Update Type: Reference range changed
Test Updated: 07/19/2023
Test Overview
Test Methodology

Colorimetric Enzyme Assay

Test Usage

The over-production or underutilization of lactate usually results in lactic acidosis. Increased lactate levels can occur due to tissue hypoxia, diabetes mellitus, malignancies, glycogen storage disease, metabolic acidosis, and ethanol, methanol or salicylate ingestion.

Reference Range *

0.5-2.0 mEq/l (0.5-2.0 mMol/l)

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
MiChart Code
Lactic Acid
  • Blood Lactate
  • Lactate Plasma
Chemical Pathology
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

It is recommended to draw lactic acid without a tourniquet or immediately after applying the tourniquet. If the tourniquet is applied for an extended time, remove the tourniquet and let the blood circulate two minutes prior to retrying the draw. Collect specimen in gray top tube. Invert tube gently to mix. Place specimen on ice. Centrifuge, aliquot plasma into a plastic vial within 15 minutes of collection and freeze immediately.

Special Handling

No tourniquet. Place on ice immediately and deliver to lab or aliquot within 15 minutes. DO NOT FREEZE WHOLE BLOOD SPECIMEN.

Normal Volume
1 mL plasma
Minimum Volume
0.5 mL plasma
CPT Code
Fee Code