LDL Chol. (Direct)

Primary unit: mg/dL
LOINC codes: 18262-6
Tests that measure LDL Chol. (Direct): Quest Diagnostics 2, Labcorp 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Labcorp, Low-density Lipoprotein Cholesterol (Direct) 120295

Age	Male	Female
0-19 y	0-109	0-109
>19 y	0-99	0-99

Labcorp test catalog, 120295

Quest Diagnostics, Direct LDL 8293

Population	Interval
<20 Years	<110 mg/dL
≥20 Years	<100 mg/dL

Quest Diagnostics test catalog, 8293

Quest Diagnostics, Cardio IQ® Direct LDL 91723

Population	Interval
<20 Years	<110 mg/dL
≥20 Years	<100 mg/dL

Quest Diagnostics test catalog, 91723

Tests

Check the catalog code, specimen, method and preparation for every test that measures LDL Chol. (Direct). Select up to five tests to compare them side by side.

Quest Diagnostics 2 tests

Single-analyte tests

Cardio IQ® Direct LDL 91723
Serum · Fasting not stated · Turnaround Set up: Sun-Thurs
Method and collection
Method
Enzymatic
Preparation
If a Direct LDL-cholesterol measurement is to be performed along with triglycerides, but not part of a lipid panel, then the patient should be fasting 9-12 hours prior to collection. If the Direct LDL cholesterol is ordered along with a lipid panel, then a fasting sample is not required.
Quest Diagnostics catalog page
Direct LDL 8293
Serum · Fasting not stated · Turnaround Set up: Mon-Fri; Report available: 5 days
Method and collection
Method
Enzymatic
Preparation
If a Direct LDL-cholesterol measurement is to be performed along with triglycerides, but not part of a lipid panel, then the patient should be fasting 9-12 hours prior to collection. If the Direct LDL cholesterol is ordered along with a lipid panel, then a fasting sample is not required.
Quest Diagnostics catalog page

Labcorp 1 test

Single-analyte tests

Low-density Lipoprotein Cholesterol (Direct) 120295
Serum · No fasting · Turnaround Within 1 day
Method and collection
Method
Enzymatic/spectrophotometric without sample pretreatment
Preparation
Patients are not required to fast prior to blood collection. Nonfasting and fasting samples can be used. Nonfasting results are slightly lower than fasting results.
Collection
Separate serum or plasma from cells within 45 minutes of collection.
Labcorp catalog page

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Sources

Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.

Lab catalogs

Labcorp test menu
Labcorp
- Test catalog: 1 tests, with codes, specimens, methods and reference intervals
Open source
Quest Diagnostics test menu
Quest Diagnostics
- Test catalog: 2 tests, with codes, specimens, methods and reference intervals
Open source

Codes and registries

LOINC 18262-6
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for LDL Chol. (Direct)
Registered studies that measure LDL Chol. (Direct), on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

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