When a rheumatologist prescribes Humira instead of a biosimilar, or an oncologist chooses Ocrevus over a generic alternative, it’s not because they’re ignoring cost. It’s because, for many patients, there’s no real substitute that works the same way. Specialty drugs-expensive, complex, and often life-changing-are at the heart of a quiet but massive shift in how medicine is practiced. And specialists are the ones making the calls.
What Makes a Drug "Specialty"?
A specialty drug isn’t just expensive. It’s defined by three things: high cost (usually over $670 a month), complex use (injections, infusions, special storage), and limited distribution (only available through specialty pharmacies). These aren’t your typical pills you pick up at CVS. These are drugs for conditions like multiple sclerosis, rheumatoid arthritis, cancer, and rare genetic disorders. They’re often biologics-made from living cells, not chemicals-which means they’re harder to copy exactly.
In 2021, just 6.2% of all prescriptions were for specialty drugs. But they made up 71.1% of total prescription drug spending. That’s the key stat. One patient on a specialty drug can cost more than 75 times what a patient on a regular medication costs. And it’s not just Medicare. Commercial insurers are feeling the pinch too. UnitedHealthcare reported that specialty drugs accounted for 53% of their total pharmacy spend in 2023, even though they made up only 3% of claims.
Why Do Specialists Prefer Brand-Name Drugs?
It’s not about loyalty to a drug company. It’s about trust in outcomes.
Take a patient with multiple sclerosis. Ocrevus (brand) and its biosimilar might look similar on paper. But in real life, some patients respond differently. A 2023 Medscape survey of 1,200 specialists found that 68% said they frequently face pressure from insurers to switch patients to cheaper alternatives-yet 72% of them still chose to stick with the brand-name drug because they’d seen better results in their own practice.
One rheumatologist in Atlanta told a patient, "I’ve seen three people switch from Humira to a biosimilar. Two had flare-ups within six weeks. One had to be hospitalized. I can’t risk that." This isn’t anecdotal noise. A JAMA Network Open study found that when prescribers or patients request brand-name drugs over generics, it adds $1.67 billion annually to Medicare costs alone. That’s not because doctors are careless. It’s because they’ve seen what happens when you swap a drug that’s been working.
For many specialists, especially in oncology and neurology, the margin for error is razor-thin. A drug that’s 90% effective might be good enough for a common condition. But for someone with advanced cancer or a degenerative neurological disease? 90% isn’t enough. They need 95%. Or 98%. And in those cases, brand-name drugs have the most robust real-world data.
The Role of PBMs and Hidden Costs
Here’s where it gets messy. Pharmacy Benefit Managers (PBMs)-companies like CVS Caremark, Express Scripts, and OptumRx-control access to these drugs. They negotiate with manufacturers, set formularies, and run specialty pharmacies. In theory, they’re supposed to lower costs. But data from the Federal Trade Commission’s January 2025 report shows something else: PBMs marked up specialty generic drugs by thousands of percent.
For example, a generic version of a specialty drug might cost $1,200 to acquire. The PBM-affiliated pharmacy charges the insurer $18,000. That’s a 1,400% markup. And it’s not rare. Between 2017 and 2021, the "Big 3" PBMs generated over $7.3 billion in revenue from these markups alone. Meanwhile, patients are stuck with high copays-even if their insurance "covers" the drug.
One patient on Reddit, u/ChronicWarrior42, shared: "My insurance says Ocrevus is covered. But my copay is $1,200 a month. My doctor says there’s no alternative that works for my mutation. So I pay it." That’s the reality. The system is designed to make brand-name drugs seem like the only option-even when generics exist.
Prescriber Time and Administrative Burden
Specialists aren’t just prescribing. They’re managing a maze.
The American Medical Association found that physicians spend an average of 13.4 hours per week on prior authorizations. Of that, 78% is tied to specialty drugs. That’s over two full workdays a month just filling out forms, calling insurers, and fighting denials. One oncologist in Chicago said, "I’d rather spend that time reading a new study or talking to a patient. Instead, I’m on hold with a call center that doesn’t even know what a biosimilar is."
And it’s not just time. It’s stress. A 2024 study in the Journal of Managed Care & Specialty Pharmacy found that 42% of specialty drug starts are delayed by seven or more days because of paperwork. For a patient with rapidly progressing disease, that delay can mean the difference between remission and worsening symptoms.
Patients Are Caught in the Middle
Patients don’t choose these drugs. They’re prescribed. And when the cost jumps from $50 to $850 a month overnight-because their insurance plan changed-they’re left scrambling.
On the Medicare Rights Center forum, a user named SeniorCare2024 wrote: "My Humira copay went from $50 to $850. My rheumatologist says biosimilars aren’t right for me. But I can’t afford this. What do I do?" There’s no easy answer. Patient assistance programs exist-NORD helped 45,000 people in 2023-but they’re not enough. And not everyone qualifies.
Meanwhile, drug companies continue to push brand-name drugs. ProPublica’s 2016 analysis found that doctors who received more than $5,000 from pharma companies in 2014 prescribed brand-name drugs 50% more often than those who received nothing. It’s not a smoking gun, but it’s a pattern. And it’s hard to ignore when you’re the one footing the bill.
What’s Changing? And What’s Next?
The Inflation Reduction Act of 2022 gave Medicare the power to negotiate prices for some high-cost drugs. That’s a start. Drugs like Jakafi, Ofev, and Xtandi could be next on the list. But these are just a handful. There are over 2,700 specialty drugs in development, 45% targeting rare diseases. Most won’t have competition for years.
And the numbers keep climbing. Global spending on specialty drugs hit $229 billion in 2023. By 2028, Evaluate Pharma predicts it’ll be 73% of all prescription drug spending. Medicare Part D spending on specialty drugs is projected to hit 60% by 2030. That’s not sustainable.
There’s growing pressure for change. Senator Bernie Sanders introduced the "Specialty Drug Price Transparency Act" in February 2025. The FTC is investigating PBM practices. CMS is proposing new rules to force pricing transparency. But until patients, doctors, and insurers are all aligned on what "value" means, the system will keep favoring brand-name drugs-not because they’re better, but because the system makes them seem like the only option.
What Can Be Done?
For specialists: Use real-world data to justify brand-name use. Document patient response clearly. Push back on formulary restrictions with evidence, not just preference.
For patients: Ask your doctor about patient assistance programs. Check if your drug has a manufacturer coupon. Ask if a biosimilar is an option-and why or why not.
For payers: Stop treating all specialty drugs the same. Not all are created equal. Some have no alternatives. Others do. A one-size-fits-all approach fails.
For policymakers: Fix the PBM markup problem. Require full transparency in pricing. Stop letting middlemen profit from confusion.
Specialty drugs aren’t going away. They’re saving lives. But the way we pay for them is broken. And until that changes, specialists will keep prescribing the brand-name drugs-not because they want to, but because the system leaves them no better choice.
Why do specialists prefer brand-name drugs over generics?
Specialists often prefer brand-name drugs because many specialty conditions-like multiple sclerosis, rheumatoid arthritis, and certain cancers-have no true generic equivalents. Biosimilars may exist, but real-world data shows some patients respond differently, with higher risks of flare-ups or treatment failure. For conditions where the margin for error is small, doctors rely on the long-term safety and efficacy data from brand-name drugs.
Are brand-name specialty drugs really more effective than biosimilars?
In most cases, biosimilars are clinically equivalent. But equivalence doesn’t always mean interchangeability in practice. Some patients develop antibodies to biosimilars, or experience subtle differences in how the drug behaves in their body. A 2023 Medscape survey found that 72% of specialists had seen patients worsen after switching from a brand-name biologic to a biosimilar. That’s why many doctors choose to stick with what’s worked.
Why are specialty drugs so expensive?
Specialty drugs are expensive because they’re complex to develop, require specialized handling, and treat rare or chronic conditions with few alternatives. But much of the cost isn’t from manufacturing-it’s from markups by Pharmacy Benefit Managers (PBMs). The FTC found PBMs marked up specialty generics by thousands of percent, with excess revenue reaching $7.3 billion between 2017-2022. Drug manufacturers also set high prices because they face little competition.
Do insurance plans cover specialty drugs?
Yes, but coverage is complicated. Most plans cover specialty drugs, but often require prior authorization, step therapy, or use of specialty pharmacies. Even with coverage, out-of-pocket costs can be extremely high-sometimes over $1,000 per month. Patients may be stuck paying for a drug their doctor says is essential, with no cheaper alternative.
What role do PBMs play in specialty drug prescribing?
PBMs control access to specialty drugs by managing formularies, negotiating rebates, and running specialty pharmacies. While they’re supposed to lower costs, they often profit from markups on generic and biosimilar drugs. The FTC found that PBMs generated over $7.3 billion in excess revenue from specialty drugs between 2017 and 2022. Their influence can delay care, limit patient choice, and inflate prices without improving outcomes.