Summary & Overview
CPT 81200: ASPA Gene Variant Detection, Technical Laboratory Test
CPT code 81200 represents the technical laboratory test used to detect common changes in the ASPA (aspartoacylase) gene. This genetic molecular diagnostic procedure is clinically relevant for identifying ASPA variants that can inform diagnosis and management of metabolic and neurologic disorders. Nationally, genetic testing codes like CPT 81200 are important for laboratory billing, benefit design, and precision medicine implementation.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise overview of coverage patterns, reimbursement benchmarks, and clinical context relevant to laboratories and clinicians submitting claims for this test.
Readers will learn the clinical purpose of the code, typical sites of service where the test is performed, common payer coverage considerations, and the types of benchmarks and policy updates that affect molecular diagnostic billing at a national level. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 81200 describes a laboratory procedure in which the technical component of genetic testing is performed to detect common variants in the ASPA (aspartoacylase) gene. The service involves laboratory analysis of a patient specimen to determine the presence of known changes in the ASPA gene that are associated with metabolic and neurologic conditions.
Service Type: Genetic molecular diagnostic testing (technical component)
Typical Site of Service: Clinical diagnostic laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A typical patient is an infant or young child referred by a pediatric neurologist or geneticist for molecular testing of the aspartoacylase gene (ASPA) due to developmental delay, hypotonia, seizure activity, loss of acquired skills, or an early-onset leukodystrophy pattern on MRI. The clinical workflow begins with the ordering clinician documenting the indication and family history, obtaining informed consent for genetic testing, and collecting a blood sample (or buccal swab) sent to a molecular diagnostics laboratory.
In the laboratory, a molecular technologist performs the technical assay to detect common pathogenic variants in ASPA (sequence-specific mutation analysis or targeted genotyping). The lab verifies sample identity, extracts DNA, runs the targeted test, analyzes raw data, and produces a technical report. A board-certified molecular geneticist or laboratory director reviews and signs the interpretive report (professional component). Results are communicated back to the ordering provider, who integrates findings into clinical care, which may include genetic counseling, family testing, or management changes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the interpretive/professional component of the genetic test report provided by a physician or laboratory director. |