Is APTT 64 high, normal or dangerous? What does APTT level 64 mean?

📅 Medical Review Date: November 23, 2025

Your APTT level of 64 is a High APTT level.

High APTT levels may indicate underlying health problems. The normal range is typically between 22 seconds and 35 seconds. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal APTT range for men is :22 - 35 seconds

Ideal values of APTT depending on age (male) :

Age	Ideal APTT value
<5 years	23.408
5-10 years	24.906
10-15 years	26.5
15-20 years	28.196
20-25 years	30.001
25-30 years	31.921
30-35 years	33.964
35-40 years	33.825
40-45 years	33.687
45-50 years	33.549
50-55 years	33.411
55-60 years	33.274
60-70 years	33.138
70-80 years	33.002
80-90 years	32.867
90-100 years	34.97
>100 years	34.827

*Ideal values are calculated based on our database of patient records

Get Advice via Email : Send us your blood test report, and our APTT experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides APTT, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Some examples of conditions that increase or decrease APTT levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Willebrand disease

Receive world-class medical opinion about your high APTT levels over email.Upload blood test report now

Normal range of APTT found among women :22-35 seconds

Ideal values of APTT depending on age (female) :

Age	Ideal APTT value
<5 years	23.45
5-10 years	24.996
10-15 years	26.644
15-20 years	28.4
20-25 years	30.272
25-30 years	32.268
30-35 years	34.395
35-40 years	34.245
40-45 years	34.096
45-50 years	33.948
50-55 years	33.801
55-60 years	33.654
60-70 years	33.507
70-80 years	33.362
80-90 years	33.217
90-100 years	33.073
>100 years	32.929

If you take a APTT blood test and the results are not in the normal range (22-35 seconds), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the APTT Test Is Done :

When your doctor orders a APTT test, it involves a straightforward blood draw to measure your APTT levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your APTT test results are usually available within a few hours.

Medical References

• WebMD – Activated Partial Thromboplastin Time (APTT) Test
• Cleveland Clinic – Partial Thromboplastin Time (PTT) Test
• NIH – Solutions to Establishing and Verifying Normal Reference Intervals and Assessing APTT Reagents