Why NHS Prescription Spending by ICB Varies Across England and How to Read the Data Fairly

Summary

NHS prescription spending by ICB differs because of age, illness, deprivation, the mix of medicines and local prescribing habits, not simply because of efficiency. A bigger total does not automatically mean worse care or more waste. The fair question is always why an area differs, and whether that difference remains once you account for the people it serves.

Introduction

You open a spreadsheet on NHS prescription spending by ICB, notice that one area spends far more than its neighbour, and the obvious thought arrives. Surely someone is wasting money. It is a natural reaction, but it is often the wrong one.

The stakes are high. Community prescriptions in England cost the NHS more than £10 billion a year, so a misread figure can easily turn into a misleading headline or a poor local decision. Prescribing data can be genuinely useful, yet they are easy to misinterpret.

If you want to explore the figures yourself, the NHS ICB Prescribing Explorer — Local Drug Spend 2026 lets you compare areas side by side, and it is free to use. This guide explains what sits behind the numbers, so you can read them with a cool head.

What the Data Actually Measure

Before comparing anything, you need to know what is being counted. Most public prescribing figures come from the NHS Business Services Authority (NHSBSA). They describe prescriptions written in England and dispensed in the community, such as at your local pharmacy.

In broad terms, the community dataset typically includes:

• Prescriptions written by GPs and other primary care prescribers.
• Items dispensed by community pharmacies and appliance contractors.
• Some prescriptions written in hospitals but dispensed in the community.

That sounds simple, but the details matter a great deal.

Prescription Items Are Not Patients or Medicines

A prescription item is generally one entry for one medicine on a prescription. If a doctor prescribes three different medicines on one form, that is usually three items. If the same patient collects the same medicine every month for a year, that is twelve items.

So an item count is not a count of people. Nor is it a count of tablets or of separate medicines. Two areas could have the same number of items but very different numbers of patients, simply because one issues shorter prescriptions and the other issues longer ones.

On its own, an item count cannot tell you:

• How many different people received medicines.
• How long each prescription lasted.
• Whether the medicine was taken correctly.
• Whether the prescribing was clinically appropriate.

Because of this, a sensible reading follows a rough order of steps:

1. Check whether the figure is an item count or a cost.
2. Check which period the data cover.
3. Check which organisations are included.
4. Only then compare one area with another.

Cost, Items and Cost per Item

Cost figures add another layer. NHSBSA publishes more than one cost measure, and the two best known are net ingredient cost and actual cost. In plain terms, net ingredient cost is the basic price of the medicine before discounts and fees. Actual cost tries to reflect what the NHS pays after discounts, with fees added in.

Neither is wrong, but they answer different questions. If you compare one area's net ingredient cost with another area's actual cost, you are comparing apples with pears. Always check that you are using the same measure on both sides.

The most useful trio of numbers is usually:

• Total items prescribed.
• Total cost.
• Average cost per item.

An area can have a high total cost but a modest average cost per item, which points to volume. Another can have average volume but a high cost per item, which points to a few expensive medicines.

Why NHS Prescription Spending by ICB Differs

England has 42 ICBs, and each serves a very different mix of people. Some cover big cities with young, mobile populations. Others cover coastal towns and rural areas with many older residents. It would be surprising if they all spent the same. There are several reasons for the gaps, and they usually overlap.

Population Age and Size

The simplest driver is people. A larger population needs more medicines in total, so raw totals flatter small ICBs and penalise large ones. That is why any fair comparison uses a per-person figure rather than a raw total.

Age matters just as much. Older people are more likely to live with several long-term conditions, and those conditions often need regular medication. An ICB with a higher share of older residents will usually show more items and higher costs, even if its clinicians prescribe very carefully.

Analysts often adjust for this with age and sex weighting, using prescribing units that reflect the make-up of a practice list. You do not need to do the maths yourself, but it helps to know that a simple per-head figure is only a first step.

When you see a per-person figure, ask yourself:

1. Does it use the registered patient population?
2. Has it been adjusted for age and sex?
3. Does the population include many temporary residents, such as students or holidaymakers?

Deprivation and Long-Term Conditions

Health is not spread evenly across England. Conditions such as diabetes, heart disease, asthma, COPD and mental illness are more common in some communities than others. Deprived areas often have higher rates of illness and more people living with several conditions at once.

More illness usually means more prescribing, and that is often the system working as intended. Someone with diabetes and high blood pressure will reasonably be on several regular medicines. A higher bill in these places may reflect real need, not overuse.

Conditions that most often push up prescribing include:

• Diabetes and its related complications.
• Heart and circulatory conditions.
• Respiratory conditions such as asthma and COPD.
• Mental health conditions.
• Pain and musculoskeletal problems.

The Mix of Medicines

Not all medicines cost the same, and this is where totals can mislead. A small number of high-cost medicines can account for a large share of spending, even when the number of items looks ordinary. One area might issue many cheap items, while another issues fewer items that cost much more.

This means two areas can look alike on volume and very different on cost. A cost-per-item figure helps you spot this pattern quickly. It also helps to ask whether a cost rise comes from:

• A change in the price of a common medicine.
• A new treatment being used more widely.
• More patients receiving an existing medicine.
• A shift from one product to another.

Each of those has a different meaning, and only the last one is really about local choices.

Local Prescribing Practice

Local habits do play a part. ICBs and their practices decide which medicines they recommend first, and how readily they use lower-cost generic versions or biosimilars. Local formularies, which are preferred medicine lists, can nudge prescribers in a particular direction.

Service design matters too. Some medicines are started by hospital specialists and continued by GPs, while others stay under specialist control, and these arrangements change what appears in primary care figures.

Areas where local practice can make a real difference include:

• Use of lower-cost generic medicines where suitable.
• Use of biosimilar versions of biological medicines.
• Regular medication reviews.
• Support from pharmacists working in GP practices.

Putting these factors together, you can think of a spending gap as the sum of several causes:

1. Differences in who lives there.
2. Differences in how ill they are.
3. Differences in which medicines they need.
4. Differences in how prescribers choose between options.

Only the fourth is clearly about local decision-making, and it is usually the smallest part of the picture.

How to Read NHS Prescription Spending by ICB, Step by Step

Now for the practical part. A careful reading does not need special software, only a steady routine, and a first comparison takes about 15 minutes. The aim is to avoid drawing a conclusion from the first number you see.

Start With a Fair Comparison

Comparing a large urban ICB with a small rural one on raw totals tells you almost nothing. Compare per-person figures and, where you can, look at similar types of area. A sensible routine looks like this:

1. Pick one measure, such as cost per head.
2. Pick one time period and keep it the same.
3. Compare areas with similar age profiles.
4. Look at the medicine mix behind any large gap.
5. Check trends over several periods, not a single month.

Look at the direction of travel as well. An ICB with high spending that is falling slowly tells a different story from one that is rising quickly, and a single snapshot hides that difference.

Common Traps to Avoid

The first trap is boundaries. ICB areas can be reorganised, and names, structures and boundaries may change over time. If you compare periods before and after a change, make sure you are comparing like with like.

The second trap is scope. Community prescribing data do not capture every medicine used in an area, and medicines supplied inside hospitals are generally outside this picture. These figures should never be read as an ICB's whole medicines bill.

The traps that catch people out most often are:

• Comparing raw totals instead of per-person figures.
• Mixing different cost measures.
• Ignoring changes in ICB boundaries.
• Treating the data as total medicines spending.
• Reading a single month as a trend.

The third trap is a human one. It is tempting to assume that the highest-spending area must be doing something wrong. Usually, the more honest answer is that you do not yet know.

A Simple Way to Think About Two Areas

Imagine two neighbouring ICBs, one of which spends noticeably more per head than the other. This is an illustration of the method, not real data.

First, ask whether the higher-spending area is older or has more people with long-term illness. Next, check whether it prescribes more items per person, or whether its items simply cost more. Then look for a handful of expensive medicines that could explain the difference.

If the gap disappears once age and illness are considered, the area is probably spending what its population needs. If it persists, that is a good reason to ask further questions, such as whether cheaper equivalent medicines are being used where appropriate. Either way, you have moved from a hunch to a reasoned view.

What This Means for You as a Patient

All of this can feel distant from everyday life, so it is worth being clear about what ICB spending does and does not change for you.

Your Prescription Charge Stays the Same

In England, the prescription charge is set nationally, at £9.90 per item at the time of writing, and it does not rise or fall with your ICB's spending. Charges are usually reviewed each spring, so check the NHS website for the latest figure. Many people qualify for free prescriptions, for example because of age, certain medical conditions or low income.

What your ICB's spending does not change for you:

• The standard prescription charge in England.
• Whether you qualify for free prescriptions.
• Your right to a clinically appropriate medicine.

What local spending can influence is how the NHS plans services and sets priorities, which is a slower and less visible effect.

Practical Steps You Can Take

You cannot control your area's spending, but you can make your own prescriptions work harder. Consider an illustrative example. Dan, 45, from Bristol, pays for two regular medicines every month. At £9.90 per item, that comes to £237.60 a year. A 12-month prepayment certificate, priced at £114.50 at the time of writing, would cover all his prescriptions and save him around £123. That money is lost every year he does not check.

Common worries tend to stop people acting, so it helps to address them directly:

• A prepayment certificate is not credit, so applying will not affect your credit file.
• There are no hidden fees beyond the published price.
• The 12-month certificate can be spread across monthly Direct Debit payments.
• Applying online through the NHSBSA usually takes around 10 minutes.

A few further habits help you, and they help the NHS too:

1. Ask for a medication review at least once a year.
2. Tell your GP or pharmacist if a medicine is not working or causes side effects.
3. Only order what you need, so that medicines are not wasted.
4. Ask whether a prepayment certificate would save you money.
5. Keep an up-to-date list of everything you take.

Good access to your surgery makes regular reviews much easier. If you are new to an area, our GP access and registration checklist walks you through getting set up properly.

Some people also weigh up going private when NHS waits are long. If that applies to you, our NHS vs private therapy cost calculator helps you compare real costs, and our guide to common mistakes when weighing NHS and private therapy waits shows what people tend to overlook.

Using the Data Responsibly

If you are a student, journalist, councillor or simply a curious reader, prescribing data offer a valuable window into local health. The key is to present findings with care, describing what you see and listing the possible explanations rather than naming a culprit.

Good habits for sharing what you find:

• State which measure and time period you used.
• Say whether you adjusted for population.
• Mention the limits of what the data cover.
• Avoid labelling an area as best or worst.

Careful framing protects you from errors and makes your analysis far more credible. It also keeps the focus where it belongs, on understanding people's needs.

Conclusion

Prescription spending varies across England because people, their health and their medicines vary. Age, illness, deprivation, the mix of high-cost medicines and local prescribing choices all play a part, and the data have limits in what they cover. A big number is the starting point for a question, not an answer.

When you read ICB data, compare per-person figures, check the cost measure, look at the medicine mix and watch for boundary changes. Resist the urge to rank areas as good or bad. The fairest question is always why an area differs, and whether the gap holds up once you account for who lives there.

To put this into practice, open the NHS ICB Prescribing Explorer — Local Drug Spend 2026, pick two areas with similar age profiles and compare their cost per head and cost per item. It takes about 15 minutes and costs nothing. If you pay for regular prescriptions, check today whether a prepayment certificate would save you money, before another year of charges adds up. And if you need to get properly registered with a surgery, the GP access checklist mentioned above is a sensible place to start.

Sources

• NHSBSA: Prescription data
• NHS: NHS prescription charges
• GOV.UK: English indices of deprivation 2019