Lactate Dehydrogenase (LD) Isoenzyme Panel
Quest Diagnostics
Sample type: Serum
Requires fasting: No
Phlebotomy required
Details
Lactate Dehydrogenase (LD) Isoenzyme Panel - 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, LD-II, 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.
- Lactate dehydrogenase (ld)
- LD1
- LD2
- LD3
- LD4
- LD5
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
2–5 business days
Age Group 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
Lactate Dehydrogenase Isoenzymes
LD1 18–32 %
LD2 29–42 %
LD3 14–30 %
LD4 6–13 %
LD5 5–18 %
Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics blood draw guide
Getlabs Mobile Phlebotomy
- Location: Sample collection at your home or office.
- Cost: $85 sample collection fee (paid during lab order checkout).
- Availability: Available in most locations – enter your ZIP code during checkout to confirm.
- Scheduling: Schedule your appointment here through your Fullscript account.
- Collection Instructions:
- Have your digital or printed requisition form and valid ID ready.
- Your phlebotomist will contact you by phone to coordinate arrival.
- More Info: Getlabs blood draw guide
- Preferred Specimen(s): 2 mL serum collected in a serum separator tube (SST)
- Alternative: NA
- Minimum Volume: 1 mL
- Collection Instructions: NA
- Transport Container: Transport tube
- Transport Temperature: Room Temperature
- Specimen Stability:
- Room temperature: 7 days
- Reject Criteria:
- Hemolysis • Received refrigerated • Received frozen
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
