The procedure is to fill in the leave form and give it to the supervisor. This instruction applies to all military personnel assigned to Naval Medical Center San Diego.(NMCSD) . 4. Background. A sample letter explaining the continuation of health insurance benefits during a military related absence. If you have a service-connected condition, you can file a claim for disability benefits 180 to 90 days before you leave the military. Visit Get free tax help 14 for more information. In this article, we offer several tips to help you compose a professional leave of absence request that appropriately addresses you and your employer's needs. You can file a claim for disability benefits 180 to 90 days before you leave the military. Receiving week is 3–5 days processing to prepare recruits for their first day of actual Marine training.