At this time, Flex does not support splitting a payment across multiple HSA or FSA cards.
However, you can complete your purchase using a personal credit or debit card instead. After checkout, you’ll receive an itemized receipt—and if applicable, a Letter of Medical Necessity (LMN)—which you can use to submit a reimbursement claim through your HSA/FSA provider.
If you have questions about submitting a claim or need help locating your receipt, please reach out to us at support@withflex.com, we’re happy to assist!