What Is a High Deductible Health Plan (HDHP)? HSAs, Coverage Gaps, and Appeal Strategies

A High Deductible Health Plan (HDHP) is a health insurance plan with a higher-than-standard deductible and lower monthly premiums. The IRS defines an HDHP for 2025 as any plan with a deductible of at least $1,650 for individual coverage or $3,300 for family coverage. The primary draw of HDHPs is their eligibility for Health Savings Accounts (HSAs) — powerful tax-advantaged accounts that let you save and invest money for medical expenses.

HDHPs are common employer-sponsored plan options and are widely available on the ACA marketplace. But they come with significant risks and common denial patterns that every enrollee should understand.

How HDHP Coverage Works

Under an HDHP, you pay the full cost of most medical services until you reach your deductible. This is called "first-dollar exposure" — you are fully responsible for every dollar from your first medical visit of the year until the deductible is met.

Once you meet the deductible, standard cost-sharing applies — you pay coinsurance or copays, and the insurer covers the rest. Once you reach your out-of-pocket maximum, the insurer covers 100% of covered services for the rest of the plan year.

For 2025, the IRS maximum out-of-pocket limits for HDHP-qualifying plans are $8,300 for individual coverage and $16,600 for family coverage.

Preventive Care Is Different

HDHPs must still cover ACA-required preventive services at no cost to you — even before the deductible is met. This is a federal requirement, not a plan feature. Preventive services that must be covered with zero cost-sharing include:

• Annual wellness visits
• Recommended cancer screenings (mammograms, colonoscopies)
• Immunizations
• Certain chronic disease management services (with some complexity following a 2023 Supreme Court ruling on the USPSTF mandate)

If your HDHP is charging you the full deductible amount for a qualifying preventive service, it is in violation of federal law.

Important note: Following the 2023 Braidwood Management v. Becerra case and its subsequent appeals, some preventive care mandates are in legal flux. As of early 2026, most preventive care requirements remain in effect, but it is worth confirming your plan's current coverage with your insurer.

The HSA: HDHP's Core Benefit

An HSA (Health Savings Account) is available only to individuals enrolled in a qualifying HDHP. HSA contributions are:

• Pre-tax (contributions reduce your taxable income)
• Tax-free when withdrawn for qualified medical expenses
• Invested and grown tax-free (unlike FSAs, HSA funds roll over indefinitely)

For 2025, annual HSA contribution limits are $4,300 for individuals and $8,550 for families (plus a $1,000 catch-up contribution for those 55 and older).

HSA funds can be used to pay your deductible costs, copays, prescriptions, dental, vision, and many other qualified medical expenses. They can also be invested for long-term growth.

Common HDHP-Related Denial and Billing Problems

Incorrect application of the deductible to preventive services. This is the most common HDHP compliance error. If your insurer or provider billed you your deductible for a preventive visit or preventive screening, dispute it immediately.

Family deductible structure confusion. HDHPs with family coverage may have embedded or non-embedded deductibles. With a non-embedded family deductible, no individual family member receives cost-sharing until the entire family deductible is met — even if one person has incurred all the costs. This structure can create significant unexpected bills.

Copay accumulator programs eroding HSA planning. Some employer HDHPs include copay accumulator programs that prevent drug manufacturer coupons from counting toward the deductible and out-of-pocket maximum. If you budgeted your HSA contributions based on meeting your deductible by a certain point in the year, a copay accumulator program can undermine that plan significantly.

Telehealth and the HSA compatibility issue. Until 2022, enrollees in HDHPs who used telehealth before meeting their deductible potentially compromised their HSA eligibility. Congress temporarily waived this restriction through 2024. Check your plan for current telehealth cost-sharing rules and their HSA compatibility.

Balance billing after out-of-pocket maximum. Once your HDHP out-of-pocket maximum is met, no further cost-sharing should be collected. If a provider or insurer bills you after you have reached this threshold, demand a refund and file a complaint.

Appealing HDHP-Specific Denials

Many HDHP denials are identical to denials under any other plan type — medical necessity, Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization, network issues. The HDHP-specific appeal situations are:

• Challenging deductible application to preventive services (cite the ACA preventive care mandate)
• Challenging billing errors after the out-of-pocket maximum is reached
• Disputing embedded vs. non-embedded deductible application

For any HDHP denial, follow the standard internal appeal process: request the full denial rationale, gather supporting documentation from your physician, and file a written appeal within the plan's deadline.

Is an HDHP Right for You?

HDHPs are most beneficial for healthy individuals who rarely need medical care, high earners who can maximize HSA contributions and invest the savings, and families with the financial cushion to absorb a high deductible in a bad medical year. They are often a poor fit for people with chronic conditions who need regular care throughout the year.

Fight Back With ClaimBack

If your HDHP improperly applied your deductible to a preventive service, denied coverage for necessary care, or continued billing you after your out-of-pocket maximum was met, you have the right to appeal. ClaimBack helps you build a clear, professional appeal.

Start your appeal at ClaimBack

Related Reading

• What Is a Health Insurance Deductible?
• What Is an Out-of-Pocket Maximum?
• How to Write an Insurance Appeal Letter