General
Testosterone (MS)
Lab test

Testosterone (MS)

Ordered for men and women with symptoms that may reflect low or abnormal testosterone — including fatigue, reduced libido, muscle loss, or mood changes — and for those on hormone therapy who require precise monitoring. Morning testing is recommended. No fasting required. Results reviewed by a General Medicine clinician.

Receive actionable insights and deep analysis—not just lab values– in as little as 48 hours

Clear guidance, and follow-up care available

Simple, online scheduling for labs and everything else

Most insurance accepted

Board-certified

No hidden fees

Available nationwide

What is a Testosterone (MS) Test?

The Testosterone (MS) test uses mass spectrometry — the most accurate and precise method available — to measure total testosterone in the blood. Mass spectrometry is significantly more reliable than standard immunoassay methods, particularly at low levels, making it the gold standard for diagnosing testosterone deficiency and monitoring hormone therapy.

Accurate testosterone measurement

Mass spectrometry provides greater precision than standard immunoassay testing — critical for detecting low testosterone in women and borderline levels in men where immunoassay results may be unreliable or misleading.

Diagnosis of low testosterone

Total testosterone is the primary diagnostic marker for hypogonadism in men and androgen deficiency in women — both associated with fatigue, low libido, reduced muscle mass, mood changes, and cognitive symptoms.

Hormone therapy monitoring

For people on testosterone replacement or optimization therapy, the MS method provides the precise measurements needed to confirm that dosing is achieving target levels without over- or under-replacement.

Complete insights in as little as 48 hours

1

Book your test

Instantly schedule at 2,000+ labs nationwide, at a time that works for you. Most visits take 15 minutes or less, with both walk-ins and appointments available.

2

Get results in 48 hours

Your results are delivered quickly—and reviewed by medical professionals. You’ll get clear explanations, robust health insights, and recommended next steps tailored to your health needs.

3

Take action with physician guidance

Choose to review your results and manage your plan with a General Medicine physician—or simply use the insights on your own.

4

Track progress over time

Repeat annually to see trends, improvements, and new emerging risks or book individual tests that focus on your set goals

All your care in one place. That’s the General Medicine difference.

We help you understand your options, connect you to the right clinicians, manage prescriptions, coordinate any needed evaluations, and keep an eye on your overall health along the way. It’s comprehensive care that looks at the full picture — your goals, your history, your lifestyle — and makes it simple to move forward with confidence.

Your care plan
Clinician

What's included

Test type

Blood sample

Collection method

Venipuncture

Fasting

Not required

Results processing time

1 to 2 days

Total Testosterone

A key hormone that supports muscle mass, energy, and sex drive. Abnormal levels can affect mood, strength, and overall health.

Virtual visit with clinician

Ongoing support, always available.

You’ll be supported by experienced clinicians who care for a wide range of health needs, from everyday concerns to more complex conditions.

Our clinicians track your progress over time and adjust your care as needed. If medication is prescribed, we’ll manage dosing and monitor for side effects. If lab testing is recommended, we review results and refine your plan accordingly. You’re never left to navigate care on your own.

What our customers have to say

Hear from people who felt heard, understood, and supported on General Medicine.

I found the ease of setting the appointment and how quickly I was able to be seen to be amazing. The physician was very friendly and amazingly helpful.

Natalie, Texas

The chat visit was super convenient. The doctor was friendly and took the time needed to answer any questions I had. The prescription I needed was called in and ready the same afternoon.

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Ann, Florida

General Medicine is easily the most approachable, efficient, high-quality, and responsive care team I've had the pleasure of working with.

John, Utah

General Medicine helped me get the imaging and blood work I needed, referred me to the right specialists, and even helped me find a new family doctor.

Bridget, Mississippi

Order your lab today.

Frequently asked questions

What is the difference between a standard testosterone test and the Testosterone (MS) test?

The MS (mass spectrometry) method is significantly more accurate and precise than standard immunoassay testosterone tests — particularly for measuring low testosterone levels and free testosterone. It's the method recommended by clinical guidelines for diagnostic purposes when accuracy matters most.

Do I need to fast before a testosterone test?

Fasting is not strictly required, but testosterone levels are typically highest in the morning. Testing between 7–10 AM is recommended for the most clinically relevant results, as levels naturally decline through the day by 20–30%.

What symptoms suggest I should get my testosterone tested?

Low energy, reduced libido, difficulty building muscle, mood changes, brain fog, increased body fat, and erectile dysfunction in men are common reasons to test. In women, low testosterone can contribute to fatigue, low libido, and reduced muscle tone.

Can women benefit from testosterone testing?

Yes — testosterone plays an important role in female health, including energy, sexual desire, bone density, and mood. Women with unexplained fatigue, low libido, or symptoms despite normal estrogen and thyroid levels may benefit from testosterone assessment.

What if my levels are low — what are my options?

Treatment depends on your levels, symptoms, and overall health picture. A General Medicine clinician can review your results and discuss whether testosterone therapy, lifestyle changes, or further evaluation is appropriate for your situation.