Book an appointment by specialty](https://help.onedoc.ch/en/book-an-appointment-by-specialty)  *open\_in\_new* - [Book an appointment for someone else](https://help.onedoc.ch/en/book-an-appointment-for-someone-else)  *open\_in\_new* - [What is a OneDoc video consultation?](https://help.onedoc.ch/en/how-does-the-video-consultation-work)  *open\_in\_new* - [How to book an appointment for a video consultation?](https://help.onedoc.ch/en/search-for-remote-appointments)  *open\_in\_new* - [Download the OneDoc app](https://help.onedoc.ch/en/download-the-onedoc-app)  *open\_in\_new* - [Navigate the OneDoc app](https://help.onedoc.ch/en/navigate-the-onedoc-app)  *open\_in\_new* - [OneDoc app presentation](https://help.onedoc.ch/en/onedoc-app-presentation)  *open\_in\_new* - [Check if an appointment is confirmed](https://help.onedoc.ch/en/check-if-an-appointment-is-confirmed)  *open\_in\_new* - [Cancel an appointment booked online on OneDoc](https://help.onedoc.ch/en/cancel-an-appointment-booked-online-on-onedoc)  *open\_in\_new* - [I didn't receive my appointment confirmation](https://help.onedoc.ch/en/i-didnt-receive-my-appointment-confirmation)  *open\_in\_new* [See all our articles  *open\_in\_new*](https://help.onedoc.ch/en/)  *photo\_camera*+ 2 photos # Prof. Dr. med. Andreas Thalheimer  ## Visceral surgeon Summary Locations Map Presentation  ### Accepted patients Prof. Dr. med. Andreas Thalheimer accepts new patients  ### Specialties Visceral surgery  ### Expertises Gastric ring | gastric band Reflux check | Heartburn Bypass [*arrow\_drop\_down*View more](https://www.onedoc.ch)  ### Locations [ViszeraMed AG in Zürich](https://www.onedoc.ch/en/visceral-surgeon/zurich/pcxju/prof-dr-med-andreas-thalheimer) [Klinik Hirslanden Zürich in Zürich](https://www.onedoc.ch/en/visceral-surgeon/zurich/pcxzo/prof-dr-med-andreas-thalheimer) [DAZZ - Diabetes Adipositas Zentrum Zürich in Zollikon](https://www.onedoc.ch/en/visceral-surgeon/zollikon/pcxzs/prof-dr-med-andreas-thalheimer) [Adimed - Zentrum für Adipositas- und Stoffwechselmedizin Winterthur GmbH in Winterthur](https://www.onedoc.ch/en/visceral-surgeon/winterthur/pcxzu/prof-dr-med-andreas-thalheimer) Stoffwechselzentrum St. Gallen - friendlyDocs AG in St. Gallen [Spital Männedorf in Männedorf](https://www.onedoc.ch/en/visceral-surgeon/mannedorf/pcxzz/prof-dr-med-andreas-thalheimer)  ### Map and access information #### [Stoffwechselzentrum St. Gallen - friendlyDocs AG](https://www.onedoc.ch/en/medical-center/st-gallen/ebc67/stoffwechselzentrum-st-gallen-friendlydocs-ag) Lerchentalstrasse 21 9016 St. Gallen  ### Presentation of the healthcare professional ## __Prof. Dr. med. Andreas Thalheimer (MHBA)__ Bariatric surgery & functional upper abdominal surgery Prof. Dr. med. Andreas Thalheimer specializes in bariatric surgery and functional upper abdominal surgery. Bariatric surgery comprises surgical procedures for the treatment of severe obesity, including stomach reduction, gastric bypass surgery and revision surgery following previous procedures. The aim of these treatments is to improve long-term health and quality of life. Another focus is on diseases of the upper digestive tract. Functional upper abdominal surgery deals with reflux diseases, changes in the stomach and complex operations in the area of the oesophagus and diaphragm. The treatment of complex abdominal wall hernias is also part of his field of activity. Prof. Thalheimer has extensive experience in the surgical treatment of complex diseases of the upper digestive tract. In his daily work, he combines modern surgical procedures with individualized patient care. He uses open, laparoscopic and robotically assisted techniques, adapted to the respective medical situation. __Appointments with Prof. Dr. med. Andreas Thalheimer (MHBA) can be arranged online via OneDoc.__ [*arrow\_drop\_down*View more](https://www.onedoc.ch) [](https://assets.onedoc.ch/images/users/b98e89ba43010123b302c8db4e339c43d9cde08e421c1e55b7bd77d95fd0b330.png)[](https://assets.onedoc.ch/images/entities/f8b56b48d934ae214ba6f71291aee1f8a55e1dd44ca502ec1e55842c61c63369.png)[](https://assets.onedoc.ch/images/entities/0dea66c5752d51804d7b941da2faa5b30b63d54958e74880a14d4bbde9761e05.png) * * * #### Spoken languages German and English  ### FAQ *expand\_more* *keyboard\_arrow\_right* ## What are the addresses of Prof. Dr. med. Andreas Thalheimer? Prof. Dr. med. Andreas Thalheimer receives patients at the following addresses: - #### [ViszeraMed AG](https://www.onedoc.ch/en/group-practice/zurich/ebc1x/viszeramed-ag) Witellikerstrasse 40 8032 Zürich - #### [Klinik Hirslanden Zürich](https://www.onedoc.ch/en/hospital/zurich/ebc64/klinik-hirslanden-zurich) Witellikerstrasse 40 8032 Zürich - #### [DAZZ - Diabetes Adipositas Zentrum Zürich](https://www.onedoc.ch/en/medical-center/zollikon/ebc65/dazz-diabetes-adipositas-zentrum-zurich) Rietholzstrasse 4 8125 Zollikon - #### [Adimed - Zentrum für Adipositas- und Stoffwechselmedizin Winterthur GmbH](https://www.onedoc.ch/en/medical-center/winterthur/ebc66/adimed-zentrum-fur-adipositas-und-stoffwechselmedizin-winterthur-gmbh) Lagerhausstrasse 9 8400 Winterthur - #### [Stoffwechselzentrum St. Gallen - friendlyDocs AG](https://www.onedoc.ch/en/medical-center/st-gallen/ebc67/stoffwechselzentrum-st-gallen-friendlydocs-ag) Lerchentalstrasse 21 9016 St. Gallen - #### [Spital Männedorf](https://www.onedoc.ch/en/hospital/mannedorf/ebc68/spital-mannedorf) Asylstrasse 10 8708 Männedorf * * * *keyboard\_arrow\_right* ## What languages does Prof. Dr. med. Andreas Thalheimer speak? Prof. Dr. med. Andreas Thalheimer offers consultations in German and English. * * * *keyboard\_arrow\_right* ## What are Prof. Dr. med. Andreas Thalheimer's consulting hours? The consultation hours of Prof. Dr. med. Andreas Thalheimer are: - #### [ViszeraMed AG](https://www.onedoc.ch/en/group-practice/zurich/ebc1x/viszeramed-ag) : Witellikerstrasse 40, 8032 Zürich - On Monday closed - On Tuesday closed - On Wednesday from 08:00 to 12:00 and from 13:00 to 17:00 - On Thursday from 08:00 to 12:00 and from 13:00 to 17:00 - On Friday from 08:00 to 12:00 and from 13:00 to 17:00 - On Saturday closed - On Sunday closed * * * *keyboard\_arrow\_right* ## What are Prof. Dr. med. Andreas Thalheimer's phone numbers? The phone numbers of Prof. Dr. med. Andreas Thalheimer are: - ViszeraMed AG: [044 387 30 60](tel:+41443873060) - Klinik Hirslanden Zürich: [044 798 48 60](tel:+41447984860) - DAZZ - Diabetes Adipositas Zentrum Zürich: [044 798 48 60](tel:+41447984860) - Adimed - Zentrum für Adipositas- und Stoffwechselmedizin Winterthur GmbH: [044 798 48 60](tel:+41447984860) - Stoffwechselzentrum St. Gallen - friendlyDocs AG: [044 798 48 60](tel:+41447984860) - Spital Männedorf: [044 798 48 60](tel:+41447984860) * * * *keyboard\_arrow\_right* ## Does Prof. Dr. med. Andreas Thalheimer accept new patients? Yes, Prof. Dr. med. Andreas Thalheimer accepts new patients. New patients can easily book appointments online via OneDoc. * * * *keyboard\_arrow\_right* ## What are Prof. Dr. med. Andreas Thalheimer's specialties? Prof. Dr. med. Andreas Thalheimer performs [visceral surgery](https://www.onedoc.ch/en/visceral-surgeon/st-gallen) in St. Gallen. * * * *keyboard\_arrow\_right* ## What are Prof. Dr. med. Andreas Thalheimer's expertises? Prof. Dr. med. Andreas Thalheimer's expertises in St. Gallen are: [Gastric ring | gastric band](https://www.onedoc.ch/en/gastric-ring-gastric-band/st-gallen), [Reflux check | Heartburn](https://www.onedoc.ch/en/reflux-check-heartburn/st-gallen) and [Bypass](https://www.onedoc.ch/en/bypass/st-gallen). * * * *keyboard\_arrow\_right* ## What are the types of consultation offered by Prof. Dr. med. Andreas Thalheimer? Prof. Dr. med. Andreas Thalheimer consults for the following reasons: Visceral surgery: - Initial consultation - Follow-up consultation 1. [OneDoc](https://www.onedoc.ch/en/)/ 2. [Visceral surgeon](https://www.onedoc.ch/en/visceral-surgeon)/ 3. [Canton of St. Gallen](https://www.onedoc.ch/en/visceral-surgeon/canton-of-st-gallen)/ 4. [St. Gallen](https://www.onedoc.ch/en/visceral-surgeon/st-gallen)/ 5. Prof. Dr. med. Andreas Thalheimer ### Book your appointment with Prof. Dr. med. Andreas Thalheimer Fill in the below information *check* Location Stoffwechselzentrum St. Gallen - friendlyDocs AG Stoffwechselzentrum St. Gallen - friendlyDocs AG Select a location * * * 2 New patient? I'm a new patient I'm an established patient of Prof. Dr. med. Thalheimer * * * *touch\_app* Pick a time slot *chevron\_left* Sat 30 May *chevron\_right* View more appointments Time slot Book appointment ### Download the OneDoc app Book an appointment online with a doctor, dentist, or therapist near you in Switzerland. The OneDoc app lets you manage all your medical appointments from your smartphone, anytime and anywhere.  Scan the QR code to download the app [](https://apps.apple.com/ch/app/onedoc/id1592376413?l=fr)[](https://play.google.com/store/apps/details?id=ch.onedoc.patient&hl=fr-CH) *keyboard\_arrow\_right* ## Related specialties [Visceral surgeon in St. Gallen](https://www.onedoc.ch/en/visceral-surgeon/st-gallen) *keyboard\_arrow\_right* ## Related expertises [Gastric ring | gastric band in St. Gallen](https://www.onedoc.ch/en/gastric-ring-gastric-band/st-gallen)[Reflux check | Heartburn in St. Gallen](https://www.onedoc.ch/en/reflux-check-heartburn/st-gallen)[Reflux check | Heartburn in Horn](https://www.onedoc.ch/en/reflux-check-heartburn/horn)[Reflux check | Heartburn in Pfäffikon ZH](https://www.onedoc.ch/en/reflux-check-heartburn/pfaffikon?state=ZH)[Reflux check | Heartburn in Schaan](https://www.onedoc.ch/en/reflux-check-heartburn/LI:schaan)[Bypass in St. Gallen](https://www.onedoc.ch/en/bypass/st-gallen) *keyboard\_arrow\_right* ## Popular searches [General practitioner (GP) in St. Gallen](https://www.onedoc.ch/en/general-practitioner-gp/st-gallen)[Physiotherapist in St. Gallen](https://www.onedoc.ch/en/physiotherapist/st-gallen)[Physiotherapist in Abtwil SG](https://www.onedoc.ch/en/physiotherapist/abtwil?state=SG)[Specialist in general internal medicine in Frauenfeld](https://www.onedoc.ch/en/specialist-in-general-internal-medicine/frauenfeld)[Vaccination center in St. Gallen](https://www.onedoc.ch/en/vaccination-center/st-gallen)[General practitioner (GP) in Sargans](https://www.onedoc.ch/en/general-practitioner-gp/sargans)[Ophthalmologist in Pfäffikon ZH](https://www.onedoc.ch/en/ophthalmologist/pfaffikon?state=ZH)[Sports physiotherapist in Abtwil SG](https://www.onedoc.ch/en/sports-physiotherapist/abtwil?state=SG)[General practitioner (GP) in Müllheim](https://www.onedoc.ch/en/general-practitioner-gp/mullheim)[General practitioner (GP) in Uzwil](https://www.onedoc.ch/en/general-practitioner-gp/uzwil)[Orthopedic surgeon in St. Gallen](https://www.onedoc.ch/en/orthopedic-surgeon/st-gallen)[Ophthalmologist in Wetzikon](https://www.onedoc.ch/en/ophthalmologist/wetzikon)[Physiotherapist in Gossau SG](https://www.onedoc.ch/en/physiotherapist/gossau?state=SG)[OB-GYN (obstetrician-gynecologist) in Kreuzlingen](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/kreuzlingen)[General practitioner (GP) in Abtwil SG](https://www.onedoc.ch/en/general-practitioner-gp/abtwil?state=SG)[OB-GYN (obstetrician-gynecologist) in St. Gallen](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/st-gallen)[Ophthalmologist in Weinfelden](https://www.onedoc.ch/en/ophthalmologist/weinfelden)[Pharmacy health services in St. Gallen](https://www.onedoc.ch/en/pharmacy-health-services/st-gallen)[OB-GYN (obstetrician-gynecologist) in Frauenfeld](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/frauenfeld)[OB-GYN (obstetrician-gynecologist) in Wetzikon](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/wetzikon)[General practitioner (GP) in Wetzikon](https://www.onedoc.ch/en/general-practitioner-gp/wetzikon) *keyboard\_arrow\_right* ## Find practitioners [Practitioners directory](https://www.onedoc.ch/en/directory) [A](https://www.onedoc.ch/en/directory/A) [B](https://www.onedoc.ch/en/directory/B) [C](https://www.onedoc.ch/en/directory/C) [D](https://www.onedoc.ch/en/directory/D) [E](https://www.onedoc.ch/en/directory/E) [F](https://www.onedoc.ch/en/directory/F) [G](https://www.onedoc.ch/en/directory/G) [H](https://www.onedoc.ch/en/directory/H) [I](https://www.onedoc.ch/en/directory/I) [J](https://www.onedoc.ch/en/directory/J) [K](https://www.onedoc.ch/en/directory/K) [L](https://www.onedoc.ch/en/directory/L) [M](https://www.onedoc.ch/en/directory/M) [N](https://www.onedoc.ch/en/directory/N) [O](https://www.onedoc.ch/en/directory/O) [P](https://www.onedoc.ch/en/directory/P) [Q](https://www.onedoc.ch/en/directory/Q) [R](https://www.onedoc.ch/en/directory/R) [S](https://www.onedoc.ch/en/directory/S) [T](https://www.onedoc.ch/en/directory/T) [U](https://www.onedoc.ch/en/directory/U) [V](https://www.onedoc.ch/en/directory/V) [W](https://www.onedoc.ch/en/directory/W) [X](https://www.onedoc.ch/en/directory/X) [Y](https://www.onedoc.ch/en/directory/Y) [Z](https://www.onedoc.ch/en/directory/Z) ## OneDoc [I'm a healthcare professional](https://info.onedoc.ch/en/) [About us](https://info.onedoc.ch/en/our-mission/) [Press](https://info.onedoc.ch/en/media/) [Careers](https://career.onedoc.ch/en) [Health blog](https://myhealth.onedoc.ch/en/) [Privacy center](https://privacy.onedoc.ch/en/) [Cookies management](javascript:Didomi.preferences.show%28%29) [Help center](https://help.onedoc.ch/en/) ## Languages [Deutsch](https://www.onedoc.ch/de/viszeralchirurg/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) [Français](https://www.onedoc.ch/fr/chirurgien-visceral/saint-gall/pcxzw/prof-dr-med-andreas-thalheimer) [Italiano](https://www.onedoc.ch/it/chirurgo-viscerale/san-gallo/pcxzw/prof-dr-med-andreas-thalheimer) [English](https://www.onedoc.ch/en/visceral-surgeon/st-gallen/pcxzw/prof-dr-med-andreas-thalheimer) ## Related specialties [Visceral surgeon in St. Gallen](https://www.onedoc.ch/en/visceral-surgeon/st-gallen) ## Related expertises [Gastric ring | gastric band in St. Gallen](https://www.onedoc.ch/en/gastric-ring-gastric-band/st-gallen) [Reflux check | Heartburn in St. Gallen](https://www.onedoc.ch/en/reflux-check-heartburn/st-gallen) [Reflux check | Heartburn in Horn](https://www.onedoc.ch/en/reflux-check-heartburn/horn) [Reflux check | Heartburn in Pfäffikon ZH](https://www.onedoc.ch/en/reflux-check-heartburn/pfaffikon?state=ZH) [Reflux check | Heartburn in Schaan](https://www.onedoc.ch/en/reflux-check-heartburn/LI:schaan) [Bypass in St. Gallen](https://www.onedoc.ch/en/bypass/st-gallen) ## Popular searches [General practitioner (GP) in St. Gallen](https://www.onedoc.ch/en/general-practitioner-gp/st-gallen) [Physiotherapy in St. Gallen](https://www.onedoc.ch/en/physiotherapist/st-gallen) [Physiotherapy in Abtwil SG](https://www.onedoc.ch/en/physiotherapist/abtwil?state=SG) [Specialist in general internal medicine in Frauenfeld](https://www.onedoc.ch/en/specialist-in-general-internal-medicine/frauenfeld) [Vaccination center in St. Gallen](https://www.onedoc.ch/en/vaccination-center/st-gallen) [General practitioner (GP) in Sargans](https://www.onedoc.ch/en/general-practitioner-gp/sargans) [Ophthalmologist in Pfäffikon ZH](https://www.onedoc.ch/en/ophthalmologist/pfaffikon?state=ZH) [Sports physiotherapist in Abtwil SG](https://www.onedoc.ch/en/sports-physiotherapist/abtwil?state=SG) [General practitioner (GP) in Müllheim](https://www.onedoc.ch/en/general-practitioner-gp/mullheim) [General practitioner (GP) in Uzwil](https://www.onedoc.ch/en/general-practitioner-gp/uzwil) [Orthopedic surgeon in St. Gallen](https://www.onedoc.ch/en/orthopedic-surgeon/st-gallen) [Ophthalmologist in Wetzikon](https://www.onedoc.ch/en/ophthalmologist/wetzikon) [Physiotherapy in Gossau SG](https://www.onedoc.ch/en/physiotherapist/gossau?state=SG) [OB-GYN (obstetrician-gynecologist) in Kreuzlingen](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/kreuzlingen) [General practitioner (GP) in Abtwil SG](https://www.onedoc.ch/en/general-practitioner-gp/abtwil?state=SG) [OB-GYN (obstetrician-gynecologist) in St. Gallen](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/st-gallen) [Ophthalmologist in Weinfelden](https://www.onedoc.ch/en/ophthalmologist/weinfelden) [Pharmacy health services in St. Gallen](https://www.onedoc.ch/en/pharmacy-health-services/st-gallen) [OB-GYN (obstetrician-gynecologist) in Frauenfeld](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/frauenfeld) [OB-GYN (obstetrician-gynecologist) in Wetzikon](https://www.onedoc.ch/en/ob-gyn-obstetrician-gynecologist/wetzikon) [General practitioner (GP) in Wetzikon](https://www.onedoc.ch/en/general-practitioner-gp/wetzikon) [](https://facebook.com/onedoc.ch/)[](https://linkedin.com/company/onedoc.ch/)[](https://www.instagram.com/onedoc.ch/)[](https://twitter.com/OneDoc_ch)[](https://www.youtube.com/channel/UCWnlE63em_m8ZioBA5n8Z6w) Find practitioners [Practitioners directory](https://www.onedoc.ch/en/directory)[A](https://www.onedoc.ch/en/directory/a)[B](https://www.onedoc.ch/en/directory/b)[C](https://www.onedoc.ch/en/directory/c)[D](https://www.onedoc.ch/en/directory/d)[E](https://www.onedoc.ch/en/directory/e)[F](https://www.onedoc.ch/en/directory/f)[G](https://www.onedoc.ch/en/directory/g)[H](https://www.onedoc.ch/en/directory/h)[I](https://www.onedoc.ch/en/directory/i)[J](https://www.onedoc.ch/en/directory/j)[K](https://www.onedoc.ch/en/directory/k)[L](https://www.onedoc.ch/en/directory/l)[M](https://www.onedoc.ch/en/directory/m)[N](https://www.onedoc.ch/en/directory/n)[O](https://www.onedoc.ch/en/directory/o)[P](https://www.onedoc.ch/en/directory/p)[Q](https://www.onedoc.ch/en/directory/q)[R](https://www.onedoc.ch/en/directory/r)[S](https://www.onedoc.ch/en/directory/s)[T](https://www.onedoc.ch/en/directory/t)[U](https://www.onedoc.ch/en/directory/u)[V](https://www.onedoc.ch/en/directory/v)[W](https://www.onedoc.ch/en/directory/w)[X](https://www.onedoc.ch/en/directory/x)[Y](https://www.onedoc.ch/en/directory/y)[Z](https://www.onedoc.ch/en/directory/z) [](https://www.swissmadesoftware.org)  Copyright © 2026 OneDoc SA Adimed - Zentrum für Adipositas- und Stoffwechselmedizin Winterthur GmbH DAZZ - Diabetes Adipositas Zentrum Zürich Klinik Hirslanden Zürich Spital Männedorf Stoffwechselzentrum St. Gallen - friendlyDocs AG ViszeraMed AG