Mixed dementia assessment
An assessment to find out whether memory and thinking problems are caused by more than one type of dementia at the same time, most often Alzheimer's disease together with vascular dementia.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Mixed dementia means having more than one type of dementia at once — most often Alzheimer's disease with vascular dementia.
- It is common in older people, and symptoms are often a blend, which can make it harder to pin down.
- There is no cure; treatment is tailored to the diseases present, including managing vascular risk factors, and benefit is reviewed.
- Diagnosis is based on the overall pattern, because not every type of disease can be seen in a living person's brain.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your psychiatrist will give you advice for your situation.
Recognises that more than one cause may be at play, which can explain a blend of symptoms
Sudden weakness, slurred speech or facial drooping — this is a possible stroke and is a 999 emergency, not a clinic referral.
You may feel tired after testing. A first impression may be shared, but with mixed dementia a full and settled answer often takes longer.
A clear, compassionate explanation that more than one cause may be present, and what that means.
You may feel tired after testing. A first impression may be shared, but with mixed dementia a full and settled...
Results are reviewed together and a diagnosis is usually given, with a letter to your GP and a plan tailored to...
Where Alzheimer's features are present, a medicine may be started slowly and reviewed; vascular risk factors are...
The team and family watch how symptoms change, which can clarify the mix. Support is put in place and planning...
What is a mixed dementia assessment?
Mixed dementia means having more than one type of dementia at the same time. By far the most common combination is Alzheimer's disease together with vascular dementia, but other combinations happen too.
Mixed dementia is common, especially in older people. When dementia develops later in life, it is often caused by more than one disease in the brain rather than a single one. This is one reason why symptoms can be a blend — for example problems with recent memory (more typical of Alzheimer's) alongside slowed thinking and difficulty with planning (more typical of vascular damage).
Assessment means working out whether more than one cause is at play. A memory clinic team builds a picture from your history, an account from someone who knows you well, tests of thinking, blood tests, and a brain scan. Telling mixed dementia apart can be difficult, because doctors cannot see every type of disease in the brain of a living person, so the diagnosis is often based on the overall pattern.
There is no cure. Treatment is guided by which diseases are present — for example a medicine used in Alzheimer's may be considered, while vascular risk factors such as blood pressure and diabetes are managed — alongside support and planning.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Options at a glance
These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.
History and collateral history
The clinician asks how symptoms started and how they affect daily life, usually with an account from a relative or friend. In mixed dementia, the history may show a blend —...
Cognitive (pen-and-paper) tests
Tests of memory, attention, language, planning and speed of thinking. A mixed picture — for example both memory and planning affected — can be a clue, though tests are read...
Blood tests and physical check
These look for treatable conditions and for vascular risk factors such as blood pressure, diabetes, cholesterol, thyroid and vitamin levels, and may include a heart-rhythm...
Brain scan
A CT or MRI scan can show both shrinkage patterns and the changes of stroke or small vessel disease, supporting a mixed picture. A scan helps but cannot, on its own, confirm...
Preparing for your test
- Bring someone who knows you well; their account of how symptoms changed over time is very useful.
- Note whether problems came on gradually, in steps, or both, with everyday examples.
- Bring a full list of your medicines, including anything for blood pressure, cholesterol or thinning the blood.
- Mention any history of stroke, mini-strokes (TIAs), heart problems, diabetes or high blood pressure.
- Bring glasses and hearing aids and use them during testing, as poor eyesight or hearing can lower scores unfairly.
- Write down your questions and any medical words used, so you can look them up later.
- If a scan is planned, mention any pacemaker, metal implants, or difficulty with enclosed spaces.
What happens
At the assessment, the clinician talks with you and, where possible, the person who came with you, about your symptoms, your physical health, your mood and your daily life, and asks about both gradual changes and any vascular events.
You will do pen-and-paper tests covering memory, attention, language, planning and speed. Most people have blood tests, a physical check including blood pressure and often a heart-rhythm check, and a brain scan, which may show features of more than one type of dementia.
The team may give a first impression at the visit, but with mixed dementia in particular the picture often becomes clearer over time. A clear answer usually follows once the scan and blood results are back, and the diagnosis may be refined at review.
If mixed dementia is diagnosed, treatment is guided by the diseases present. A cholinesterase inhibitor or memantine may be considered where there are Alzheimer's features, while vascular risk factors are managed, and support and planning are arranged throughout.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Sudden weakness, slurred speech or facial drooping — this is a possible stroke and is a 999 emergency, not a clinic referral.
- Sudden confusion over hours or days — this points to delirium or a new stroke and needs urgent medical assessment.
- Someone acutely unwell or in pain — treat the illness first, then reassess thinking once they are stable.
- Where untreated depression or another reversible cause is the likely explanation and should be addressed first.
Delay or rearrange if…
- There is a current infection, delirium, recent stroke or recent hospital stay affecting thinking.
- The person is in crisis or too distressed to take part in testing.
- Key information is missing — no collateral history, or an incomplete medication list.
- A heart-rate or heart-rhythm problem needs checking before a cholinesterase inhibitor is started.
- Eyesight or hearing problems would make test scores unreliable until corrected.
Alternatives to discuss
- A GP review to treat reversible causes such as low mood, thyroid problems or vitamin shortage first.
- Focusing on vascular risk-factor control where vascular features predominate.
- Support, cognitive stimulation and planning without medicine, if medicine is not wanted or not tolerated.
- Watchful waiting with planned review, as the mix often becomes clearer over time.
- The NHS pathway rather than private assessment if speed is not the main concern.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Recognises that more than one cause may be at play, which can explain a blend of symptoms
- Guides treatment towards the diseases that are present, including managing vascular risk factors
- Picks up treatable conditions that may be adding to the problems
- Opens access to support, information and benefits for the person and family
- Lets the person plan ahead while they can take part in decisions
- Helps families make sense of symptoms that do not fit a single, tidy pattern
Risks & complications
- Finding the tests tiring or upsetting, and worry while waiting for results
- Distress on hearing the diagnosis
- Uncertainty about how much each disease is contributing
- Needing to start or change several medicines
- A diagnosis that shifts emphasis over time as the picture becomes clearer
- Effects on driving, work and insurance that need to be thought through
- Side effects from medicines for Alzheimer's features or for vascular risk factors
- Family disagreement about the diagnosis or about care
- A wrong or incomplete first diagnosis that is later revised
- A further stroke during or soon after assessment, needing urgent care
The central uncertainty in mixed dementia is that doctors cannot see every disease in a living brain, so the exact mix is judged from the overall pattern and may be refined over time. This makes honest, plain explanation especially important. A sudden new weakness, drooping face or slurred speech is a possible stroke and is a 999 emergency.
Published figures to discuss
The assessment itself is not a procedure with complication rates. Its main uncertainty is diagnostic: the exact combination of diseases cannot be confirmed in a living person, so the diagnosis is based on the overall pattern and may be refined over time. We have not quoted percentages, as a single defensible figure for the contribution of each disease in an individual is not meaningful.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| One dementia type over-simplified | Common in mixed dementia | Alzheimer's and vascular changes often coexist, and management should address both cognition and vascular risk. | NHS — How to get a dementia diagnosisnhs.ukSource-linked context |
| Stroke/TIA risk factors not treated | Avoidable | Blood pressure, diabetes, cholesterol, smoking, atrial fibrillation and exercise matter for vascular contribution. | NHS — How to get a dementia diagnosisnhs.ukSource-linked context |
| Medication expectations unclear | Common | Alzheimer's-type medicines may be considered when Alzheimer's pathology is part of the picture, but benefit is symptomatic. | Guide sourcesClinical context |
| Delirium or depression confounds assessment | Recognised | Fluctuating or sudden decline should not be labelled as dementia progression without checking reversible causes. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from the assessment. What matters afterwards is understanding a sometimes complicated picture, getting the right treatment and support, and planning ahead.
- Feeling tired or low for a day or two after a long assessment
- Needing time to take in a picture that may not fit one tidy label
- Starting or adjusting medicines for Alzheimer's features and for vascular risk factors
- A diagnosis that is refined at later reviews
- Mixed emotions in the person and family — all understandable
Aftercare
- Make sure you understand the diagnosis and the plan; ask for it in writing if that helps.
- Take any medicine as directed, and report side effects rather than stopping suddenly.
- Keep reviews so the benefit of treatment and the control of risk factors can be checked.
- Manage blood pressure, diabetes, cholesterol and heart rhythm as advised, to protect the brain.
- Treat other health problems and look after mood, hearing and eyesight, as these affect thinking.
- Look into support such as an Admiral Nurse or local dementia adviser for the person and family.
- Tell the driving licence authority and your insurer if you are advised this affects driving — this is the DVLA if you live in England, Scotland or Wales, or the DVA if you live in Northern Ireland. Telling them is a legal duty.
- Plan ahead while decisions can be made: lasting power of attorney, finances and future wishes.
- Bring a relative or close friend to appointments
- Full list of current medicines
- Notes on how and when symptoms started
- Details of any stroke, mini-strokes, heart problems or diabetes
- Glasses and hearing aids
- Questions written down in advance
- A way to record what you are told
⚠ Get urgent help if…
- Sudden weakness, facial drooping, slurred speech or loss of vision — call 999, as this could be a stroke
- Sudden confusion or a clear change over hours or days — this may be delirium from illness or a new stroke and needs urgent help
- A sudden severe headache unlike any before
- Fainting, a very slow pulse or chest pain after starting a cholinesterase inhibitor — seek urgent medical advice
- Thoughts of harming yourself, or feeling unable to go on — contact your GP urgently or call Samaritans on 116 123; call 999 if there is immediate danger
- Severe distress or agitation that cannot be settled
- Becoming unsafe alone — for example getting lost or leaving the gas on
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your psychiatrist gives you.
Results & realistic expectations
A good outcome from assessment is an honest explanation that more than one cause may be present, and a plan that addresses each — for example a medicine for Alzheimer's features alongside management of vascular risk factors. With mixed dementia, a 'good' result is often a clearer understanding rather than a single, neat label.
The limits are important. The exact mix cannot be confirmed in a living person, treatment cannot cure or reverse the disease, and benefit from any medicine is judged over time. The diagnosis may be refined as symptoms change.
Mixed dementia is progressive, and its course can combine the gradual decline of Alzheimer's with step-like changes from vascular events. The plan is reviewed over time and the understanding of the mix may evolve. As the condition advances, the focus shifts towards comfort, dignity, support and planning.
Related tests, treatments or support
A mixed dementia assessment naturally combines the approaches used for Alzheimer's disease and for vascular dementia — cognitive testing, a brain scan, and attention to vascular risk factors — together with treatment of any other health problems that affect thinking.
Follow-up & long-term care
After diagnosis, a letter usually goes to your GP, and the clinic agrees who will follow you up. Reviews check symptoms, the benefit of any medicine, and control of vascular risk factors, and may refine the diagnosis. You should be told who to contact between appointments and how to get support.
- Regular review of symptoms, mood, safety and daily living
- Review of any dementia medicine for continued benefit and side effects
- Ongoing control of blood pressure, diabetes, cholesterol and heart rhythm
- Keeping other conditions well managed and looking after hearing and eyesight
- Ongoing support for the person and family, adjusted as needs change
Repeat, follow-on and what comes next
- The diagnosis is often refined over time, with the emphasis shifting between Alzheimer's and vascular features.
- An uncertain assessment may be repeated after several months, as change over time clarifies the picture.
- Medicines for Alzheimer's features are reviewed and may be started, switched or stopped depending on benefit.
- Risk-factor treatment is adjusted over time rather than fixed at diagnosis.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A clear, compassionate explanation that more than one cause may be present, and what that means.
- A named point of contact and a way to ask questions between appointments.
- A plan that addresses both Alzheimer's features and vascular risk factors, with honest review of any medicine.
- Signposting to support for the person and family, such as Admiral Nurses or a local dementia adviser.
- Support with planning ahead and honest, kind advice on driving and legal matters.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Length and number of appointments, and whether a consultant leads the assessment
- The cognitive tests used and any detailed psychological testing
- Blood tests, blood pressure and heart-rhythm checks
- Whether a brain scan (CT or MRI) is arranged, and who reports it
- Any specialist scans needed to clarify the picture
- Follow-up appointments, ongoing treatment, and reports or letters
- The consultant or clinician's fee for assessment and follow-up
- Cognitive testing and any psychology input
- Blood tests, heart-rhythm and blood-pressure checks, and who interprets them
- Any scan fee and the reporting fee
- Ongoing treatment, risk-factor management and prescribing arrangements
- Reports, letters and communication with your GP
- What happens, and what it costs, if the diagnosis is unclear or further tests are needed
On the NHS? Assessment for mixed dementia and its treatment are available on the NHS when clinically indicated; private routes are mostly used for speed, choice or a second opinion.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Being given a single tidy label when the honest answer is that more than one cause is likely.
- A diagnosis from a brief test alone, without a scan or a collateral history.
- No clear plan for who manages vascular risk factors alongside any dementia medicine.
- Not being told that the exact mix cannot be confirmed in a living person.
- Not being told what the diagnosis means for driving, work and insurance, or who sees the report.
Marketing red flags
- Claims that a treatment can cure or reverse dementia of any type.
- A single test or scan sold as confirming exactly which diseases are present.
- Supplements, infusions or unproven treatments promoted as reversing brain damage.
- Pressure to start or pay for treatment without an honest discussion of likely benefit and review.
Choosing a specialist safely
- Check the psychiatrist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the psychiatrist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good psychiatrist will welcome every one of these.
- Which types of dementia do you think are involved, and how sure can you be?
- How does this affect my treatment compared with a single type?
- Which of my vascular risk factors can we treat to protect my brain?
- What did the brain scan and blood tests show?
- What support is available for me and my family, and who do I contact?
- What does this mean for driving, work and planning ahead?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the psychiatrist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
What is mixed dementia?
Why is it harder to diagnose?
Is there a cure?
Will I be offered medicine?
Can I get the assessment on the NHS?
Will this affect my driving?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: Alzheimer's Society — What is mixed dementia? NHS — How to get a dementia diagnosis NICE NG97 — Dementia: assessment, management and support Alzheimer's Society — Types of dementia Dementia UK — How is dementia diagnosed? Royal College of Psychiatrists — Memory problems and dementia DVLA — Assessing fitness to drive DVA Northern Ireland — Tell DVA about a driver medical condition
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: Memory assessment (memory clinic) · Alzheimer's disease assessment and treatment · Vascular dementia assessment · Frontotemporal dementia assessment · Lewy body dementia assessment