CPT 81302 MECP2 Sequencing Reimbursement | OpenPayer

Summary & Overview

CPT 81302: MECP2 Full Gene Sequencing

CPT code 81302 represents full-gene sequencing of the methyl CpG binding protein 2 (MECP2) gene performed in a clinical laboratory. This molecular diagnostic procedure identifies sequence variants across the entire coding region of MECP2 and is clinically relevant for diagnosing or evaluating genetic causes of neurodevelopmental disorders. Nationally, precise sequencing tests like this inform patient diagnosis, family counseling, and care planning, and they are subject to payer-specific coverage policies and reimbursement frameworks.

Key payers addressed in this publication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for MECP2 sequencing, typical sites of service, and the role of the test in diagnostic workflows. The publication outlines common modifiers and coding considerations provided in the input, and summarizes what to expect from payer coverage approaches and billing practice benchmarks when available.

This resource is intended to help billing staff, laboratory managers, and policy analysts understand the clinical purpose of CPT code 81302, the service environment where it is performed, and the categories of information payers evaluate for coverage and payment. Data not available in the input is noted explicitly where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 81302molecular geneticsMECP2 sequencinggenetic testingclinical laboratoryfull gene sequencingdiagnostic geneticsmedical billinglaboratory services

Billing Code Overview

CPT code 81302 describes the laboratory analysis that sequences the entire coding region of the methyl CpG binding protein 2 (MECP2) gene. This service is a molecular genetics test performed by a laboratory analyst to evaluate the full gene sequence for variants in MECP2, which is implicated in neurodevelopmental disorders.

Service Type: Clinical molecular genetics — full gene sequencing

Typical Site of Service: Clinical diagnostic laboratory

Clinical & Coding Specifications

Clinical Context

A pediatric or neurogenetics clinic orders 81302 for sequencing the entire coding region of the MECP2 gene when a patient presents with global developmental delay, regression of acquired skills, intellectual disability, characteristic hand stereotypies, breathing irregularities, or microcephaly suspicious for Rett syndrome or other MECP2-related disorders. Typical workflow: a neurology or genetics provider documents clinical features and orders molecular testing; the specimen (usually blood or saliva) is collected in the clinic or outpatient lab and sent to a reference molecular diagnostics laboratory. The laboratory accessioning team verifies patient and order information; DNA is extracted, library preparation and full-gene sequencing are performed by the lab analyst using next-generation sequencing or Sanger-based methods as appropriate; bioinformatics and variant interpretation follow, and a board-certified molecular geneticist or laboratory director reviews and signs the final report. Results are routed back to the ordering provider for genetic counseling and management decisions. Typical site of service is an outpatient hospital laboratory or independent reference laboratory contracted by the clinic. The patient scenario frequently involves pediatric female patients but can include males with neurodevelopmental phenotypes, and testing may be ordered as reflex or confirmatory testing following abnormal screening or when clinical suspicion for MECP2 pathogenic variants exists.

Coding Specifications

Modifier	Description	When to Use
`26`

CPT 81177: ATN1 Gene Expansion Detection, Molecular Diagnostic Test

CPT-81259-ALPHA-GLOBIN-GENE-SEQUENCING-HBA1-HBA2

CPT 81259: Full-Gene Sequencing of HBA1/HBA2 for Alpha Thalassemia

CPT-81331-METHYLATION-ANALYSIS-SNPRN-UBE3A

CPT 81331: Methylation Analysis of SNRPN and UBE3A

CPT-81244-FMR1-GENE-CHARACTERIZATION-MOLECULAR-TESTING

CPT 81244: FMR1 Gene Characterization, Molecular Testing

CPT-81260-IKBKAPP-GENETIC-TESTING-IKBKAPP-GENE-VARIANTS

CPT 81260: Technical Molecular Test for IKBKAP Gene Variants

CPT-81289-TARGETED-FXN-FRAXIN-FAMILIAL-GENETIC-TEST

CPT 81289: Targeted Familial Frataxin (FXN) Genetic Test

CPT-81247-G6PD-GENE-VARIANT-ANALYSIS

CPT 81247: G6PD Gene Variant Analysis

CPT-81238-FACTOR-IX-F9-GENE-FULL-SEQUENCE

CPT 81238: Full-Gene Sequencing of Coagulation Factor IX (F9)

CPT-81166-BRCA1-LARGE-GENE-REARRANGEMENT-ANALYSIS

CPT 81166: BRCA1 Large Gene Rearrangement Analysis, Technical Component

CPT-81216-BRCA2-FULL-GENE-SEQUENCING

CPT 81216: BRCA2 Full-Gene Sequencing

Showing 1–10 of 199

Taxonomy Code	Specialty	Notes
207Q00000X	Clinical Molecular Genetics	Providers who order and interpret hereditary molecular testing.
2080P0207X	Pediatrics	Pediatricians who evaluate developmental delay and order genetic testing.
2084P0800X	Neurology	Pediatric neurologists or neurologists managing neurodevelopmental disorders.
364SP0800X	Clinical Laboratory	Laboratory directors and technical staff who perform molecular diagnostic testing.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F84.0`	Autistic disorder	Autism spectrum features can overlap with or prompt evaluation for MECP2 mutations, particularly with regression.
`F80.9`	Developmental disorder of speech and language, unspecified	Developmental delays in communication may trigger genetic testing including MECP2 sequencing.
`F81.9`	Developmental disorder of scholastic skills, unspecified	Global developmental concerns prompt genetic evaluation including MECP2 testing.
`R62.0`	Delayed milestone in childhood	Common presenting problem that leads to ordering `81302` to assess for Rett syndrome or MECP2-related disorders.
`G40.909`	Epilepsy, unspecified, not intractable, without status epilepticus	Seizures accompany many MECP2-related conditions and justify genetic testing.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`81302`	Analysis of MECP2 gene, full gene sequence (technical component)	Primary procedure for full gene sequencing and variant detection in MECP2.
`81225`	Methyl-CpG binding protein 2 (MECP2) mutation analysis, common pathogenic variants (targeted analysis)	May be performed as a targeted initial test for common recurrent MECP2 mutations prior to or instead of full-gene sequencing in certain clinical protocols.
`81162`	Interpretation and report of sequencing data (molecular pathology CPT for somatic/germline)	Represents professional interpretation and reporting services commonly billed alongside technical sequencing work when separate billing occurs.
`81479`	Unlisted molecular pathology procedure	Used when a novel or atypical sequencing method or extended analysis outside standard MECP2 testing is performed.
`88235`	Collection of peripheral blood for DNA testing (if applicable)	Represents specimen collection services that often precede molecular testing, billed by the clinic or phlebotomy service.

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