Is APTT 39 high, normal or dangerous? What does APTT level 39 mean?

📅 Medical Review Date: December 14, 2025

Your APTT level of 39 is a High APTT level.

An APTT level of 39 seconds usually means blood takes longer than normal to clot. It suggests a bleeding disorder. High levels of APTT can cause excessive bleeding from cuts, easy bruising, nosebleeds, bleeding gums, heavy menstrual bleeding, and blood in urine or stool. This can be caused by hemophilia, liver disease, vitamin K deficiency, or certain medications. Further tests are often needed to identify the cause and guide appropriate treatment.

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	22.858
5-10 years	23.749
10-15 years	24.675
15-20 years	25.637
20-25 years	26.637
25-30 years	27.676
30-35 years	28.755
35-40 years	29.876
40-45 years	31.041
45-50 years	32.252
50-55 years	33.51
55-60 years	34.817
60-70 years	34.764
70-80 years	34.711
80-90 years	34.658
90-100 years	34.606
>100 years	34.554

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

Misdiagnosis is more common than people think—and the consequences can be serious. Delayed treatment, unnecessary medication, or worse. If you want a second opinion on your blood work, one option is to upload it to a site like wholebodyprotocol.com, where world-class doctors review your results. They charge a small fee—around $90 (though you'll want to check the latest price as it fluctuates)—and email you a detailed report. With over 12 million people affected by misdiagnosis every year, that little bit of extra peace of mind can go a long way.

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

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

Ideal values of APTT depending on age (female) :

Age	Ideal APTT value
<5 years	22.884
5-10 years	23.803
10-15 years	24.759
15-20 years	25.754
20-25 years	26.789
25-30 years	27.865
30-35 years	28.984
35-40 years	30.148
40-45 years	31.359
45-50 years	32.619
50-55 years	33.929
55-60 years	33.874
60-70 years	33.82
70-80 years	33.766
80-90 years	33.711
90-100 years	33.656
>100 years	33.602

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