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Atorvastatin-Induced Platelet-Associated IgM, Serum/Plasma — Qualitative, Flow Cytometry

Published: August 9, 2026Updated: August 17, 2026

A specialized test that looks for IgM antibodies reacting with platelets in the presence of atorvastatin.

Quick summary

["A positive result can support atorvastatin-related immune thrombocytopenia, a potentially serious low-platelet reaction."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
73512-6
Short code
Atorvastatin ind plt IgM SerPl Ql FC
Synonyms
Atorvastatin ind plt IgM SerPl Ql FC
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
84484
SNOMED
302774002
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

What is this test?

This is a specialized blood test that looks for IgM antibodies that react with platelets when atorvastatin is present. It is used to help evaluate a suspected immune reaction to atorvastatin rather than to measure the amount of atorvastatin in the blood.

Why might I need this test?

It may be ordered if you developed a low platelet count, unusual bruising, nosebleeds, or bleeding after starting atorvastatin. These findings can occur with several conditions, so the result is interpreted along with your symptoms, medication history, and other laboratory tests.

How is the test performed?

A blood sample is collected and processed into serum or plasma. A laboratory method using flow cytometry evaluates whether the sample reacts with platelets in the presence of atorvastatin.

How do I prepare for the test?

There is usually no fasting requirement, but you should tell the laboratory and your clinician about all medications you take, including atorvastatin. Do not stop your medication without medical advice, and be sure to report the timing of symptoms and any recent changes in treatment.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Atorvastatin platelet IgM antibodies

Frequently asked questions

Does this test measure the atorvastatin level in my blood?
No. It looks for an immune reaction involving atorvastatin and platelets, not simply the concentration of atorvastatin in the blood.
What symptoms suggest this test may be needed?
The test may be considered with unexplained bruising, bleeding, petechiae, or a low platelet count after starting atorvastatin. Severe bleeding, weakness, or a sudden change in symptoms requires prompt medical attention.
Should I stop taking atorvastatin before the test?
Do not stop it on your own unless your clinician instructs you to do so. The laboratory needs accurate information about your medication use and symptom timing to interpret the result.
  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 17, 2026. · Read our editorial policy