Is Plunge HSA Eligible? The Complete FSA/HSA Plunge Guide
Yes, the Plunge All-In, Plunge Pro, Plunge Pop, chillers, and accessories can all be FSA/HSA reimbursable with a Letter of Medical Necessity. Here's exactly what qualifies, what doesn't, and how to get reimbursed.
6 minute read
Hi, I'm Anthony, co-founder at Burst. Plunge is one of the highest-volume brands in our LMN application data — most cold plunge owners have a documented inflammatory or recovery context, and the LMN math works almost every time.
Short answer. Yes. The Plunge All-In, Plunge Pro, Plunge Pop, the standalone Plunge Chiller, and Plunge accessories purchased to maintain the system can all be reimbursed from your FSA or HSA with a Letter of Medical Necessity. Plunge is what the IRS calls dual-purpose under Publication 502 and Notices 2006-69 and 2007-2: home wellness equipment by default, medical equipment when a clinician documents the medical context. The contexts that approve most consistently are chronic inflammatory pain, autoimmune conditions, depression with documented thermal therapy, and post-surgical recovery. Below is the full walkthrough.
If that already describes you, the request takes about three minutes and you can skip the rest of this guide.
What FSA and HSA cover for Plunge
Plunge sits in the same IRS dual-purpose category as saunas and other home thermotherapy equipment. The IRS rule is consistent: products that treat, mitigate, or alleviate a specific medical condition reimburse when documented. "For general recovery" doesn't qualify. "For management of rheumatoid arthritis with documented anti-inflammatory thermal therapy plan" does.
Burst's clinicians write LMNs in the language plan administrators approve, and if our clinician decides a situation doesn't fit, you get a full refund.
What's eligible with an LMN
Plunge All-In. The integrated tub-and-chiller system.
Plunge Pro. The premium full-size plunge.
Plunge Pop. The portable inflatable model.
Plunge Chiller. The standalone chiller for use with an existing tub.
Plunge Cover. Insulating covers when needed for tub maintenance.
Water treatment systems (filters, sanitizers) for ongoing tub maintenance.
Delivery and installation fees on the same receipt.
What's not eligible, even with an LMN
Plunge apparel and merchandise.
Cosmetic upgrades. Custom finishes purely for aesthetics.
Outdoor decking and pad construction for installation. The tub reimburses, the patio doesn't.
Plunge for someone without their own LMN.
Common reasons people get a Plunge LMN
Chronic inflammatory pain (rheumatoid arthritis, ankylosing spondylitis, lupus)
Fibromyalgia
Depression where thermal therapy is part of a documented treatment plan
Post-surgical recovery and inflammation management
Autoimmune conditions with documented thermal protocols
Athletic recovery in the context of cardiac rehabilitation or post-surgical reconditioning
Anxiety and PTSD where vagal nerve stimulation is part of the treatment plan
A few common Plunge FSA/HSA pitfalls
Forgetting the chiller. A Plunge tub without a chiller doesn't function — the chiller reimburses on the same LMN.
Submitting the financing statement. Plunge often involves financing. Submit the original Plunge receipt.
Letting the LMN expire before maintenance purchases. Replacement filters and water treatment over the device's lifetime each need a current LMN.
Missing the installation cost. When delivery and install are on the same receipt as the tub, they reimburse together.
Plunge FSA/HSA FAQ
Is Plunge HSA eligible without an LMN?
Plunge is a wellness product by IRS default. The LMN is what creates eligibility.
Is the Plunge Pop covered?
With an LMN, yes. Same eligibility as the All-In and Pro.
Are replacement filters covered?
On the same LMN as the system, yes. Recurring while the LMN is current (12 months typical).
Can I get an LMN after I bought my Plunge?
Per IRS guidelines, LMNs must be for purchases made on or after the LMN request date. Going forward (filters, accessories, future maintenance), the LMN covers them.
Is the LMN fee itself FSA/HSA eligible?
Yes.
Stop paying full price for your Plunge
If you're already paying for a Plunge and you've got a documented context, the LMN turns it into pre-tax. Around 30% savings. Get yours from Burst in under 5 minutes.
If you're not sure whether your situation fits, hit reply on any Burst email or write to support@getburst.com. We read every email ourselves.
Thanks,
Anthony
CEO and Co-Founder at Burst
For the underlying rules, see IRS Publication 502, IRS Notice 2006-69, and IRS Notice 2007-2.
Last updated: May 2026
This guide is not medical advice. Your eligibility depends on your specific situation and your plan administrator's interpretation of IRS rules. Burst's clinicians make eligibility decisions on a case-by-case basis.
