Change of outpatient facility can be done through NHIF self-care portal or Safaricom SSD code *155#. Change of facility takes place twice in a year. That is January and July.
If you change your outpatient hospital on June 2021, you can use it from 1st July 2021.
For example, if you change your facility between January and June 2021, you will be able to use the hospital from 1st July 2021. If you change the facility between July and December 2021, you will able to use it from 1st January 2021.