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Test ID LACS1 Lactate, Plasma

Ordering Guidance

This test does not measure D-lactate, an uncommon, often undiagnosed cause of lactic acidosis. If D-lactate testing is needed, order DLAC / D-Lactate, Plasma.

Necessary Information

Patient's age and sex are required.

Specimen Required

Collection Container/Tube: Grey top (potassium oxalate/sodium fluoride)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Collection must be at least 1 mL in a 2-mL collection tube or at least 2 mL in a 4-mL collection tube.

2. Centrifuge and aliquot plasma into plastic vial.

Useful For

Diagnosing and monitoring patients with lactic acidosis

Method Name


Reporting Name

Lactate, P

Specimen Type

Plasma NaFl-KOx

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma NaFl-KOx Refrigerated (preferred) 14 days
  Ambient  8 hours

Reference Values

0-90 days (<3 months): ≤3.3 mmol/L

3-24 months: ≤3.1 mmol/L

>24 months-18 years: ≤2.2 mmol/L

>18 years: 0.5-2.2 mmol/L

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
LACS1 Lactate, P 2524-7


Result ID Test Result Name Result LOINC Value
LACS1 Lactate, P 2524-7