??A positive Anti-CCP blood test can provide strong evidence supporting rheumatoid arthritis when the result fits with inflammatory joint symptoms. It does not, however, diagnose rheumatoid arthritis on its own.
Equally important, a negative Anti-CCP result does not rule rheumatoid arthritis out.
That distinction matters because rheumatoid arthritis is ultimately diagnosed from the wider clinical picture: symptoms, joint examination, antibody results, inflammatory markers and, where appropriate, imaging.
Anti-CCP antibodies are particularly useful because they are more specific for rheumatoid arthritis than rheumatoid factor. They can also provide information about the risk of future joint damage in people who have already been diagnosed.
For people who require targeted private testing, London Blood Tests offers an Anti-CCP Antibodies (RF) blood test with clinic and home collection options and a current listed turnaround of approximately one business day.
What Is an Anti-CCP Blood Test?
Anti-CCP stands for anti-cyclic citrullinated peptide antibodies.
These are autoantibodies directed against citrullinated proteins and peptides.
Citrullination is a normal biochemical process in which the amino acid arginine within certain proteins is converted into citrulline. In rheumatoid arthritis, the immune system may begin recognising some citrullinated proteins as targets and produce antibodies against them.
An Anti-CCP blood test detects these antibodies in the blood.
You may also see the test described as:
· CCP blood test
· Anti-CCP antibody test
· Anti-cyclic citrullinated peptide antibody test
· CCP antibodies
These terms generally refer to the same group of rheumatoid arthritis-associated autoantibodies.
What Is the Anti-CCP Blood Test Used For?
The test is mainly used when rheumatoid arthritis is suspected.
Rheumatoid arthritis is an autoimmune inflammatory disease in which the immune system attacks tissues within and around the joints. Without appropriate management, persistent inflammation can eventually contribute to joint damage.
An Anti-CCP result is therefore most meaningful when a person has symptoms suggestive of inflammatory arthritis.
These may include persistent joint swelling, prolonged morning stiffness, pain affecting several joints, or inflammatory symptoms involving the smaller joints of the hands and feet.
Anti-CCP should not be treated as a general screening test for everyone experiencing aches, fatigue or occasional joint discomfort.
The clinical pattern matters.
Does a Positive Anti-CCP Blood Test Mean Rheumatoid Arthritis?
A positive Anti-CCP blood test provides important supporting evidence for rheumatoid arthritis, particularly when characteristic joint symptoms are also present.
But it is not a standalone diagnosis.
A clinician still needs to assess whether the symptoms and examination findings are compatible with rheumatoid arthritis or another inflammatory joint condition.
This distinction is important because blood-test results do not show whether a joint is genuinely swollen from synovitis, how many joints are involved, how long symptoms have been present or whether another condition might better explain them.
The Anti-CCP result adds evidence.
It does not replace clinical examination.
Can Anti-CCP Be Positive Before Rheumatoid Arthritis Is Diagnosed?
Anti-CCP antibodies can sometimes be detectable relatively early in rheumatoid arthritis and may, in some people, be present before the disease becomes clinically established.
This makes the antibody useful when early inflammatory arthritis is being investigated.
However, a positive result in someone without clear inflammatory symptoms should still be interpreted cautiously.
It does not allow an exact prediction of whether rheumatoid arthritis will develop, when it might develop or how severe it would eventually become.
Someone with positive Anti-CCP antibodies and new inflammatory joint symptoms therefore requires a different clinical assessment from someone who feels well and has had the antibody detected unexpectedly.
Can You Have Rheumatoid Arthritis With a Negative Anti-CCP Test?
Yes. A negative Anti-CCP blood test does not rule out rheumatoid arthritis.
Some people with rheumatoid arthritis do not have detectable Anti-CCP antibodies.
Some are also negative for rheumatoid factor.
When rheumatoid arthritis occurs without detectable Anti-CCP or rheumatoid factor, it may be described as seronegative rheumatoid arthritis.
This is one reason blood tests must never be used as a reason to dismiss convincing inflammatory joint symptoms.
NICE specifically advises that adults with suspected persistent synovitis should be referred for specialist assessment even when Anti-CCP antibodies and rheumatoid factor are negative and inflammatory markers are normal.
That is a clinically important point.
Negative blood tests do not override persistent inflammatory joint findings.
Anti-CCP vs Rheumatoid Factor: What Is the Difference?
This is one of the most common areas of confusion when people investigate a rheumatoid arthritis blood test.
Anti-CCP and rheumatoid factor are different antibodies.
Anti-CCP Antibodies
Anti-CCP antibodies target citrullinated proteins and are strongly associated with rheumatoid arthritis.
They are generally considered more specific for rheumatoid arthritis than rheumatoid factor.
Rheumatoid Factor
Rheumatoid factor, or RF, is another autoantibody commonly checked during rheumatoid arthritis assessment.
RF can be found in rheumatoid arthritis, but it can also occur in other autoimmune conditions, chronic infections and some people without rheumatoid arthritis.
London Blood Tests offers a separate Rheumatoid Factor Blood Test where RF alone is required.
Why Test Both?
The two tests can provide complementary information.
Some people with rheumatoid arthritis are Anti-CCP positive but RF negative. Others may have the opposite pattern. Some have both antibodies, while seronegative rheumatoid arthritis can occur when neither is detected.
For a combined assessment, the Rheumatology Profile 6 (Rheumatoid Plus) includes Anti-CCP antibodies, rheumatoid factor and CRP.
That gives a broader picture than testing a single antibody alone.
An Important Point About the London Blood Tests Anti-CCP Product
The current London Blood Tests product is named Anti-CCP Antibodies (RF).
However, the laboratory profile itself currently measures one biomarker: Anti-CCP antibodies.
Rheumatoid factor is not included within that standalone one-marker test.
This distinction is worth making clear because Anti-CCP and RF are separate laboratory measurements.
If both are required, rheumatoid factor can be ordered separately or the Rheumatology Profile 6 (Rheumatoid Plus) can be used, which currently includes:
· Anti-CCP antibodies
· Rheumatoid factor
· C-reactive protein (CRP)
Choosing between them depends on what information is actually required.
Anti-CCP, CRP and ESR: Do They Measure the Same Thing?
No.
Anti-CCP is an autoantibody test.
CRP and ESR are inflammatory markers.
They answer different questions.
Anti-CCP asks whether rheumatoid arthritis-associated autoantibodies are detectable.
CRP and ESR provide information about inflammation in the body but cannot identify rheumatoid arthritis specifically.
Someone with rheumatoid arthritis may have raised inflammatory markers during active inflammation, but normal CRP or ESR does not completely exclude the disease.
Similarly, a raised CRP does not mean rheumatoid arthritis is present.
CRP may rise with infection, injury and many other inflammatory conditions.
For a more detailed explanation, read our guide to CRP and ESR Blood Tests: Inflammation and Infection.
What Does a High Anti-CCP Result Mean?
Laboratories may report Anti-CCP numerically together with their own reference range or interpretative threshold.
A result above the laboratory's positive threshold indicates that Anti-CCP antibodies have been detected.
Higher concentrations may strengthen the clinical evidence for rheumatoid arthritis when compatible symptoms are present.
Anti-CCP positivity in established rheumatoid arthritis is also associated with a greater risk of radiographic joint damage or erosive progression.
However, this does not mean that an individual result can predict exactly how severe someone's rheumatoid arthritis will become.
It is a risk indicator, not a guaranteed prognosis.
The correct reference range is also the one supplied by the laboratory performing your test.
Different assays can use different methods and cut-offs, so a result should not be compared with an arbitrary number found online.
Does a Higher Anti-CCP Result Mean More Severe Rheumatoid Arthritis?
Not necessarily in a simple one-to-one way.
Anti-CCP positivity is associated with an increased risk of radiological progression in rheumatoid arthritis, which is why the result can have prognostic value.
But the antibody concentration itself does not function like a disease-activity score.
A result that is twice as high does not mean someone has twice as much active arthritis.
Current disease activity is assessed using the wider clinical picture, including swollen and tender joints, symptoms, inflammatory markers and specialist assessment.
This distinction becomes particularly important after rheumatoid arthritis has already been diagnosed.
Is Anti-CCP Used to Monitor Rheumatoid Arthritis Treatment?
Generally, Anti-CCP is more useful for diagnosis and prognosis than for routine monitoring of day-to-day disease activity.
The antibody does not necessarily rise and fall in a way that reliably reflects how active the arthritis is at a particular moment.
Monitoring rheumatoid arthritis instead relies on clinical assessment together with markers and disease-activity measures appropriate to the person's treatment.
CRP, for example, may sometimes be used as part of monitoring inflammatory activity.
This is another reason repeatedly ordering Anti-CCP simply to see whether the number has gone down may provide limited useful information.
Testing should have a clear clinical purpose.
What Symptoms Make Rheumatoid Arthritis More Suspicious?
Joint pain is extremely common.
Most joint pain is not automatically rheumatoid arthritis.
The symptoms become more suggestive of inflammatory arthritis when there is persistent swelling, prolonged stiffness and a characteristic pattern of joint involvement.
Rheumatoid arthritis commonly involves smaller joints in the hands, wrists and feet and can affect similar joints on both sides of the body.
Morning stiffness that persists rather than resolving within a few minutes may also raise suspicion.
Other people experience fatigue or more general symptoms alongside their joint problems.
However, fatigue alone is not an indication for Anti-CCP screening.
The physical finding of persistent synovitis—inflammation and swelling of the joint lining—is particularly important.
If persistent joint swelling is present, medical assessment should not be delayed while waiting for antibody results.
Why Early Assessment Matters
Rheumatoid arthritis can cause progressive joint damage when inflammatory disease remains uncontrolled.
This is why NICE places particular importance on early specialist referral.
Adults with suspected persistent synovitis should be referred urgently when the small joints of the hands or feet are affected, more than one joint is involved, or there has already been a delay of three months or more between symptom onset and seeking medical advice.
Crucially, referral should still take place even if:
· Anti-CCP is negative
· Rheumatoid factor is negative
· CRP or other acute-phase markers are normal
This is an important distinction between appropriate medical investigation and simply ordering blood tests.
Blood testing can support diagnosis.
It should not delay specialist assessment when the clinical features are concerning.
What Happens After a Positive Anti-CCP Result?
The next step depends on whether inflammatory symptoms are present and whether rheumatoid arthritis has already been diagnosed.
Positive Anti-CCP With Persistent Joint Swelling
Clinical assessment becomes important.
A GP or rheumatology specialist may assess the affected joints, symptom pattern and duration, together with rheumatoid factor and inflammatory markers.
Where rheumatoid arthritis is suspected, imaging may also form part of the investigation.
Positive Anti-CCP With Positive Rheumatoid Factor
Having both antibodies can provide stronger serological support for rheumatoid arthritis in the appropriate clinical context.
This still does not replace joint examination or specialist diagnosis.
Positive Anti-CCP Without Clear Symptoms
The result should be interpreted carefully rather than assuming rheumatoid arthritis is already present.
Medical history, examination and follow-up may be more informative than repeatedly testing the same antibody.
Anti-CCP Negative but Symptoms Continue
Persistent inflammatory joint symptoms still require assessment.
A negative Anti-CCP test does not exclude rheumatoid arthritis or other inflammatory arthritides.
This is particularly important when visible joint swelling or persistent synovitis is present.
What Is Seronegative Rheumatoid Arthritis?
Seronegative rheumatoid arthritis generally refers to rheumatoid arthritis in which rheumatoid factor and Anti-CCP antibodies are not detectable.
The absence of these antibodies can make diagnosis more challenging because clinicians cannot rely on the same serological evidence.
Diagnosis then depends even more heavily on the pattern of joint inflammation, examination findings, inflammatory markers and imaging.
The possibility of seronegative disease is one reason a person with convincing persistent synovitis should not be reassured solely because their antibody tests are negative.
Blood testing supports the clinical assessment.
It does not replace it.
Can Anti-CCP Distinguish Rheumatoid Arthritis From Osteoarthritis?
Anti-CCP can provide useful evidence when rheumatoid arthritis is suspected, but it should not be viewed as a direct "RA versus osteoarthritis" switch.
Osteoarthritis is primarily a degenerative joint condition and does not usually produce the same autoimmune antibody pattern.
However, determining the cause of joint symptoms still requires clinical assessment.
Pain, stiffness, swelling, age, distribution of affected joints, examination and imaging may all contribute.
A positive Anti-CCP result can strongly support rheumatoid arthritis in the correct setting.
A negative result does not prove that joint symptoms are osteoarthritis.
Do You Need to Fast for an Anti-CCP Blood Test?
No specific fasting preparation is generally required for Anti-CCP antibody testing.
You can usually eat and drink normally before your appointment.
Staying normally hydrated can make blood collection easier.
If Anti-CCP is being tested alongside other biomarkers, one of the additional tests may have separate preparation requirements.
Follow the instructions supplied for the complete panel being collected.
There is also no specific requirement for Anti-CCP to be collected at a particular time of day.
Should You Stop Arthritis Medication Before the Test?
No prescribed medication should be stopped simply to try to alter an Anti-CCP result.
Corticosteroids, anti-inflammatory medicines, disease-modifying antirheumatic drugs and other prescribed treatments should only be changed on medical advice.
If you already have diagnosed rheumatoid arthritis or inflammatory arthritis, provide your clinician with details of your current medication when the result is being interpreted.
The purpose of testing is to understand your genuine clinical situation—not to create an artificial result by withholding treatment.
How Long Do Anti-CCP Blood Test Results Take?
Turnaround varies between laboratories.
The current London Blood Tests Anti-CCP Antibodies (RF) blood test has a listed turnaround of approximately one business day after the sample reaches the laboratory.
The test currently measures one biomarker: Anti-CCP antibodies.
Samples can be collected through an in-clinic appointment or home/hotel phlebotomy where available.
Turnaround begins from laboratory receipt and can occasionally be extended by repeat analysis, quality checks or sample-related issues.
What Does the London Blood Tests Anti-CCP Test Include?
The standalone Anti-CCP Antibodies (RF) Blood Test currently measures:
Anti-CCP Antibodies
The current listed price is £90.99, excluding the applicable sample-collection charge, and the expected turnaround is approximately one business day.
Despite RF appearing in the product name, rheumatoid factor is not included in this one-marker laboratory profile.
If rheumatoid factor is also required, London Blood Tests offers a separate Rheumatoid Factor Blood Test.
Alternatively, the Rheumatology Profile 6 (Rheumatoid Plus) combines Anti-CCP antibodies, rheumatoid factor and CRP in one profile.
That distinction helps avoid ordering duplicate or unnecessary tests.
Private Anti-CCP Blood Testing in London
London Blood Tests provides private Anti-CCP blood testing in London for people who require targeted rheumatoid arthritis-associated antibody testing.
The standalone Anti-CCP test can be useful when the biomarker has specifically been requested, particularly when rheumatoid factor has already been measured.
Where a broader rheumatoid arthritis assessment is required, the Rheumatology Profile 6 (Rheumatoid Plus) combines Anti-CCP, rheumatoid factor and CRP.
For people who only need RF, the Rheumatoid Factor Blood Test is also available separately.
Private testing can provide convenient access to laboratory investigations, but persistent swollen joints or suspected synovitis require clinical assessment regardless of antibody results.
Especially in rheumatoid arthritis, a negative blood test should not delay appropriate referral.
Frequently Asked Questions About Anti-CCP Blood Tests
What is an Anti-CCP blood test?
An Anti-CCP blood test detects antibodies against cyclic citrullinated peptides. These autoantibodies are strongly associated with rheumatoid arthritis and can support investigation when inflammatory joint disease is suspected.
What does CCP mean in a blood test?
CCP stands for cyclic citrullinated peptide. The test looks for antibodies produced by the immune system against citrullinated proteins.
Does a positive Anti-CCP result confirm rheumatoid arthritis?
No. A positive result can provide strong supporting evidence, particularly when inflammatory joint symptoms are present, but rheumatoid arthritis is diagnosed using the wider clinical picture.
Can you have rheumatoid arthritis with negative Anti-CCP?
Yes. Some people with rheumatoid arthritis have no detectable Anti-CCP antibodies, and some are also negative for rheumatoid factor.
What is seronegative rheumatoid arthritis?
Seronegative rheumatoid arthritis refers to rheumatoid arthritis occurring without detectable Anti-CCP antibodies or rheumatoid factor.
What is the difference between Anti-CCP and rheumatoid factor?
They are different autoantibodies. Anti-CCP is generally more specific for rheumatoid arthritis, while rheumatoid factor can occur in RA as well as several other diseases and some people without RA.
Is Anti-CCP better than rheumatoid factor?
They provide complementary information rather than one universally replacing the other. Anti-CCP is more specific for rheumatoid arthritis, while NICE recommends rheumatoid factor as an initial antibody investigation in adults with suspected RA and synovitis, with Anti-CCP considered particularly when RF is negative.
Can Anti-CCP show how active rheumatoid arthritis is?
Not reliably. Anti-CCP is more useful diagnostically and prognostically than as a routine measure of current disease activity.
Does a high Anti-CCP result mean severe rheumatoid arthritis?
Anti-CCP positivity is associated with greater risk of radiographic progression, but an individual antibody concentration cannot predict exactly how severe someone's disease will become.
Do you need to fast for an Anti-CCP test?
Usually not. Anti-CCP antibody testing generally requires no special fasting preparation.
How long does an Anti-CCP blood test take?
The London Blood Tests standalone Anti-CCP test currently lists a laboratory turnaround of approximately one business day after the sample reaches the laboratory.
What other tests may be useful with Anti-CCP?
Depending on the clinical situation, rheumatoid factor, CRP, ESR and imaging may provide additional information.
Can CRP be normal in rheumatoid arthritis?
Yes. Normal inflammatory markers do not completely exclude rheumatoid arthritis. Persistent synovitis should still be clinically assessed even when CRP, Anti-CCP or rheumatoid factor are normal or negative.
The Bottom Line
An Anti-CCP blood test is one of the most useful antibody tests available when rheumatoid arthritis is being investigated.
A positive result can provide strong supporting evidence, particularly when persistent inflammatory joint symptoms are present.
But it is not a diagnosis.
And a negative result is not an exclusion.
Some people with rheumatoid arthritis have negative Anti-CCP and rheumatoid factor results, which is why persistent synovitis, swollen joints and other suggestive symptoms still require medical assessment.
Anti-CCP is also different from CRP, ESR and rheumatoid factor. Each provides a different piece of information.
For private testing in London, London Blood Tests offers a targeted Anti-CCP Antibodies Blood Test, a separate Rheumatoid Factor test and the combined Rheumatology Profile 6 when Anti-CCP, RF and CRP are required together.
The purpose of testing should not be to find one laboratory number that proves or disproves rheumatoid arthritis.
It should be to add the right evidence to the wider clinical picture.
Independent Medical Sources
NICE — Rheumatoid arthritis in adults: management
NHS — Rheumatoid arthritis diagnosis
Oxford University Hospitals — CCP Antibodies
London Blood Tests Services Mentioned