Summary & Overview
CPT 81466: Genome Sequence Analysis for Heritable Disorders
CPT code 81466 represents genome sequence analysis, a critical tool in the diagnosis and management of unexplained constitutional or heritable disorders. This code is increasingly important as genetic testing becomes a cornerstone of precision medicine, enabling clinicians to identify chromosomal abnormalities and congenital syndromes that may not be detectable through traditional methods. The procedure is typically performed in laboratory settings and is relevant for patients presenting with conditions such as chromosomal abnormalities, congenital malformation syndromes, and Down syndrome.
Blue Cross Blue Shield is a key payer covering this service, reflecting broader national trends in payer coverage for advanced genetic testing. Readers will gain insight into the clinical context of genome sequencing, relevant ICD-10 diagnoses, and related CPT codes that may be used in conjunction with or as alternatives to 81466. The publication also addresses common billing modifiers and associated medical genetics taxonomies, providing a comprehensive overview of coding, coverage, and policy considerations for genome sequence analysis. This summary is designed to inform healthcare professionals, laboratory administrators, and policy stakeholders about the evolving landscape of genetic testing reimbursement and clinical application.
CPT Code Overview
CPT code 81466 is used to report genome sequence analysis for patients with unexplained constitutional or heritable disorders or syndromes. This procedure falls under the genetic testing service type and is typically performed in a laboratory setting (Place of Service 81). Genome sequencing provides comprehensive information about a patient's genetic makeup, supporting clinical decision-making for complex or rare conditions.
Clinical & Coding Specifications
Clinical Context
A patient presents with unexplained constitutional or heritable disorders, such as developmental delays, congenital malformations, or suspected chromosomal abnormalities. The clinical workflow involves a referral to a medical genetics specialist, who determines that comprehensive genome sequencing is necessary to identify potential genetic causes. The procedure is performed in a laboratory setting (Place of Service 81), where the patient's DNA is sequenced and analyzed for variants that may explain the clinical presentation. Results are interpreted by a qualified genetics professional and reported back to the referring provider for further management.
Coding Specifications
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Modifiers:
- Modifier
26: Used when reporting only the professional component (interpretation of results) of the procedure. - Modifier
TC: Used when reporting only the technical component (performance of sequencing and analysis) of the procedure. - Modifier
59: Used to indicate a distinct procedural service when multiple procedures are performed and need to be reported separately.
- Modifier
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Provider Taxonomies:
| Taxonomy Code | Specialty Name |
|---|---|
207SG0201X | Medical Genetics, Ph.D. Medical Genetics |
207SG0202X | Medical Genetics, Clinical Genetics (M.D.) |
207SG0203X | Medical Genetics, Clinical Biochemical Genetics |
207SG0205X | Medical Genetics, Clinical Molecular Genetics |
These taxonomies represent providers specializing in medical genetics, including both Ph.D. and M.D. professionals with expertise in clinical, biochemical, and molecular genetics.
Related Diagnoses
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Q99.9: Chromosomal abnormality, unspecified- Relevant for patients with suspected chromosomal abnormalities where the specific defect is not yet identified. Genome sequencing can help clarify the diagnosis.
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Q87.1: Congenital malformation syndromes predominantly associated with short stature- Used for patients presenting with syndromes involving congenital malformations and short stature. Genome sequencing may identify underlying genetic causes.
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Q90.9: Down syndrome, unspecified- Applied when Down syndrome is suspected or confirmed but not specified. Genome sequencing can provide detailed genetic information.
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Q93.9: Chromosomal deletion, unspecified- Used for cases where a chromosomal deletion is suspected but not fully characterized. Genome sequencing can detect and define such deletions.
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Q89.9: Congenital malformation, unspecified- Relevant for patients with congenital malformations of unknown etiology. Genome sequencing may assist in identifying genetic factors.
Related CPT Codes
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81479: Unlisted molecular pathology procedure- Used for molecular pathology procedures that do not have a specific CPT code. May be used when genome sequencing does not fit established codes.
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81228: Cytogenomic constitutional (genome-wide) microarray analysis- Used for genome-wide microarray analysis to detect chromosomal abnormalities. Can be performed as an alternative or complement to genome sequencing.
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81229: Cytogenomic constitutional (genome-wide) microarray analysis; each additional microarray- Used when additional microarray analyses are required beyond the initial procedure. Often reported with
81228.
- Used when additional microarray analyses are required beyond the initial procedure. Often reported with
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81470: Exome (e.g., unexplained constitutional or heritable disorder or syndrome); sequence analysis- Used for exome sequencing, which targets the protein-coding regions of the genome. May be used as an alternative to genome sequencing (
81466) when a more focused analysis is clinically appropriate.
- Used for exome sequencing, which targets the protein-coding regions of the genome. May be used as an alternative to genome sequencing (
These codes are related to 81466 in that they represent alternative or complementary genetic testing procedures. 81228 and 81229 are commonly used together for microarray analysis, while 81470 is an alternative to full genome sequencing.