Skip to content

Testosterone, Serum (Mass Concentration)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of testosterone, a key hormone in men and women, in your blood serum. Testosterone plays a role in muscle and bone development, sex drive, and overall health.

Quick summary

["Understanding your testosterone levels can help identify hormonal imbalances or conditions affecting your health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
1639-4
Short code
Testost pre 5000 U CG IM SerPl-mCnc
Synonyms
Testost pre 5000 U CG IM SerPl-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like low libido, fatigue, mood changes, or issues with muscle or bone strength. It could also be part of evaluations for infertility, menstrual problems, or other hormonal disorders.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the test if it involves a blood draw. Wear comfortable clothing and plan to stay near the testing site for a short time.

What Happens During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually takes only a few minutes. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to standard ranges for your age, sex, and overall health. Low or high levels may signal conditions like hypogonadism, Cushing’s syndrome, or other hormonal or medical issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Testosterone Level

Frequently asked questions

How often should I get this test?
Testosterone levels can change over time due to age, stress, or other factors. Your provider will determine how often to repeat the test based on your symptoms and medical history.
What are typical reference ranges for testosterone?
Reference ranges vary by lab, age, and sex. For men, they often range from about 300 to 1,000 ng/dL, while women’s ranges are lower, typically between 15 and 70 ng/dL. These are general guidelines and may differ based on your specific needs.
Can lifestyle changes affect my testosterone levels?
Yes, factors like diet, exercise, sleep, and stress can influence testosterone levels. Maintaining a healthy weight, managing stress, and getting adequate sleep may help support balanced hormone function.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy