Skip Ribbon Commands
Skip to main content
Sign In
Navigate Up

22817 LDL Cholesterol, Direct

LDL Cholesterol, Direct
Test Code: LDL-D
Synonyms/Keywords
Lipoprotein, LDL - Direct, Cholesterol, LDL - Direct, Direct LDL​
Useful For
Low-density lipoproteins (LDL) play a key role in causing and influencing the progression of atherosclerosis and coronary sclerosis in particular.​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)

​Yes

9-12 hours

 Plasma/Serum​ Lithium-heparin Plasma Separator (PST), ​Serum Separator Tube(SST)​ Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT)
 1 mL​ 0.3 mL​ ​
Collection Processing Instructions
It is recommended that the patient be FASTING 9-12 hours before the specimen is drawn.​
Specimen Stability Information
Specimen Type Temperature Time
Plasma/Serum​ ​ Refrigerate​ 7 days​
Frozen 30 days​
Interference
 ​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Liquid Selective Detergent Endpoint Assay/ Beckman AU
Test Information
The calculated LDL Cholesterol is the routine LDL test. This direct serum test should only be ordered as a secondary test following abnormal lipoprotein panel results where LDL calculation cannot be used.​
Reference Range Information
Performing Location Reference Range
Marshfield​ <=19 yrs:   60-110 mg/dL 
>=20 yrs:   80-130 mg/dL ​
Interpretation
Desirable LDL-CHOL is < or = to 100 if Coronary Heart Disease (CHD), Peripheral Vascular Disease, or Diabetes is present.
Desirable LDL-CHOL is < 130 where no CHD is present and there are 2 or more risk factors.
Desirable LDL-CHOL is < 160 where no CHD is present and there are 1 or less risk factors.
Risk factors include: Age (Males > 45; Females > 55); Smoker; High Blood Pressure; Family History of Premature CHD; HDL < 40 (If HDL > 60, subtract one risk factor).​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
83721 ​ ​ ​ ​ ​
Synonyms/Keywords
Lipoprotein, LDL - Direct, Cholesterol, LDL - Direct, Direct LDL​
Ordering Applications
Ordering Application Description
​Centricity

​a. Lipoprotein LDL-Dir.

b. Cholesterol, LDL

​Cerner ​Cholesterol Low Density Lipid-Direct
​COM ​Lipo, LDL-Direct
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)

​Yes

9-12 hours

 Plasma/Serum​ Lithium-heparin Plasma Separator (PST), ​Serum Separator Tube(SST)​ Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT)
 1 mL​ 0.3 mL​ ​
Collection Processing
It is recommended that the patient be FASTING 9-12 hours before the specimen is drawn.​
Specimen Stability Information
Specimen Type Temperature Time
Plasma/Serum​ ​ Refrigerate​ 7 days​
Frozen 30 days​
Interference
 ​
Useful For
Low-density lipoproteins (LDL) play a key role in causing and influencing the progression of atherosclerosis and coronary sclerosis in particular.​
Reference Range Information
Performing Location Reference Range
Marshfield​ <=19 yrs:   60-110 mg/dL 
>=20 yrs:   80-130 mg/dL ​
Interpretation
Desirable LDL-CHOL is < or = to 100 if Coronary Heart Disease (CHD), Peripheral Vascular Disease, or Diabetes is present.
Desirable LDL-CHOL is < 130 where no CHD is present and there are 2 or more risk factors.
Desirable LDL-CHOL is < 160 where no CHD is present and there are 1 or less risk factors.
Risk factors include: Age (Males > 45; Females > 55); Smoker; High Blood Pressure; Family History of Premature CHD; HDL < 40 (If HDL > 60, subtract one risk factor).​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ Less than 2 hours​ Liquid Selective Detergent Endpoint Assay/ Beckman AU
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
83721 ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.