Uric Acid

Cleveland HeartLab Standard Laboratory Tests, Test, U

CPT Code: 84550
Order Code: C161
ABN Requirement:  No
Synonyms: UA; Uric A
Specimen: Serum
Volume: 0.5 mL
Minimum Volume: 0.2 mL
Container: Gel-barrier tube (SST, Tiger Top)


  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 5 times immediately after draw. DO NOT SHAKE.
  3. Allow blood to clot 30 minutes.
  4. Centrifuge for 10 minutes.

Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.


Ambient (15-25°C): not acceptable
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 6 months
Deep Frozen (-70°C): 6 months

Causes of Rejection: Specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits

Methodology: Enzymatic colorimetric test

Turn Around Time: 1 to 3 days

Reference Range:

Age Male
All Ages 3.2-8.6 2.5-7.3

Critical Values

Age Critical Value mg/dL
All Ages >13.0

Intended Use: Uric acid testing is performed to diagnose gout and other metabolic disorders.

Limitations: Calcium dobesilate causes artificially low uric acid results. Purine derivatives, such as uricase, can inhibit the uric acid reaction. In very rare cases gammopathy may cause unreliable results. Uricase reacts specifically with uric acid. Other purine derivatives can inhibit the uric acid reaction. Acetaminophen use can falsely decrease test results.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.