Please make an appointment with the medical centre through the SAF eHealth portal https://www.safhealth.gov.sg or through your Unit's Personnel Admin Centre. You can start the health screening process for the specified age from 3 months before your birthday for that age. While the Health Screening Programme (HSP) process is underway, the SAF Medical Officer may issue the serviceman with appropriate short-term medical excuses if necessary. If you need assistance to make appointment, please approach or call your Unit's Personnel Admin Centre for assistance. You can find the Personnel Admin Centres' contact numbers here https://www.ns.gov.sg/web/support/general/manage-medical-eHealth/Appointment-Bookings-and-Amendments/How-do-I-contact-my-Personnel-Admin-Centre-. Personnel Admin Centre will assist with your request(s.