Lactate Dehydrogenase Isoenzymes

Test code

597

CPT code(s)*

83625

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Clinical significance

Lactate Dehydrogenase Isoenzymes - Lactate dehydrogenase (LD) is present in many different organs and tissues such as liver, heart, muscles, kidney, lungs and blood. The usual designation of isoenzymes is LD-I, LDII, LD-III, LD-IV and LD-V. LD isoenzymes tissue specificity is derived from the fact that LD subunits are synthesized in well-defined ratios and could be used in investigating unexplained causes of Total LD elevations and detection of macro-LD. Do not use LD isoenzymes to detect myocardial injury.

Test resources

None found for this test
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Details

Test details

Includes

LD1, LD2, LD3, LD4, LD5

Methodology

Electrophoresis

Alternative name(s)

LD Isoenzymes without Total LD,LDI

Specimen requirements
Patient preparation	None Specified
Preferred specimen(s)	2 mL serum
Minimum volume	1 mL
Collection instructions	Total Lactate Dehydrogenase results should be supplied by Client. Centrifuge serum specimens within 1 hour of collection, transfer serum to a clean, plastic, screw-capped vial(s), and send at room temperature to the laboratory. Do not refrigerate or freeze specimens. Specimens cannot be shared, and no other tests should be ordered with Lactate Dehydrogenase Isoenzymes.
Transport container	Transport tube
Transport temperature	Room temperature
Specimen stability	Room temperature: 7 days Refrigerated: Unacceptable Frozen: Unacceptable
Reject criteria	Hemolysis • Received refrigerated • Received frozen

Reference range(s)

Reference Range(s)

LD1	18-32 %
LD2	29-42 %
LD3	14-30 %
LD4	6-13 %
LD5	5-18 %

LOINC® codes

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Service Area Information

Performing lab & setup schedule

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Service Area Information

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

*The CPT codes provided are based on AMA guidance 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.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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