Summary & Overview
CPT 82693: Ethylene Glycol Quantitative Assay
CPT code 82693 identifies a quantitative laboratory test for ethylene glycol, the toxic main component of automotive antifreeze. This test is clinically significant because ethylene glycol ingestion can cause severe metabolic disturbances and organ failure; laboratory detection often represents a medical emergency and triggers urgent clinician notification. Nationally, the availability and timely performance of this assay affect emergency care pathways, toxicology management, and inpatient resource use.
Key payers considered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the assay, typical sites of service, and a review of operational considerations relevant to billing and reporting. The publication summarizes common modifiers used with laboratory services, highlights the test’s role in emergency and critical care workflows, and outlines what to expect in payer coverage patterns and claims processing practices. It also notes where input data is not available.
This overview equips laboratory managers, emergency clinicians, and revenue-cycle professionals with the practical information needed to identify when CPT code 82693 applies, understand its clinical urgency, and anticipate payer interactions on a national scale.
Billing Code Overview
CPT code 82693 measures the level of ethylene glycol in a biological sample. Ethylene glycol is a highly toxic, sweet-tasting compound most commonly encountered as the primary ingredient in automotive antifreeze. When present, results can represent a clinical emergency; positive results are considered panic values that require urgent clinician notification.
-
Service type: Laboratory toxicology test for quantitative measurement of a toxic alcohol
-
Typical site of service: Hospital laboratories, clinical reference laboratories, and emergency department-associated labs where rapid toxicology results are required
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult or pediatric patient presenting to the emergency department or urgent care with altered mental status, inebriation out of proportion to reported alcohol intake, metabolic acidosis, anion gap elevation, oxalate crystals on urinalysis, or a history suspicious for ingestion of antifreeze or industrial products. The clinician orders a serum ethylene glycol level to confirm exposure and quantify toxicity. The laboratory receives a serum or plasma specimen labeled with patient identifiers, performs a quantitative assay for ethylene glycol, and reports results immediately as a panic value if above toxic thresholds. Results are communicated urgently to the ordering clinician and the treating team (toxicology, emergency medicine, critical care, or pediatrics). Typical workflow includes specimen collection in ED or inpatient setting, rapid transport to the clinical chemistry/toxicology laboratory, sample processing (centrifugation, analysis via enzymatic assay or gas chromatography), verification by laboratory personnel, and immediate clinician notification for positive or clinically significant results. This test is commonly ordered alongside basic metabolic panel, arterial blood gas, serum osmolality, and toxicology screens to guide antidotal therapy (e.g., fomepizole) and hemodialysis decisions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Professional component | Use when reporting the physician's interpretation or oversight of the test separate from the laboratory technical component, when applicable in billing contexts that separate professional and technical services. |