Burst vs Flex Health HSA Comparison (2026)
LMN, reimbursement-claim, and appeals support for eligible HSA/FSA purchases, with no checkout change for merchants.
HSA/FSA payment platform focused on gym memberships and fitness, including Equinox integration.
HSA Eligibility at a Glance
Burst
Merchant-specific HSA/FSA support (LMN requirements vary)
Burst says customers can request an LMN for any eligible product or service, including items outside a partnered-brand list. It also says it files claims, manages appeals and subsequent TPA issues, and refunds its LMN fee if a claim is denied. Final eligibility remains with the account administrator.
Flex Health
Merchant-specific HSA/FSA support (LMN requirements vary)
Flex's checkout can include an LMN evaluation. The LMN supports a claim, while the account administrator makes the final eligibility decision.
Pricing
Burst
Current public LMN request price is $35; merchant programs may differ
Flex Health
Varies by product; current gym/studio reimbursement example is $15
Which Should You Pick?
When to choose Burst
- You want an LMN, claim-filing, appeals, and TPA-support flow without changing how a merchant bills you
- Your eligible product or service is not limited to a partnered-brand list
- The published Burst fee and denied-claim refund terms fit your situation
- You can keep the merchant receipt and any issued LMN together
When to choose Flex Health
- Your merchant offers a Flex checkout or reimbursement flow
- The disclosed Flex fee and payment path fit your purchase
- Your preferred brand uses Flex at checkout
Visit Each Vendor
Related Comparisons
Common Questions
Are Burst and Flex Health both HSA-eligible?▼
Which has more brand partners?▼
Do I pay extra to use either?▼
Will my HSA card work at checkout?▼
Does Burst handle appeals if a reimbursement claim is denied?▼
How do I track these purchases for my HSA?▼
Read More
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Whether you use Burst or Flex Health, snap a photo of your receipt and let AI categorize it. Keep your LMN documentation organized.
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