CPT® Code 83722

Official Description

Lipoprotein, direct measurement; small dense LDL cholesterol

Common Language Description

The CPT® Code 83722 refers to a specific laboratory test that measures small dense low-density lipoprotein (sdLDL) cholesterol levels in the blood. Lipoproteins are complex biochemical structures composed of lipid molecules, which are fats, bound to proteins. These structures play a crucial role in transporting lipids throughout the body via the bloodstream. Lipoproteins can vary significantly in size and density; they range from large, less dense particles, which have a higher fat content relative to protein, to smaller, denser particles, where protein predominates. These lipoproteins can originate from dietary sources, known as exogenous lipoproteins, or can be produced internally by the liver, referred to as endogenous lipoproteins. Among the various subclasses of low-density lipoproteins (LDL), small dense LDL is particularly noteworthy due to its association with an increased risk of atherosclerosis, a condition characterized by the buildup of fatty deposits in the arteries. This subclass is considered a strong contributor to inflammatory processes linked to cardiovascular disease (CVD) and serves as a more reliable marker for predicting the risk of CVD compared to other LDL subclasses. In contrast, high-density lipoproteins (HDL) are beneficial as they assist in the removal of cholesterol from the bloodstream, thereby reducing the risk of atherosclerosis and CVD. The direct measurement of lipoproteins, such as small dense LDL cholesterol, is performed using specific laboratory tests rather than relying on calculated values derived from total cholesterol, HDL, and triglyceride levels. This direct measurement provides a more accurate assessment of lipoprotein levels. To obtain the necessary blood sample for this test, a venipuncture is performed, which is a separate and reportable procedure. The test for small dense LDL cholesterol (CPT® Code 83722) is distinct from other related tests, such as those for HDL (CPT® Code 83718), very low-density lipoproteins (CPT® Code 83719), and standard LDL cholesterol (CPT® Code 83721), each of which employs different methodologies for analysis.

1. Indications

The procedure associated with CPT® Code 83722 is indicated for the assessment of small dense low-density lipoprotein (sdLDL) cholesterol levels in patients who may be at risk for cardiovascular disease (CVD). The following conditions and situations may warrant this specific test:

Risk Assessment for Cardiovascular Disease: Patients with a family history of heart disease or those exhibiting risk factors such as obesity, hypertension, or diabetes may require this test to evaluate their cardiovascular risk profile.
Monitoring Lipid Disorders: Individuals diagnosed with dyslipidemia or other lipid metabolism disorders may undergo this test to monitor changes in sdLDL levels and adjust treatment plans accordingly.
Evaluation of Atherosclerosis: Patients suspected of having atherosclerosis may be tested to determine the presence of small dense LDL, which is associated with a higher risk of plaque formation in arteries.
Assessment of Treatment Efficacy: Patients undergoing lipid-lowering therapies may be tested to assess the effectiveness of their treatment in reducing sdLDL cholesterol levels.

2. Procedure

The procedure for obtaining a measurement of small dense LDL cholesterol (CPT® Code 83722) involves several key steps, which are outlined below:

Step 1: Patient Preparation Before the test, the patient may be instructed to fast for a specific period, typically 9 to 12 hours, to ensure accurate measurement of lipid levels. This fasting period helps to minimize the influence of recent food intake on lipid profiles.
Step 2: Venipuncture A qualified healthcare professional performs a venipuncture, which involves inserting a needle into a vein, usually in the arm, to draw a blood sample. This procedure is done using sterile techniques to prevent infection and ensure the safety of the patient.
Step 3: Sample Collection The blood sample is collected into a specific type of tube that may contain additives to preserve the integrity of the sample for laboratory analysis. Proper labeling and handling of the sample are crucial to avoid contamination and ensure accurate results.
Step 4: Laboratory Analysis The collected blood sample is sent to a laboratory where it undergoes analysis using specific methodologies designed to measure small dense LDL cholesterol levels directly. This may involve enzymatic techniques that provide precise quantification of sdLDL.
Step 5: Result Interpretation Once the analysis is complete, the laboratory generates a report detailing the sdLDL cholesterol levels. Healthcare providers will interpret these results in the context of the patient's overall health and risk factors for cardiovascular disease.

3. Post-Procedure

After the procedure, patients may be advised to resume their normal activities unless otherwise directed by their healthcare provider. There are typically no specific post-procedure care requirements following a venipuncture, although patients may be instructed to apply pressure to the site of the blood draw to minimize bruising. Results from the small dense LDL cholesterol test will be reviewed by the healthcare provider, who will discuss the implications of the findings and any necessary follow-up actions, such as lifestyle modifications or adjustments to medication regimens, based on the sdLDL levels and the patient's overall cardiovascular risk profile.

Short Descr	LIPOPRTN DIR MEAS SD LDL CHL
Medium Descr	DIR MEAS LIPOPROTEIN SMALL DENSE LDL CHOLESTEROL
Long Descr	Lipoprotein, direct measurement; small dense LDL cholesterol
Status Code	Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days	XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC)	9 - Not Applicable
Multiple Procedures (51)	9 - Concept does not apply.
Bilateral Surgery (50)	9 - Concept does not apply.
Physician Supervisions	09 - Concept does not apply.
Assistant Surgeon (80, 82)	9 - Concept does not apply.
Co-Surgeons (62)	9 - Concept does not apply.
Team Surgery (66)	9 - Concept does not apply.
Diagnostic Imaging Family	99 - Concept Does Not Apply
CLIA Waived (QW)	No
APC Status Indicator	Conditionally packaged laboratory tests
Type of Service (TOS)	5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS)	none
MUE	1

90	Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number.
59	Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
GW	Service not related to the hospice patient's terminal condition