CPT® Code 83897

Code deleted, see 81200-81479

Official Description

Molecular diagnostics; nucleic acid transfer (eg, Southern, Northern), each nucleic acid preparation

Common Language Description

Molecular diagnostics encompass a range of laboratory techniques used to analyze biological markers in the genome and proteome. These tests are pivotal in identifying genetic mutations that may indicate the presence of certain diseases, even in asymptomatic individuals. They serve multiple purposes, including the monitoring and diagnosis of existing disease states, as well as screening for genetic carriers and individuals who may be predisposed to specific conditions, thereby facilitating preventive medicine. The procedures involved in molecular diagnostics often include techniques such as Southern and Northern blotting, which are essential for the transfer and analysis of nucleic acids. In these methods, a single strand of labeled DNA or RNA is hybridized with a test sample to detect complementary strands within the target nucleic acid. The target sample, which is a complex mixture of nucleic acid fragments, is first separated by size using electrophoresis before being transferred to a membrane, such as nylon or nitrocellulose, where it is fixed for analysis. Southern blotting specifically focuses on the separation and analysis of digested genomic DNA, allowing for the identification of specific genes through hybridization with labeled probes. Conversely, Northern blotting is utilized to characterize specific messenger RNA (mRNA) transcripts, enabling quantification, size determination, and detection of splice variants. The CPT® Code 83897 is designated for reporting each nucleic acid preparation involved in these diagnostic processes.

1. Indications

The molecular diagnostics procedure, as described by CPT® Code 83897, is indicated for various clinical scenarios, including:

Genetic Mutation Detection Molecular diagnostic tests are performed to identify genetic mutations that may indicate the presence of certain diseases, even in patients who do not exhibit symptoms.
Monitoring Disease States These tests can be utilized to monitor ongoing disease conditions, providing critical information for treatment decisions.
Screening for Genetic Carriers The procedure is also indicated for screening individuals who may be carriers of genetic diseases, which is essential for family planning and risk assessment.
Identifying Individuals at Risk Molecular diagnostics can help identify individuals predisposed to certain conditions, allowing for timely preventive measures and interventions.

2. Procedure

The procedure for molecular diagnostics involving nucleic acid transfer includes several key steps, as outlined below:

Step 1: Sample Preparation The first step involves the preparation of the nucleic acid sample, which may include genomic DNA or total RNA. The sample is typically extracted from biological specimens such as blood, tissue, or other bodily fluids.
Step 2: Electrophoresis Once the nucleic acid is prepared, it undergoes electrophoresis, a technique that separates the nucleic acid fragments based on size. This process involves applying an electric field to the gel containing the nucleic acids, allowing smaller fragments to migrate faster than larger ones.
Step 3: Transfer to Membrane After electrophoresis, the separated nucleic acid fragments are transferred to a membrane, such as nylon or nitrocellulose. This transfer is crucial for subsequent hybridization and detection steps.
Step 4: Hybridization The next step involves hybridizing the transferred nucleic acids with labeled complementary DNA or RNA probes. These probes are designed to bind specifically to the target sequences of interest, allowing for the identification of specific genes or mRNA transcripts.
Step 5: Detection Finally, the hybridized probes are detected using various methods, which may include autoradiography or fluorescence. This detection step allows for the visualization and quantification of the target nucleic acids, providing valuable diagnostic information.

3. Post-Procedure

Post-procedure care for molecular diagnostics typically involves the analysis of the results obtained from the hybridization and detection steps. Clinicians will interpret the findings to determine the presence of specific genetic mutations or the expression levels of mRNA transcripts. Depending on the results, further clinical actions may be warranted, such as additional testing, counseling for genetic conditions, or the implementation of preventive measures. It is essential for healthcare providers to communicate the results effectively to patients and discuss any implications for treatment or family planning. Additionally, proper documentation of the procedure and results is crucial for compliance and billing purposes.

Short Descr	MOLECULE NUCLEIC TRANSFER
Medium Descr	MOLEC NUCLEIC ACID TR EA NUCLEIC ACID PREPJ
Long Descr	Molecular diagnostics; nucleic acid transfer (eg, Southern, Northern), each nucleic acid preparation
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
APC Status Indicator	Discontinued Code
Type of Service (TOS)	5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS)	none
MUE	Not applicable/unspecified.
CCS Clinical Classification	233 - Laboratory - Chemistry and Hematology