Niemann-Pick Disease Test
Niemann-Pick Disease Test can be requested without a referral, and this overview covers what to expect. The Niemann-Pick Disease Test helps diagnose a rare inherited condition that affects how the body processes fats. It is ordered when a person has symptoms like an enlarged liver or spleen, developmental delays, or a family history of the disease.
- Sample type
- blood
- Category
- General Wellness
- Turnaround
- 1-3 business days
- Price
- $199
- Referral
- Not required
The Niemann-Pick Disease Test helps diagnose a rare inherited condition that affects how the body processes fats. It is ordered when a person has symptoms like an enlarged liver or spleen, developmental delays, or a family history of the disease.
What it measures
- Acid sphingomyelinase (ASM) enzyme activity — Measures how well this enzyme breaks down fats in cells; low activity can suggest Niemann-Pick disease type A or B.
- Genetic testing for SMPD1 gene mutations — Looks for changes in the gene that provides instructions for making ASM.
- Cholesterol trafficking tests (for type C) — Checks how cells move cholesterol; problems can indicate Niemann-Pick disease type C.
- NPC1 and NPC2 gene mutations — Identifies gene changes linked to type C when other tests are unclear.
Who it is for
A doctor may order this test for someone with unexplained liver or spleen enlargement, neurological symptoms, or a family history of Niemann-Pick disease. It is not a routine screening test.
Preparation
No fasting or special preparation is usually needed for this blood test. Follow any instructions from your healthcare provider.
Results and what they mean
Results are reported as enzyme activity levels or as positive or negative for gene mutations. A specialist interprets these results along with symptoms and other tests. This is general information, not medical advice; talk with your clinician about your results.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the niemann-pick disease test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Is this test painful?
It uses a standard blood draw from a vein, which may cause brief discomfort.
How long do results take?
Typically 1 to 3 business days, but genetic testing may take longer.
Can I eat before the test?
Yes, fasting is not required unless your provider says otherwise.
Does a positive result mean I have the disease?
Not always; results are interpreted with your symptoms and family history by a specialist.