Are Saunas HSA Eligible? Yes, Here’s How!

💡 Quick Answer: Are saunas HSA eligible? Yes! Saunas, including home infrared units, traditional steam saunas, sauna blankets, and studio memberships, are HSA/FSA eligible when you have a Letter of Medical Necessity (LMN).

Qualifying conditions, among others, include:

• Hypertension and cardiovascular disease
• Chronic pain, fibromyalgia, and arthritis
• Depression, anxiety, and stress disorders
• Sleep disorders and chronic fatigue
• Type 2 diabetes and metabolic syndrome

The IRS allows sauna therapy as a qualified medical expense under Publication 502 when used to “prevent or alleviate disease.” Crates Health gets your LMN approved in minutes.

The Hidden Cost of Heat Therapy

If you’re serious about sauna therapy, you’re spending serious money. Studio sessions run $30-50 per visit. Monthly memberships at premium facilities cost $150-300. Home infrared units range from $2,000-15,000+ for quality equipment. Regular users easily spend $1,800-3,600+ annually.

Here’s what most people don’t realize: all of this can be tax-free when properly documented. The IRS specifically allows medical expenses that are “primarily for the prevention or alleviation of disease.” When your healthcare provider recommends sauna therapy for a medical condition, those sessions become qualified medical expenses. You could save 30-40% on your sauna costs.

Why Sauna Is Actually Medicine (The Science)

Finland has 3.3 million saunas for 5.5 million people. They’ve been doing this for millennia, and they have one of the lowest rates of cardiovascular disease in the developed world despite a diet heavy in dairy and meat. Coincidence? The research says absolutely not. Here’s what happens in a sauna at 175-195°F: your heart rate increases to 120-150 bpm (similar to moderate exercise), cardiac output increases by 60-70%, blood flow to skin increases 10-fold, core temperature rises 1-2°C, growth hormone increases 16-fold, and heat shock proteins activate. But here’s what the Finns knew intuitively that we’re just proving: sauna isn’t just about physical health. It’s about mental resilience. Sitting in 190°F heat for 20 minutes is uncomfortable. Doing it regularly builds distress tolerance. Studies show sauna use reduces depression scores by 50% and anxiety by 60%.

The scientific evidence for sauna as medical therapy is robust and growing. This isn’t wellness marketing. It’s peer-reviewed research that healthcare providers can cite when recommending sauna therapy.

Cardiovascular Health Benefits

A landmark 2015 study in JAMA Internal Medicine followed 2,315 Finnish men for over 20 years. The results were striking: men who used saunas 4-7 times per week had a 50% lower risk of fatal cardiovascular disease. Risk reduction showed a clear dose-response relationship, meaning more sessions equals greater benefit. All-cause mortality was reduced by 40% in frequent sauna users. Follow-up research published in BMC Medicine confirmed these findings and extended them to stroke prevention, showing a 61% reduction in stroke risk among frequent sauna users.

Blood Pressure and Hypertension

A 2017 study in Hypertension journal found that men who used saunas 4-7 times per week had a 46% lower risk of developing hypertension compared to once-weekly users. The mechanism is well-understood: sauna exposure causes vasodilation, increased heart rate (similar to moderate exercise), and improved endothelial function. Research shows that regular sauna use can reduce both systolic and diastolic blood pressure.

Pain Management and Recovery

Studies on infrared sauna therapy demonstrate significant benefits for chronic pain conditions including reduced pain scores in fibromyalgia patients, improved symptoms in rheumatoid arthritis, enhanced recovery from exercise-induced muscle damage, and reduced chronic fatigue syndrome symptoms.

Mental Health Benefits

Research published in Psychopharmacology shows that whole-body hyperthermia (achieved through sauna use) can have antidepressant effects comparable to pharmaceutical interventions.

The Science of Heat Shock Proteins

When exposed to heat stress, your cells produce heat shock proteins (HSPs). These molecular chaperones repair damaged proteins, prevent protein aggregation (linked to Alzheimer’s), protect against oxidative stress, reduce inflammation, and improve insulin sensitivity. Research shows HSP expression decreases with age, but sauna use can restore youthful levels. This might explain why regular sauna users have 65% lower Alzheimer’s risk. 

This isn’t alternative medicine or wellness trends. It’s evidence-based therapy that healthcare providers can confidently recommend for specific medical conditions.

What the IRS Actually Says About Saunas

The IRS position on sauna eligibility comes down to one key principle: primary purpose.

IRS Publication 502 defines qualified medical expenses as amounts paid for “the diagnosis, cure, mitigation, treatment, or prevention of disease.” The publication specifically states that expenses must be “primarily to alleviate or prevent a physical or mental disability or illness.”

Key IRS Guidelines:

• Medical necessity: The expense must be primarily for medical care, not general wellness
• Healthcare provider recommendation: A qualified professional must prescribe or recommend the treatment
• Specific condition: The treatment must address a diagnosed condition or prevention of a specific disease
• Proper documentation: You need a Letter of Medical Necessity detailing the medical purpose

The IRS has also issued guidance clarifying that wellness expenses can qualify when they are for prevention, treatment, or reversal of a specific condition and are properly documented by healthcare providers.

FSAFEDS (the federal FSA administrator) explicitly includes “health club dues” and medical equipment as eligible expenses when medically necessary and supported by proper documentation.

How to Get Your Sauna HSA/FSA Eligible: Step-by-Step

Whether you’re buying a home sauna or paying for studio memberships, here’s exactly how to make it HSA/FSA eligible.

Step 1: Confirm You Have a Qualifying Condition

The IRS requires sauna therapy to address a specific medical condition—not general wellness. Review the qualifying conditions list below or check your eligibility in 3 minutes.

The key: your condition must benefit from heat therapy. This includes cardiovascular conditions, chronic pain, mental health disorders, and metabolic conditions. The IRS specifically allows expenses for “prevention or alleviation of disease” under Publication 502, so prevention counts, not just treatment.

Step 2: Get Your Letter of Medical Necessity

Your LMN is the documentation that makes your sauna expense eligible. It must come from a licensed healthcare provider and include:

• Your diagnosis (ICD-10 code)
• Why sauna therapy is medically necessary
• Recommended treatment protocol (frequency, duration)
• Provider signature and credentials

Two paths to get your LMN:

• Traditional route: Schedule an appointment with your doctor, explain the medical benefits, and request an LMN. Bring research if needed.
• Crates Health: Complete a 3-minute health questionnaire. Our licensed providers review your information and issue a compliant LMN, often within hours, not weeks.

Important: Get your LMN before you buy. Expenses are only eligible from the LMN date forward.

Step 3: Make Your Purchase

For home saunas:

• Purchase using your personal credit card (recommended for cleaner documentation)
• Save your receipt with itemized costs
• Keep installation invoices separate if applicable

For sauna memberships/sessions:

• Sign up using your personal payment method
• Request itemized receipts showing “sauna therapy” or “infrared sauna session”
• Track your sessions to match your LMN protocol

Step 4: Submit for Reimbursement

Manual reimbursement:

1. Log into your HSA/FSA administrator portal
2. Submit your LMN + receipt
3. Wait 3-7 days for processing
4. Receive tax-free reimbursement

With Crates Health:

• Upload your receipt to the Crates app
• We submit to your HSA/FSA administrator automatically
• Track reimbursement status in real-time

What Makes a Valid Letter of Medical Necessity

Not all LMNs are created equal. HSA/FSA administrators can reject incomplete or improperly formatted letters. Here’s what yours must include:

Required Components

• Patient information: Full legal name, date of birth
• Provider credentials: Licensed MD, DO, NP, or PA with active license
• Diagnosis: Specific condition with ICD-10 code (e.g., I10 for hypertension, M79.7 for fibromyalgia)
• Medical necessity statement: Clear explanation of why sauna therapy is required for this condition
• Treatment recommendation: Specific type of sauna therapy prescribed (infrared, traditional, or both)
• Protocol details: Frequency (e.g., 3-4x/week), duration (e.g., 15-20 minutes), and treatment period (e.g., 12 months)
• Provider signature: Handwritten or electronic signature with date

What Will Get Your LMN Rejected

• Generic statements like “patient would benefit from sauna use”
• Missing ICD-10 diagnosis codes
• Unsigned or undated letters
• Letters from non-licensed providers (wellness coaches, trainers)
• Backdated letters attempting to cover past purchases
• Missing treatment protocol details

Sample Treatment Protocols

For Hypertension:
“Patient to use infrared sauna 3-4 times per week, 15-20 minutes per session, for cardiovascular health improvement and blood pressure management. Treatment recommended for 12 months with periodic evaluation.”

For Chronic Pain:
“Patient to use infrared sauna therapy 4-5 times per week, 20-30 minutes per session, for pain management and muscle relaxation related to fibromyalgia. Treatment recommended for ongoing pain management.”

For Depression:
“Patient to use sauna therapy 3-4 times per week as adjunct treatment for major depressive disorder, utilizing heat therapy’s demonstrated neurochemical benefits. Treatment recommended for 6 months with reassessment.”

The Crates Advantage

Our LMNs are built for compliance. Every letter includes proper ICD-10 coding, specific treatment protocols, and the exact language HSA/FSA administrators need. We’ve processed thousands of sauna LMNs, we know what gets approved.

Medical Conditions That Qualify Sauna for HSA/FSA Eligibility

Based on the scientific evidence and IRS guidelines, sauna therapy can be recommend for numerous medical conditions:

Cardiovascular Conditions

• Hypertension (high blood pressure)
• Cardiovascular disease
• High cholesterol
• Poor circulation
• Heart failure recovery
• Peripheral artery disease

Pain and Musculoskeletal Conditions

• Chronic pain syndromes
• Fibromyalgia
• Rheumatoid arthritis
• Osteoarthritis
• Chronic lower back pain
• Muscle tension and spasms
• Post-exercise recovery needs

Mental Health Conditions

• Depression
• Anxiety disorders
• Chronic stress
• Sleep disorders
• Seasonal Affective Disorder (SAD)

Other Qualifying Conditions

• Chronic fatigue syndrome
• Type 2 diabetes (for cardiovascular benefits)
• Metabolic syndrome
• Autoimmune conditions
• Skin conditions like psoriasis (for infrared therapy)

What Sauna Expenses Are HSA/FSA Eligible

With proper medical documentation, the following sauna-related expenses can be HSA/FSA eligible:

Sauna Sessions and Memberships

• Individual infrared sauna sessions
• Traditional sauna sessions
• Monthly sauna studio memberships
• Annual membership fees
• Spa packages that include medically necessary sauna therapy

Home Sauna Equipment

• Infrared sauna cabins (portable and built-in)
• Traditional steam saunas
• Infrared sauna blankets
• Sauna suits for therapeutic use
• Installation costs (when part of medical equipment setup)

Related Equipment and Accessories

• Thermometers for monitoring therapeutic temperature
• Timers for prescribed session durations
• Protective equipment required for safe therapeutic use

What’s NOT Eligible

• Sauna use for general wellness or relaxation
• Luxury spa treatments without medical necessity
• Equipment used primarily for non-medical purposes
• Family memberships (unless each member has medical documentation)

Frequently Asked Questions