HSA/FSA Eligibility

Use your Health Savings Account (HSA) or Flexible Spending Account (FSA) debit card to buy ZIIP products with pre-tax dollars

  1. 1. Add your ZIIP products to the cart
  2. 2. At checkout, under “Payment”, select “Flex” as a payment method.
  3. 3. Fill out the form and enter your HSA or FSA debit card details to complete your checkout.
  4. 4. If you qualify, Flex will send you a Letter of Medical Necessity, valid for 12 months, via email within 24 hours.

Got a question?

What is an FSA or HSA and what are the benefits? +

An FSA (Flexible Spending Account) and an HSA (Health Savings Account) are tax-advantaged accounts for medical expenses but differ in key aspects.

FSAs, employer-sponsored, allow employees to use pre-tax dollars for medical expenses such as prescriptions and copays, but typically feature a "use-it-or-lose-it" policy where funds must be used within the plan year.

HSAs are available to those with a high-deductible health plan and offer more flexibility, allowing funds to roll over annually.

For more information, see Flex’s Comprehensive Guide to HSA/FSAs.

What is a Letter of Medical Necessity? (LMN) +

A Letter of Medical Necessity (LMN) is a document written by a healthcare provider that explains why a specific medical service, treatment, or equipment is necessary for a patient's health.

In relation to an HSA (Health Savings Account) or FSA (Flexible Spending Account), an LMN is often required for reimbursement of expenses that are not clearly defined as eligible under the standard IRS guidelines.

I'm not seeing HSA or FSA options show up at checkout? +

This means that the product is not eligible for this payment method.

Why was my HSA or FSA card rejected? +

Like any credit or debit card, HSA/FSAs can be declined if any of the data from the card is incorrect (number, expiration date, zip code etc).

Flex will alert you at checkout if any of these fields are missing or incorrect so you can update them. The most common reason for rejection of the card is insufficient funds.

Reach out to your HSA or FSA provider to verify the amount of money in your account before attempting to complete your purchase again.