A testosterone level of 8.3 definitely indicates a high degree of testosterone deficiency. That is a very low testosterone level, almost that of a man that has been castrated and has little or no ability to produce testosterone at all. Even women have a higher level of testosterone than 8.3. Testosterone levels are measured in nanograms per deciliter (ng/dl). The normal range for adult males is about 200 to 950 ng/dl. For women, it is about 8 – 60. At any age, a level of 8.3 in a male is an extremely low testosterone level, and medical attention should be sought.