So your spouse has an HSA, and you want to jump in and use some of that benefit.
Health Savings Accounts (HSAs) are for qualified medical expenses. The good news is that you, your spouse, and dependents you claim on your tax return can all incur qualified expenses and use the HSA towards them.
Remember, you do have to be on a qualified High Deductible Health Plan (HDHP) to contribute to an HSA. Once the money is there, you can use it regardless of what health plan you have (or don’t have).