Medical trend is the projected percentage increase in the cost of treating patients from one year to the next, assuming insurance benefits stay the same. It’s the number that health insurers, employers, and benefits consultants use to predict how much more healthcare will cost next year compared to this year. Globally, medical trend is projected at 10.4% for 2025, meaning healthcare costs are expected to rise roughly ten cents on the dollar.
The term can also refer more broadly to shifts in how medicine is practiced, including new technologies, changing care delivery models, and evolving treatment approaches. But when most people encounter “medical trend” in the real world, it’s in the context of health insurance costs. Here’s what drives those numbers and what they mean for you.
Medical Cost Trend Explained
Think of medical trend as a forecast. Insurance companies and large employers need to set premiums and budgets months before the plan year begins, so they estimate how much healthcare spending will increase. That estimate is the medical trend rate, expressed as a percentage. A trend rate of 8% means costs are expected to be 8% higher than last year for the same level of coverage.
This rate isn’t just general inflation applied to healthcare. It’s built from several distinct components that each push costs in a different direction. The three main ingredients are price changes (what providers charge per service), utilization (how often people use healthcare), and intensity (how complex or resource-heavy each visit becomes). A single hospital stay might cost more next year because the hospital raised its rates, because patients are being admitted more frequently, or because the average case involves more advanced procedures. Usually, all three are happening at once.
For context, CMS projections for 2025 show hospital inpatient unit costs rising 2.75%, with utilization adding another 0.50% and increasing case complexity adding 0.50% on top of that. Outpatient hospital services tell a more dramatic story: unit costs rising 2.60% but volume and intensity jumping 6.03%. That outpatient surge reflects a broader pattern where more care is shifting out of traditional hospital beds and into outpatient settings, clinics, and ambulatory surgery centers.
How Trend Rates Vary by Region
Medical trend is not uniform around the world. According to WTW’s 2025 Global Medical Trends Survey, the projected rates vary significantly by region:
- North America: 8.7%, up from 8.1% in 2024
- Europe: 9.4%, down from 10.1% in 2024
- Asia Pacific: 12.3%, up from 11.9% in 2024
- Latin America: 10.1%, slightly down from 10.4%
- Middle East and Africa: 12.1%, the steepest jump from 10.4% the prior year
North America’s rate is the lowest of any region but continues climbing. If you’re an employee wondering why your premiums or deductibles keep increasing even when your benefits haven’t changed, this is a big part of the answer. Your employer is absorbing a cost increase near 9%, and whatever portion they don’t cover gets passed along to you.
What’s Driving Costs Higher
Several forces are compounding to keep medical trend elevated. The most visible right now is the explosion in spending on GLP-1 medications, the class of drugs used for diabetes and weight loss. From 2018 to 2023, spending on GLP-1s rose by more than 500%, climbing from $13.7 billion to $71.7 billion (adjusted for inflation). These medications work well for many patients, but their price and surging demand are putting significant pressure on pharmacy budgets, which feed directly into medical trend calculations.
New technologies also contribute. AI-powered diagnostic tools are entering clinical use, from systems that screen retinal photographs for diabetic eye disease (with roughly 87 to 90% accuracy) to chest X-ray triage tools in emergency departments that can flag urgent findings with about 89% sensitivity. These tools can improve outcomes and efficiency, but their development, licensing, and integration all carry costs that get built into what healthcare systems charge.
Genomic testing in cancer care is another driver. Comprehensive genomic profiling, which scans hundreds of genes to match patients with targeted therapies, is becoming standard practice. In one large health system study, 54% of patients with a relevant biomarker received immunotherapy or targeted therapy rather than conventional chemotherapy. Patients who received biomarker-guided targeted therapy had a median overall survival of 25 months compared to 17 months for chemotherapy alone. These therapies produce better outcomes but are typically far more expensive than older treatments.
The Shift in Where Care Happens
Medical trend isn’t just about things costing more. It also reflects fundamental changes in how and where people receive care. The U.S. retail clinics market, which includes walk-in clinics at pharmacies and big-box stores, was valued at $2.59 billion in 2023 and is projected to reach $7.38 billion by 2032. These clinics offer lower-cost alternatives for routine needs like UTI treatment, vaccinations, and basic screenings, and patient visits have increased significantly over the past two decades.
Remote patient monitoring is another shift reshaping the cost landscape. For chronic conditions like diabetes, hypertension, and heart failure, systems that track patients’ health data from home have been shown to reduce hospitalization rates, improve blood sugar control, lower blood pressure, and increase medication adherence. One study of patients with complex chronic conditions found significant reductions in hospital days and monthly healthcare costs. These models can bend the cost curve downward for specific populations, partially offsetting the upward pressure from new drugs and technologies.
Mental health care is also moving into new settings. The integration of behavioral health providers into primary care offices means patients can be screened and treated for depression, anxiety, and substance use during a routine visit rather than being referred out to a separate specialist. This approach has been shown to improve outcomes among diverse patient populations and increase screening rates for conditions like perinatal mood disorders. For trend calculations, this integration can reduce costly emergency visits and hospitalizations tied to untreated mental health conditions.
What Medical Trend Means for You
If you’re an employee with employer-sponsored insurance, medical trend is the invisible force behind your annual benefits changes. When your company announces higher premiums, a shift to a high-deductible plan, or narrower provider networks, they’re responding to trend projections. An 8.7% trend rate means your employer’s healthcare bill is growing nearly four times faster than general consumer inflation.
If you’re a business owner or benefits manager, the trend rate is the starting point for budget planning. It tells you what to expect before any plan design changes, carrier negotiations, or wellness program savings are factored in. The “net” trend, after those adjustments, is typically lower than the gross number but still substantial.
For anyone trying to understand why healthcare keeps getting more expensive, medical trend captures the full picture in a single number: rising prices, more frequent use of services, more complex treatments, breakthrough but costly drugs, and new technology adoption all rolled together. It’s not any one villain. It’s the compound effect of a healthcare system that keeps expanding what it can do, with costs that follow.