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Uric Acid in Serum or Plasma

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

This test measures the amount of uric acid, a natural substance produced when your body breaks down certain foods and substances, including purines found in meat and seafood.

Quick summary

["Uric acid levels help assess kidney function and potential risk for gout or kidney stones."]

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

Key facts at a glance

LOINC
73539-9
Short code
Allopurinol ind plt IgM SerPl Ql FC
Synonyms
Allopurinol ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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 Is Done

Your doctor may order this test to check for conditions like gout, kidney disease, or to monitor treatment for conditions that affect uric acid levels. It can also help diagnose or evaluate kidney function and the risk of forming kidney stones.

What to Expect Before the Test

No special preparation is needed. You may be asked to fast for 8–12 hours before the test if your blood is drawn early in the morning, but this is not always required. Bring any medications you’re currently taking to your appointment.

How the Test Is Performed

A healthcare provider will collect a blood sample from a vein in your arm using a small needle. The sample is sent to a lab for analysis.

What the Results Mean

Results are compared to a general reference range, but individual ranges may vary by lab. High levels may indicate conditions like gout or kidney issues, while very low levels could suggest certain metabolic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated uric acid levels are often associated with gout, kidney stones, or kidney disease. Low levels may raise concerns about metabolic disorders or malabsorption issues. Your doctor will interpret results in the context of your overall health and symptoms.

Short name

Uric Acid

Frequently asked questions

What causes uric acid levels to be too high?
High uric acid levels can result from diet (rich in purines), certain medications, kidney problems, or metabolic conditions. Lifestyle factors like obesity or dehydration may also play a role.
How long does it take to get test results?
Results are typically available within 1–3 business days, depending on your lab and healthcare provider. Follow-up may be scheduled if additional testing or evaluation is needed.
Can diet changes affect uric acid test results?
Yes, diet—especially high-purine foods—can influence uric acid levels. Avoiding alcohol, limiting red meat, and staying hydrated may help lower levels, but your doctor will guide personalized recommendations.
  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