# Day Unit, Meilahti Triangle Hospital Keywords: - [Day Hospital](< /en/search?q=Day Hospital >) - [Meilahti Triangle Hospital](< /en/search?q=Meilahti Triangle Hospital >) The Day Unit treats certain patient groups in various specialties, by appointment and according to preplanned treatment processes. The outpatient clinic or inpatient ward in the relevant specialty is responsible for planning your treatment, for booking appointments and for providing you with guidance before the planned treatment. We perform procedures in the Day Unit's procedure rooms or sometimes at the Endoscopy Unit, at the Cardiac Evaluation Unit, in an operating room, in a recovery room, or at an X-ray unit. ## [ Maisa Portal (opens in new window, links to another website) ](https://www.maisa.fi/maisa/Authentication/Login?lang=britishenglish) MAISA.FI You can use our online services by signing in to the Maisa Portal. Once your treatment with us begins, you will receive information on the services you can access in Maisa. These include appointment booking and preliminary information forms, for example. Click here to go to Maisa’s sign-in page  ## [ Patient Guide ](/en/patient/patient-guide) The Patient Guide site answer the most common questions you might have before, during, and after treatment. See Patient Guide site here  ## Contact information and opening hours #### Visiting address Meilahti Triangle Hospital Haartmaninkatu 4 Helsinki #### Postal address P.O. Box 340 00290 Helsinki ### Phone number [ Phone, Phone number: 09 471 77510 ]() ### Fax [ Phone, Fax: 09 471 74639 ]() #### Opening hours Mon–Fri 7:00–20:00 Exceptions to opening hours Patients’ calls during their specialty’s telephone hours. ## Find us here ### [ Meilahti Triangle Hospital ](/en/patient/hospitals-and-other-units/meilahti-triangle-hospital)  ## Specialists ### [ Timi Martelius ](/en/person/timi-martelius) Chief Physician Infectious Diseases Outpatient Clinic, Meilahti Triangle Hospital ### [ Ira Pipatti ](/en/person/ira-pipatti) Nurse Manager Inflammation Center Rheumatology Outpatient Clinic and Day Hospital, Meilahti Triangle Hospital Updated: 19.12.2025 Print this page