Summary & Overview
CPT 82436: Urine Chloride Measurement for Electrolyte Assessment
CPT code 82436 represents the quantitative measurement of chloride in urine, a common clinical laboratory test used to assess electrolyte balance and support diagnosis and management of fluid and acid–base disorders. As an elemental electrolyte assay, this code is relevant across inpatient and outpatient settings and is performed frequently in hospital outpatient laboratories and independent clinical labs. Nationally, urine chloride testing informs clinical decisions in diverse settings, from emergency evaluations of volume status to chronic disease monitoring.
Key payers in the coverage landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what CPT code 82436 covers, typical sites of service, and where it fits in clinical workflows. The publication also provides benchmarks and payment policy context where available, summarizes common modifiers and billing considerations, and outlines clinical utility and coding relationships. Data not available in the input is noted where applicable. This resource is intended to clarify the clinical and billing identity of CPT code 82436 for payers, billing professionals, and clinicians operating at a national level.
Billing Code Overview
CPT code 82436 describes a laboratory measurement of chloride in a urine specimen. This test quantifies the amount of chloride ion present to assess electrolyte balance and aid in the evaluation of fluid and electrolyte disorders.
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Service type: Clinical laboratory test
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Typical site of service: Clinical laboratory or hospital outpatient laboratory
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting with electrolyte disturbance symptoms such as muscle cramps, weakness, confusion, or polyuria in the outpatient clinic, emergency department, or inpatient unit. The clinician orders a urine chloride test to evaluate volume status, differentiate causes of metabolic alkalosis, assess diuretic effect, or monitor electrolyte management in patients with suspected dehydration, congestive heart failure, or renal tubular disorders. A urine specimen (random, spot, or 24-hour as ordered) is collected by nursing or phlebotomy, labeled, and sent to the clinical laboratory. The laboratory technologist performs the quantitative chloride assay and reports the result to the ordering provider via the electronic medical record. Typical sites of service include hospital laboratories, outpatient hospital-based labs, ambulatory clinics, and reference laboratories.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Standard — no modifier | Use when no special modifier applies to the laboratory service. |
26 | Professional component | Use when billing only the professional interpretation component, if applicable for tests with professional interpretation. |