Sign in →

Test Code LD_I Lactate Dehydrogenase (LD) Isoenzymes, Serum

Additional Codes

MLAB: YLD

Powerchart: Lactate Dehydrogenase (LDH) Isoenzymes

Epic: LAB97 Lactate Dehydrogenase Isoenzymes

MA Cerner: Lactate Dehydrogenase Isoenzymes.

Reporting Name

Lactate Dehydrogenase Isoenzymes, S

Useful For

Investigating a variety of diseases involving the heart, liver, muscle, kidney, lung, and blood

 

Differentiating heart-synthesized lactate dehydrogenase (LD) from liver and other sources

 

Aids in the diagnosis of myocardial infarction when used in combination with total creatine kinase (CK) and CK-MB

 

Investigating unexplained causes of LD elevations

 

Detection of macro-LD

Profile Information

Test ID Reporting Name Available Separately Always Performed
LD Lactate Dehydrogenase (LD), S Yes Yes
LDI LD Isoenzymes, S No Yes

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum


Necessary Information


Patient's age is required.



Specimen Required


Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 2 mL divided into 2 tubes each containing 1 mL


Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Ambient (preferred) 7 days
  Refrigerated  48 hours

Reference Values

LACTATE DEHYDROGENASE (LD)

1-30 days: 135-750 U/L

31 days-11 months: 180-435 U/L

1-3 years: 160-370 U/L

4-6 years: 145-345 U/L

7-9 years: 143-290 U/L

10-12 years: 120-293 U/L

13-15 years: 110-283 U/L

16-17 years: 105-233 U/L

≥18 years: 122-222 U/L

 

LD ISOENZYMES

I (fast band): 17.5-28.3%

II: 30.4-36.4%

III: 19.2-24.8%

IV: 9.6-15.6%

V (slow band): 5.5-12.7%

Day(s) and Time(s) Performed

LD: Monday through Sunday; Continuously

LD isoenzymes: Tuesday, Thursday, Saturday; 10 a.m.

Test Classification

This test has been cleared or approved by the U.S. 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

83615-LD

83625-LD isoenzymes

LOINC Code Information

Test ID Test Order Name Order LOINC Value
LD_I Lactate Dehydrogenase Isoenzymes, S In Process

 

Result ID Test Result Name Result LOINC Value
LD Lactate Dehydrogenase (LD), S 14804-9
305 LD Isoenzymes, S 49279-3
3344 Total LD Activity 14804-9
2282 I, Heart 2536-1
2283 II 2539-5
2285 III 2542-9
2286 IV 2545-2
2287 V, Liver 2548-6

Reject Due To

Hemolysis

Mild reject; Gross reject

Lipemia

Mild OK; Gross OK

Icterus

NA

Other

NA

Method Name

LDI: Electrophoresis Densitometry

LD: Photometric Rate

Forms

If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Test Request Form (T728) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/gastroenterology-and-hepatology-test-request.pdf)