Summary & Overview

CPT 0218U: Genomic Unity DMD Analysis

CPT code 0218U designates the Genomic Unity® DMD Analysis from Variantyx Inc., a Proprietary Laboratory Analyses (PLA) test that performs full sequencing plus duplication/deletion analysis of the DMD gene, linked to Duchenne and Becker muscular dystrophies. As a PLA code, 0218U applies to a single manufacturer’s test and is used to identify a specific high-complexity molecular diagnostic service. Nationally, genetic testing for dystrophinopathies is clinically important for diagnosis, carrier detection, and therapeutic decision-making as gene-targeted therapies and clinical trials expand.

Key payers included in the coverage landscape are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of coverage considerations and payer presence, typical sites of service and service type, and the clinical context for when this test is ordered. The publication summarizes benchmarks and policy-relevant updates where available and highlights common billing modifiers and administrative notes used alongside PLA molecular diagnostics. Data not available in the input are identified where applicable.

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Billing Code Overview

CPT code 0218U is a Proprietary Laboratory Analyses (PLA) code for the Genomic Unity® DMD Analysis from Variantyx Inc. The code covers a laboratory diagnostic test that performs full gene sequencing and duplication/deletion analysis of the DMD gene, which is associated with Duchenne and Becker muscular dystrophies. This proprietary test is specific to a single manufacturer or laboratory and is reported using the PLA CPT code 0218U.

Service type: Clinical molecular diagnostic laboratory test (genetic testing for DMD)

Typical site of service: Independent or hospital-based clinical laboratory; outpatient specimen collection sites

Clinical & Coding Specifications

Clinical Context

A young male patient with progressive muscle weakness, delayed motor milestones, and elevated creatine kinase (CK) levels is evaluated in a neuromuscular clinic. The neurologist orders a comprehensive molecular diagnostic test to confirm or exclude Duchenne or Becker muscular dystrophy. Blood is collected in an EDTA tube and sent to the reference laboratory performing the Genomic Unity® DMD Analysis (0218U). The laboratory performs full gene sequencing and deletion/duplication (copy number) analysis of the DMD gene. Results are interpreted by a molecular pathologist and a clinical report is returned to the ordering neurologist and the patient’s genetic counselor. Typical workflow steps: pre-test counseling and consent, blood draw at an outpatient phlebotomy or clinic, sample shipping to the performing laboratory, laboratory extraction and sequencing, bioinformatic analysis for sequence variants and copy-number changes, clinical interpretation, and reporting. Typical sites of service include outpatient neurology clinics, pediatric specialty clinics, hospital outpatient phlebotomy services, and independent reference laboratories. The typical patient scenario includes males with suspected Duchenne muscular dystrophy, Becker muscular dystrophy, or female carriers identified via family history or abnormal newborn/early childhood screening results.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component

Taxonomy Code	Specialty	Notes
`207RC0000X`	Neurology	Ordering clinicians commonly include pediatric and adult neurologists evaluating muscle disease.
`2080P0207X`	Clinical Molecular Genetics	Laboratories and directors with this taxonomy perform molecular testing and interpretation.
`2085R0201X`	Clinical Laboratory	Performing laboratories and technical directors responsible for sequencing and assay operations.
`208D00000X`	Pathology	Molecular pathologists provide medical interpretation of genetic test results.
`208000000X`	Pediatrics	Pediatric specialists often order DMD testing for infants and children with developmental or muscle-weakness concerns.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G71.0`	Muscular dystrophy	Primary diagnostic category encompassing Duchenne and Becker muscular dystrophies; indicates clinical suspicion prompting DMD genetic testing.
`G71.01`	Duchenne muscular dystrophy	Directly indicates suspected Duchenne disease; primary indication for `0218U` testing.
`G71.02`	Becker muscular dystrophy	Indicates suspected Becker disease; test differentiates variant types and carrier status.
`R53.2`	Functional quadriplegia	May be used in advanced severe weakness; supports clinical context for molecular testing when progressive weakness present.
`R29.898`	Other symptoms and signs involving the nervous and musculoskeletal systems	Used for nonspecific symptoms like gait abnormalities prompting evaluation including genetic testing.
`Z13.79`	Encounter for other screening for genetic and chromosomal anomalies	Used for family-history or carrier screening encounters where DMD testing is ordered.
`Z14.2`	Genetic carrier (carrier of)	Used when documenting carrier status in females tested for DMD carrierism.
`R25.2`	Cramp and spasm	Symptom code that may accompany neuromuscular presentations leading to diagnostic testing.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`0218U`	Genomic Unity® DMD Analysis — full gene sequencing and deletion/duplication analysis of DMD	Proprietary PLA code for the specific DMD molecular assay performed by Variantyx Inc.; primary test described.
`81162`	Sequencing test for dystrophin (DMD) gene; full gene analysis — interpretation and report	Commonly used for non-proprietary comprehensive DMD sequencing and may be billed when equivalent non-PLA assays are performed.
`81479`	Unlisted molecular pathology procedure	Used for molecular tests without a specific CPT descriptor when no PLA code applies or for additional custom analyses not covered by `0218U`.
`83020`	Hemoglobin; electrophoresis (hemoglobin electrophoresis)	Example of a laboratory test sometimes ordered in the broader workup of pediatric patients; not specific to DMD but often present in panel testing workflows.
`81002`	Urinalysis, non-automated, without microscopy	Routine outpatient specimen tests performed during evaluation visits; ancillary to genetic testing workflow.