What is medication non-adherence and why does it matter for insurers?

Understanding why claimants don't take medications as prescribed, its impact on recovery and claim costs, and how to support better adherence.

Published: 3 April 2026 | Updated: 3 April 2026

Understanding Medication Non-Adherence

Medication non-adherence is when a claimant doesn't take medications as prescribed. This includes taking doses less frequently than directed, taking smaller doses, missing doses entirely, or stopping medications early. It's one of the most common and consequential medication-related problems in insurance claims, yet it's often invisible to case managers until treatment fails.

Non-adherence isn't laziness or forgetfulness; it's typically a rational response to barriers that make taking medications difficult or undesirable. Understanding why your claimant isn't adhering is the first step to addressing the problem and getting them back on track toward recovery.

Forms of Non-Adherence

Primary Non-Adherence

The claimant never fills the prescription. They intend to take the medication but never actually obtain it. This might occur because they don't understand the medication's importance, can't afford the copayment, or are concerned about side effects they've heard about. In insurance claims, identifying primary non-adherence requires regular communication about whether claimants are actually collecting their prescribed medications.

Secondary Non-Adherence

The claimant fills the prescription but doesn't take it as directed. They might skip doses, reduce the frequency, take smaller amounts, or stop early. This is the most common form. A claimant might take pain medication when pain is severe but skip it when pain is mild, or reduce doses due to side effects without discussing it with their prescriber.

Persistent Non-Adherence

The claimant consistently doesn't take medications over extended periods, becoming essentially untreated while remaining on your scheme's medication budget. They're receiving funding for medications they're not using, and they're not receiving the clinical benefit that would support their recovery.

Why Claimants Don't Adhere to Medications

Medication Factors

• Side effects: A claimant prescribed a pain medication that causes nausea or constipation might skip doses to avoid discomfort. Rather than contact their prescriber, they self-adjust.
• Complex regimens: Taking multiple medications multiple times daily is cognitively demanding. Claimants on four medications three times daily often forget doses or become confused about timing.
• Cost barriers: Even with insurance coverage, copayments accumulate. A claimant with limited income might prioritise other expenses over refilling a psychiatric medication they perceive as non-urgent.
• Slow benefit onset: Medications like antidepressants take 4-6 weeks to work. A claimant expecting immediate benefit might stop after two weeks, concluding the medication isn't working.

Claimant Factors

• Lack of understanding: If claimants don't understand what a medication does or why they need it, adherence plummets. A claimant told to take a blood pressure medication might not see the relevance if they feel fine.
• Cognitive impairment: Brain injury, post-surgical confusion, or pain-related cognitive dysfunction reduces medication adherence. Complex regimens become impossible to manage.
• Psychological barriers: Depression reduces motivation for self-care, including medication adherence. Anxiety about medications ("will this make me dependent?") can deter use.
• Denial of illness: Claimants who perceive their condition as temporary or minor might deprioritise medications managing that condition.
• Competing priorities: A claimant juggling return-to-work demands, rehabilitation appointments, and family responsibilities might inadvertently deprioritise medication management.

System Factors

• Poor prescriber communication: If the prescriber doesn't explain why a medication is necessary or how to manage side effects, adherence suffers.
• Fragmented care: When multiple prescribers don't communicate, claimants receive conflicting guidance or duplicative therapy, creating confusion.
• Pharmacy access: Claimants in rural areas, with transport difficulties, or who work long hours may struggle to refill prescriptions at convenient times.

Why Non-Adherence Matters in Insurance Claims

Treatment Failure and Delayed Recovery

Non-adherence causes treatment failure. A claimant on inadequate pain medication (because they skip doses) doesn't recover pain control, continues limiting activities, and remains disability-bound. They're essentially untreated while remaining on your disability claim. Recovery stalls because the medication supporting recovery isn't actually being taken.

Worsening of Underlying Conditions

For chronic conditions, non-adherence permits disease progression. A claimant with post-traumatic stress disorder on psychiatric medication might stop taking it once symptoms improve, then relapse into severe anxiety weeks later. A claimant with high blood pressure who stops blood pressure medication might have a stroke. Non-adherence transforms manageable conditions into crises.

Preventable Hospitalisations

Non-adherence causes preventable hospital admissions. A claimant who stops an inhaler might have an asthma exacerbation requiring emergency care. A claimant who doesn't take heart medication might have a cardiac event. These hospitalisations cost your scheme substantial amounts and further disable the claimant.

Extended Claim Duration

Non-adherence prolongs claims by delaying recovery. A claimant expected to return to work in 12 weeks might remain on disability for 24 weeks if non-adherence prevents pain control. The extra three months of lost wages, medical expenses, and rehabilitation costs add directly to your claim liability.

Financial Waste

You're funding medications the claimant isn't taking. If a claimant refills pain medication monthly but only takes half the supply, you're paying for medication benefit that isn't being delivered. This is particularly problematic when medications are expensive (specialty drugs, newer medications) and the benefit is wasted.

Identifying Non-Adherence in Your Claims

Strategies to Support Medication Adherence

Simplify Regimens

Reducing medication frequency improves adherence. Ask prescribers whether once-daily or twice-daily medications can replace four-times-daily regimens. Combination medications (multiple drugs in one pill) reduce pill burden. Simplified regimens dramatically improve adherence.

Address Side Effects

When claimants report side effects, treat them seriously. Prescribers might adjust doses, add medications to manage side effects, or switch to medications with better tolerability. A claimant willing to tolerate side effects for clear benefit is likely to adhere. A claimant enduring side effects with unclear benefit is likely to stop.

Clarify Benefit and Purpose

Ensure claimants understand what each medication is for, what benefit to expect, and when to expect improvement. Concrete explanations ("this medication will reduce your pain from 8/10 to 4/10 within two weeks") are more motivating than vague statements. When claimants see expected benefit, adherence improves.

Reduce Financial Barriers

For claimants with limited income, explicit discussion of cost barriers allows problem-solving. Can they use generic medications instead of branded? Can the prescription be split into smaller batches for lower copayments? Can they use pharmacies offering bulk discounts? Your case manager addressing cost barriers directly improves adherence.

Enhance Communication and Support

Regular check-in conversations about medication adherence create accountability and allow early identification of barriers. A quick text message or phone call asking "How are you getting on with the pain medication?" opens dialogue. Early identification of adherence barriers allows intervention before treatment fails.

Medication Review and Optimisation

A comprehensive medication review identifies adherence barriers, simplifies regimens, manages side effects, and clarifies benefit. For complex claims with multiple medications or apparent treatment failure, medication review supports adherence and enables recovery.

Key Takeaways for Insurers

• Non-adherence occurs when claimants don't take medications as prescribed
• Affects 50-70% of claimants on prescribed medications
• Results from medication factors, claimant factors, or system barriers, not laziness
• Causes treatment failure, delayed recovery, and preventable hospitalisations
• Extends claim duration and wastes pharmaceutical expenditure
• Often invisible until treatment fails; regular monitoring identifies early problems
• Addressed through simplifying regimens, managing side effects, clarifying benefit, and removing barriers
• Medication review identifies adherence barriers and enables targeted intervention