Lactate Dehydrogenase (LD) : 593

Test Code
LDHAU or 593

Alias/See Also
LD, LDH (Lactic Dehydrogenase), Lactic Acid Dehydrogenase

CPT Codes

Transport Container
Preferred Specimen
1 mL serum

Alternative Specimens
Sodium heparin (green-top) tube or Lithium heparin (green-top) tube

Minimum Volume
0.5 mL

Transport Temperature
Room temperature.

Specimen Stability
Room temperature: 14 days; Refrigerated: 48 hours; Frozen: Unacceptable
Room temperature: 14 days; Refrigerated: Unacceptable; Frozen: Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Received frozen, Anticoagulants other than heparin


Setup Schedule
Sunday - Saturday

Report Available
1 day

Reference Range
                     Male (U/L) Female (U/L)

<1 Month    125-735                  145-765

1-11 Months 170-450                  190-420

1-3 Years 155-345                  165-395

4-6 Years 155-345                  135-345

7-10 Years 140-270                  140-270

11-13 Years 110-250                  110-250

14-17 Years 110-230                   110-230

18-49 Years 100-220                   100-200

>49 Years 120-250                   120-250

Clinical Significance
Elevations in serum lactate dehydrogenase occur from myocardial infarction, liver disease, pernicious and megaloblastic anemia, pulmonary emboli, malignancies, and muscular dystrophy. Since lactic dehydrogenase is present in many body tissues, it's diagnosis usefulness is limited. Tissue specificity may be enhanced by isoenzyme analysis.

Performing Laboratory
med fusion

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.