The deadline to apply for Kaiser health insurance for Individuals and Families in California is the 23^rd of the month. However, underwriters get incredibly busy this time of the month, so I don’t recommend waiting until the last day. Those who apply on or around the deadline usually face delayed processing and may not find out about their approval until days beyond their effective date. Underwriting may take two to three weeks to notify you of your status after you apply. This may mean you end up paying for a certain amount of days of healthcare coverage that you never get the opportunity to use. The sooner you apply the more smoothly and quickly your application will go through underwriting and the sooner you will be notified of your approval status.