Summary & Overview
CPT 0358T: Body Composition Analysis Using Bioelectrical Impedance
CPT code 0358T identifies a diagnostic body composition analysis performed with bioelectrical impedance to estimate total body water, fat, and tissue composition and includes a written report. This procedure is clinically relevant for nutritional assessment, weight-management programs, and monitoring fluid status in various medical contexts. Nationally, standardized reporting and clear coding support consistent documentation, quality measurement, and billing transparency for practices offering body composition services.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what the code represents, typical sites of service, and the clinical context in which the service is used. The publication also outlines common modifiers and billing considerations where provided, summarizes available payer coverage patterns, and highlights operational benchmarks and documentation elements relevant to providers and billing staff.
The content is intended for a national audience and focuses on practical coding identification, clinical applicability, and administrative implications of CPT code 0358T. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 0358T describes a body composition analysis that uses electrical impedance to estimate the proportion of water, fat, and other tissues in the body. The provider measures the resistance of body tissues to electrical conductivity, derives total body water, and calculates body composition from the difference between body weight and total water. A written report of findings is prepared and documented.
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Service type: Body composition analysis using bioelectrical impedance
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Typical site of service: Outpatient clinic, physician office, or other ambulatory diagnostic setting
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45-year-old adult referred to an outpatient medical nutrition clinic or preventive medicine practice for assessment of body composition to guide weight management or evaluate fluid status. The provider reviews the patient’s medical history, measures height and weight, and performs a bioelectrical impedance analysis (BIA) study that uses the resistance of water, fat, and tissues to electrical conductivity to estimate total body water and derive lean mass and fat mass. The provider calculates body composition by comparing body weight to total body water and prepares a written report documenting findings, interpretation, and trends. Typical workflow includes patient preparation (hydration and recent activity review), electrode placement, data acquisition with the BIA device, calculation of body composition metrics, integration with prior measurements, and generation of a formal report for the referring clinician. Typical sites of service are outpatient clinic, physician office, ambulatory diagnostic center, or hospital outpatient department when performed as part of medical evaluation for obesity, sarcopenia, cachexia, or fluid imbalance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier/standard billing | Use when no special circumstance or modifier applies. |
22 |