[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/) - [Press](https://info.onedoc.ch/en/media/) - [Careers](https://career.onedoc.ch/en) - [DE](https://www.onedoc.ch/de/gruppenpraxis/sirnach/ebfre/ona-derm-ostschweiz-ag) - [FR](https://www.onedoc.ch/fr/cabinet-de-groupe/sirnach/ebfre/ona-derm-ostschweiz-ag) - [IT](https://www.onedoc.ch/it/studio-medico-associato/sirnach/ebfre/ona-derm-ostschweiz-ag) - [EN](https://www.onedoc.ch/en/group-practice/sirnach/ebfre/ona-derm-ostschweiz-ag) [OneDoc](https://www.onedoc.ch/en/ "Back to home") - [Deutsch](https://www.onedoc.ch/de/gruppenpraxis/sirnach/ebfre/ona-derm-ostschweiz-ag) - [Français](https://www.onedoc.ch/fr/cabinet-de-groupe/sirnach/ebfre/ona-derm-ostschweiz-ag) - [Italiano](https://www.onedoc.ch/it/studio-medico-associato/sirnach/ebfre/ona-derm-ostschweiz-ag) - [English](https://www.onedoc.ch/en/group-practice/sirnach/ebfre/ona-derm-ostschweiz-ag) - [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/) # ONA Derm Ostschweiz AG  ## Group practice Map Presentation Team  ### Accepted patients ONA Derm Ostschweiz AG accepts new patients  ### Specialties Dermatology and venereology [*arrow\_drop\_down*View more](https://www.onedoc.ch)  ### Expertises Aesthetic laser Botulinum toxin injection Skin check [*arrow\_drop\_down*View more](https://www.onedoc.ch)  ### Map and access information #### ONA Derm Ostschweiz AG Lenzbüel 17 8370 Sirnach #### Opening hours Currently closed - Opens Monday at 07:30 *expand\_more* Monday: 07:30 - 18:00 Tuesday: 07:30 - 18:00 Wednesday: 07:30 - 18:00 Thursday: 07:30 - 18:00 Friday: 07:30 - 18:00 Saturday: Closed Sunday: Closed #### ONA Derm [Unsere Standorte](https://www.onedoc.ch/en/dermatologie-klinik/gdwh/ona-derm "Unsere Standorte - ONA Derm")  ### Presentation of the institution At ONA Derm, the health and well-being of your skin are our top priority. We combine modern medical dermatology, specialized dermatological surgery, and professional aesthetic treatments all under one roof. Our experienced team treats the full spectrum of dermatological conditions—from acne, rosacea, and eczema to psoriasis, allergic skin conditions, and disorders affecting the hair and nails. We also place a special emphasis on the diagnosis and treatment of skin cancer, as well as on modern dermatosurgical procedures, including Mohs surgery. In addition, we offer a comprehensive range of services in the field of medical cosmetics and aesthetic dermatology. Our focus is on skin care, regeneration, and improving the skin’s appearance. Our treatments are individually tailored to the needs and wishes of our patients. We place great importance on personalized care, thorough diagnostics, and treatment in accordance with modern medical standards. Our goal is to provide you with competent, holistic, and long-term care for your skin. [*arrow\_drop\_down*View more](https://www.onedoc.ch) [](https://assets.onedoc.ch/images/entities/2707a8038705050c9e27cf2800676c1bf365c6d3a5221878f8903b412b6601f3.png)  ### Team Dermatologists [ \ __Dr. med. Mouatasem Jida__](https://www.onedoc.ch/en/dermatologist/sirnach/pc48e/dr-med-mouatasem-jida) [ \ __Dr. med. Piotr Michel__](https://www.onedoc.ch/en/dermatologist/sirnach/pc5ck/dr-med-piotr-michel) [ \ __Dr. med. Victoria Mortasawi__](https://www.onedoc.ch/en/dermatologist/sirnach/pc48d/dr-med-victoria-mortasawi)  ### FAQ *expand\_more* *keyboard\_arrow\_right* ## What is the address of ONA Derm Ostschweiz AG? ONA Derm Ostschweiz AG receives patients at Lenzbüel 17, 8370 Sirnach. * * * *keyboard\_arrow\_right* ## What are ONA Derm Ostschweiz AG's hours of operation? ONA Derm Ostschweiz AG is open: - On Monday from 07:30 to 18:00 - On Tuesday from 07:30 to 18:00 - On Wednesday from 07:30 to 18:00 - On Thursday from 07:30 to 18:00 - On Friday from 07:30 to 18:00 - On Saturday closed - On Sunday closed * * * *keyboard\_arrow\_right* ## What is ONA Derm Ostschweiz AG's phone number? The phone number of ONA Derm Ostschweiz AG is [058 255 00 75](tel:+41582550075). * * * *keyboard\_arrow\_right* ## What are the specialties practiced at ONA Derm Ostschweiz AG? ONA Derm Ostschweiz AG offers consultations of [Dermatology and venereology](https://www.onedoc.ch/en/dermatologist/sirnach). * * * *keyboard\_arrow\_right* ## What are ONA Derm Ostschweiz AG's expertises? ONA Derm Ostschweiz AG's expertises are: [Aesthetic laser](https://www.onedoc.ch/en/aesthetic-laser/sirnach), [Botulinum toxin injection](https://www.onedoc.ch/en/botulinum-toxin-injection/sirnach) and [Skin check](https://www.onedoc.ch/en/skin-check/sirnach). * * * *keyboard\_arrow\_right* ## Does ONA Derm Ostschweiz AG accept new patients? Yes, ONA Derm Ostschweiz AG accepts new patients. New patients can easily book appointments online via OneDoc. * * * *keyboard\_arrow\_right* ## What languages are spoken at ONA Derm Ostschweiz AG? ONA Derm Ostschweiz AG offers consultations in German, English and Polish. 1. [OneDoc](https://www.onedoc.ch/en/)/ 2. [Group practice](https://www.onedoc.ch/en/group-practice)/ 3. [Canton of Thurgau](https://www.onedoc.ch/en/group-practice/canton-of-thurgau)/ 4. [Sirnach](https://www.onedoc.ch/en/group-practice/sirnach)/ 5. ONA Derm Ostschweiz AG ### Book your appointment with ONA Derm Ostschweiz AG Fill in the below information *check* Specialty Dermatology and venereology Dermatology and venereology Select a specialty * * * 2 New patient? I'm a new patient I'm an established patient in the practice for this specialty * * * *touch\_app* Pick a time slot *chevron\_left* Fri 11 Sep *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.  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