Summary & Overview

CPT 82726: Very Long Chain Fatty Acid Analysis, Technical Component

CPT code 82726 identifies the technical laboratory assay that measures very long chain fatty acids (VLCFAs) in blood. This specialty biochemical test supports diagnosis and monitoring of peroxisomal and other metabolic disorders; because of its diagnostic specificity and low utilization frequency relative to routine labs, it is typically performed in reference or hospital-associated clinical laboratories. Nationally, use of 82726 matters for laboratory benefit design, prior authorization policies, and coverage of rare-disease testing.

Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a clinical context for the test, typical sites of service, and which payer populations are relevant for coverage discussions. The publication also provides benchmarks for utilization and payment (where available), summarizes common billing and claim considerations, and outlines policy developments that affect access to specialized metabolic testing.

The goal is to equip billing managers, laboratory directors, and policy analysts with a concise reference to CPT code 82726, clarifying its clinical purpose, payer relevance, and the operational setting in which the service is delivered. Data not available in the input will be noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare82726CPTlaboratoryvery long chain fatty acidsmetabolic testingperoxisomal disordersreference laboratorydiagnostic assay

Billing Code Overview

CPT code 82726 describes a laboratory test in which the technical component analyzes the amount of very long chain fatty acids (VLCFAs), typically performed on a blood specimen. This test is used to quantify specific long-chain fatty acids to support evaluation of metabolic and peroxisomal disorders.

Service type: Clinical laboratory testing (technical component)
Typical site of service: Clinical laboratory or reference diagnostic laboratory (blood specimen collection occurs in an ambulatory clinic or hospital outpatient setting)

Clinical & Coding Specifications

Clinical Context

A pediatric or adult patient with suspected peroxisomal disorder (for example, X-linked adrenoleukodystrophy or Zellweger spectrum disorder) presents to a metabolic clinic or neurology clinic for evaluation. The clinician documents progressive neurologic symptoms, adrenal dysfunction, developmental delay, or a family history of peroxisomal disease and orders biochemical testing. A phlebotomy is performed in an outpatient laboratory, hospital outpatient department, or reference lab collection center to obtain a blood specimen. The specimen is sent to a clinical chemistry or specialized metabolic laboratory where the lab analyst performs the technical analysis to measure very long chain fatty acids (VLCFA) levels using gas chromatography–mass spectrometry or similar validated assays. Results are reported to the ordering physician and used alongside clinical exam, neuroimaging, and genetic testing to confirm a peroxisomal biogenesis disorder or to evaluate adrenal insufficiency and neurodegeneration. Typical sites of service include outpatient hospital laboratory, independent clinical diagnostic laboratory, and specialty metabolic clinic; the service type is diagnostic laboratory testing.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When reporting only the professional interpretation component for a split technical/professional lab service (if applicable to a separate billing arrangement).
`TC`	Technical component	When billing only the technical component of the laboratory test performed by the facility or lab.
`90`	Reference (outside) laboratory	When the performing laboratory bills the payer directly but the specimen was collected by another provider; or when indicating testing performed by an outside lab.
`52`	Reduced services	When the test is partially reduced or limited and supports reduced reimbursement.
`59`	Distinct procedural service	When multiple unrelated procedures are reported on the same day and this test is distinct from other services billed.
`76`	Repeat procedure by same provider	When the exact test is repeated by the same lab on the same day for clinical reasons.
`78`	Unplanned return to the operating/procedural suite by same physician following initial procedure	Rare for lab testing; reserved when a repeat intraoperative lab run is required following an unplanned return.
`90`	Reference (duplicate entry intentional for common use)	When using an external reference laboratory to perform specialized testing.
`91`	Repeat clinical diagnostic test	When repeating the test on the same specimen or a new specimen to verify results (note: included if payer recognizes `91`).
`52`	Reduced services (duplicate entry to reflect common payer usage)	When partial processing or limited panel was performed versus the full assay.

Taxonomy Code	Specialty	Notes
207RR0500X	Clinical Biochemical Genetics	Laboratory specialists in metabolic testing and interpretation.
207RH0000X	Clinical Molecular Genetics	Providers ordering genetic correlation and counseling for peroxisomal disorders.
2084P0802X	Clinical Pathology	Pathologists who oversee laboratory testing and quality.
208D00000X	Pediatrics	Pediatricians and pediatric neurologists ordering VLCFA testing for developmental disorders.
2084N0400X	Neurology	Neurologists evaluating progressive neurodegenerative presentations.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E71.1`	Disorders of branched-chain amino-acid metabolism and fatty-acid metabolism	General category including disorders affecting fatty-acid beta-oxidation; VLCFA testing helps diagnose peroxisomal fatty-acid metabolism defects.
`E71.0`	Lipid storage disorders	Includes inherited disorders that may present with abnormal lipid profiles and warrant VLCFA analysis in differential diagnosis.
`G12.9`	Motor neuron disease, unspecified	Progressive neurologic decline may prompt metabolic testing including VLCFA measurement to evaluate for X-linked adrenoleukodystrophy.
`E27.4`	Other and unspecified adrenocortical insufficiency	Adrenal dysfunction can be associated with peroxisomal disorders such as X-linked adrenoleukodystrophy; VLCFA assists in evaluation.
`P94.2`	Neonatal feeding problems and metabolic dysfunction of newborns	Newborns with failure to thrive or hypotonia may undergo VLCFA testing as part of metabolic evaluation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`80053`	Comprehensive metabolic panel	Baseline metabolic assessment often ordered alongside specialized metabolic tests to evaluate organ function.
`84244`	Phenylalanine; quantitative	Other specialized metabolic amino acid testing that may be part of an expanded metabolic workup in infants.
`81406`	Molecular pathology procedure, targeted sequence analysis panel	Genetic testing for peroxisomal biogenesis or single-gene testing may follow abnormal VLCFA results to confirm diagnosis.
`81001`	Urinalysis, non-automated, without microscopy	Basic urine testing often performed in the initial metabolic or endocrine evaluation.
`80305`	Drug test, confirmation, any method	Not routinely related but occasionally ordered when differential includes toxic/metabolic exposures; included here as ancillary testing in complex inpatient evaluations.