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CPT 1002T: Air Displacement Plethysmography for Body Composition

CPT code 1002T represents air displacement plethysmography for measuring body volume and composition, with a provider-prepared interpretation and written report. This diagnostic body composition test offers an objective measure of body fat and lean mass that can inform clinical decisions in weight management, metabolic risk assessment, and research. Nationally, standardized coding for this service matters for consistent documentation, quality measurement, and coverage determinations as demand for body composition assessment grows.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what CPT code 1002T covers, typical sites of service, and the clinical context for use. The publication also outlines common benchmarking topics and policy considerations relevant to payers and providers, including coverage variability and reporting expectations. Clinical context covers the role of air displacement plethysmography in assessing body composition compared with other measurement modalities.

This resource is intended for coding professionals, clinical leaders, and payer policy analysts seeking a national perspective on documentation and reporting for CPT code 1002T. Data not available in the input is noted where applicable.

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Billing Code Overview

CPT code 1002T describes the use of air displacement plethysmography to measure a patient's body volume and composition. The procedure places the patient in a sealed chamber to determine the amount of air displaced by the body. The provider prepares an interpretation and written report of the findings based on those measurements.

Service type: Body composition measurement / Diagnostic body composition testing

Typical site of service: Outpatient diagnostic facility or clinic with access to air displacement plethysmography equipment (sealed chamber)

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CPT 1002T: Air Displacement Plethysmography for Body Composition

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Billing Code Overview

Service type: Body composition measurement / Diagnostic body composition testing

Typical site of service: Outpatient diagnostic facility or clinic with access to air displacement plethysmography equipment (sealed chamber)

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult referred by primary care or a specialty clinic for objective assessment of body composition to guide weight management, metabolic risk stratification, or pre-/post-intervention evaluation. The patient presents to an outpatient metabolic testing lab or a hospital-based body composition clinic. After registration and screening for contraindications (e.g., inability to sit upright, claustrophobia, recent major thoracic surgery), the technologist reviews the indication, obtains informed consent, measures height and weight, and explains the procedure. The patient removes heavy clothing and jewelry, changes into a gown if required, and enters the sealed Bod Pod (air displacement plethysmography) chamber. The technologist performs calibration and baseline breathing checks, obtains the body volume measurements while the patient remains still and breathes quietly, and then repeats measurements as needed for accuracy. The provider (physician, exercise physiologist, or trained clinician) interprets the resulting body composition report (fat mass, lean mass, body density) and documents a formal written report with findings and clinical observations. Typical sites of service are outpatient diagnostic imaging or physiology labs and ambulatory surgery centers with specialized metabolic testing areas. Typical clinical indications include evaluation of obesity, sarcopenia assessment in older adults, monitoring body composition change after bariatric surgery or weight-loss interventions, and athletic performance optimization.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure	Use when a separate E/M is medically necessary and documented on the same day as the plethysmography service
`26`	Professional component	Use when reporting only the provider interpretation/report separate from facility technical component
`TC`	Technical component	Use when reporting only the facility/technical portion of the test (equipment, technologist) if separate billing is allowed
`59`	Distinct procedural service	Use when another unrelated procedure is performed the same day and documentation supports distinctness
`76`	Repeat procedure by same physician	Use when the test is repeated later the same day by the same provider
`77`	Repeat procedure by another physician	Use when the test is repeated by a different physician the same day
`90`	Reference (outside) laboratory	Not typically used for imaging-based body composition; use only if an external lab/reading service provides the report
`52`	Reduced services	Use when the service provided is partially reduced or not performed as described by the full code
`GA`	Waiver of liability statement on file	Use when the patient has signed ABN/waiver for noncovered service and the payer requires `GA`
`Q6`	Provider-based laboratory	Use when the service is performed in a provider-based laboratory setting as defined by payer rules

Taxonomy Code	Specialty	Notes
`207RR0500X`	Obesity Medicine Specialist	Physicians who manage weight-related conditions often order and interpret body composition testing
`207VG0400X`	Internal Medicine	Primary care internists commonly refer for or interpret body composition testing for metabolic risk
`173100000X`	Exercise Physiologist	Allied health professionals who frequently perform and interpret body composition assessments in clinical and fitness settings
`2084P0800X`	Pediatrician	Pediatric specialists may perform age-appropriate body composition testing for growth and obesity assessments
`207L00000X`	Family Medicine	Family physicians order and review body composition testing as part of comprehensive care

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E66.9`	Obesity, unspecified	Common indication for body composition testing to quantify fat mass and guide weight-management planning
`R63.5`	Abnormal weight gain	Used when evaluating patients with recent unexplained weight gain where composition measurement aids assessment
`M62.81`	Muscle weakness (generalized)	Relevant when assessing sarcopenia or loss of lean mass contributing to functional decline
`Z68.3`	Body mass index (BMI) 30.0-39.9, adult	Used to document obesity class I–II and to justify body composition testing
`Z71.3`	Dietary counseling and surveillance	Often linked to body composition testing as part of nutrition intervention programs
`E66.01`	Morbid (severe) obesity due to excess calories	Indication for pre- and post-bariatric surgery body composition evaluation
`Z13.220`	Encounter for screening for lipoid disorders	May be used when body composition testing is part of metabolic risk screening

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`1002T`	Air displacement plethysmography for body composition; includes interpretation and written report	Primary procedure: measurement and reporting of body volume and composition
`36415`	Collection of venous blood by venipuncture	Often performed before or after body composition testing when metabolic labs (glucose, lipids) are ordered concurrently
`99406`	Smoking and tobacco use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	Behavioral counseling services that may be provided the same visit in weight management programs; bill separately when documented
`97001`	Physical therapy evaluation	Performed in multidisciplinary programs where functional assessment complements body composition testing (use when PT evaluation is done same day)
`S9445`	Patient education, not otherwise classified, diet or nutrition counseling	Often part of comprehensive weight-management visits coordinated with body composition assessment

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure	Use when a separate E/M is medically necessary and documented on the same day as the plethysmography service
`26`	Professional component	Use when reporting only the provider interpretation/report separate from facility technical component
`TC`	Technical component	Use when reporting only the facility/technical portion of the test (equipment, technologist) if separate billing is allowed
`59`	Distinct procedural service	Use when another unrelated procedure is performed the same day and documentation supports distinctness
`76`	Repeat procedure by same physician	Use when the test is repeated later the same day by the same provider
`77`	Repeat procedure by another physician	Use when the test is repeated by a different physician the same day
`90`	Reference (outside) laboratory	Not typically used for imaging-based body composition; use only if an external lab/reading service provides the report
`52`	Reduced services	Use when the service provided is partially reduced or not performed as described by the full code
`GA`	Waiver of liability statement on file	Use when the patient has signed ABN/waiver for noncovered service and the payer requires `GA`
`Q6`	Provider-based laboratory	Use when the service is performed in a provider-based laboratory setting as defined by payer rules

Taxonomy Code	Specialty	Notes
`207RR0500X`	Obesity Medicine Specialist	Physicians who manage weight-related conditions often order and interpret body composition testing
`207VG0400X`	Internal Medicine	Primary care internists commonly refer for or interpret body composition testing for metabolic risk
`173100000X`	Exercise Physiologist	Allied health professionals who frequently perform and interpret body composition assessments in clinical and fitness settings
`2084P0800X`	Pediatrician	Pediatric specialists may perform age-appropriate body composition testing for growth and obesity assessments
`207L00000X`	Family Medicine	Family physicians order and review body composition testing as part of comprehensive care

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E66.9`	Obesity, unspecified	Common indication for body composition testing to quantify fat mass and guide weight-management planning
`R63.5`	Abnormal weight gain	Used when evaluating patients with recent unexplained weight gain where composition measurement aids assessment
`M62.81`	Muscle weakness (generalized)	Relevant when assessing sarcopenia or loss of lean mass contributing to functional decline
`Z68.3`	Body mass index (BMI) 30.0-39.9, adult	Used to document obesity class I–II and to justify body composition testing
`Z71.3`	Dietary counseling and surveillance	Often linked to body composition testing as part of nutrition intervention programs
`E66.01`	Morbid (severe) obesity due to excess calories	Indication for pre- and post-bariatric surgery body composition evaluation
`Z13.220`	Encounter for screening for lipoid disorders	May be used when body composition testing is part of metabolic risk screening

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`1002T`	Air displacement plethysmography for body composition; includes interpretation and written report	Primary procedure: measurement and reporting of body volume and composition
`36415`	Collection of venous blood by venipuncture	Often performed before or after body composition testing when metabolic labs (glucose, lipids) are ordered concurrently
`99406`	Smoking and tobacco use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	Behavioral counseling services that may be provided the same visit in weight management programs; bill separately when documented
`97001`	Physical therapy evaluation	Performed in multidisciplinary programs where functional assessment complements body composition testing (use when PT evaluation is done same day)
`S9445`	Patient education, not otherwise classified, diet or nutrition counseling	Often part of comprehensive weight-management visits coordinated with body composition assessment

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 1002T: Air Displacement Plethysmography for Body Composition

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Billing Code Overview

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CPT 1002T: Air Displacement Plethysmography for Body Composition

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

References

CPT 1002T: Air Displacement Plethysmography for Body Composition

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Billing Code Overview

CPT 1002T: Air Displacement Plethysmography for Body Composition

Sign up for cpt 1002T policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

What does CPT 1002T cover and what results are reported?

Where is this service typically performed and for which patients?

Which modifiers apply to CPT 1002T and when are they used?

What other CPT codes are commonly billed alongside 1002T?

Which payers are referenced and does the page provide coverage or reimbursement rates?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

What does CPT 1002T cover and what results are reported?

Where is this service typically performed and for which patients?

Which modifiers apply to CPT 1002T and when are they used?

What other CPT codes are commonly billed alongside 1002T?

Which payers are referenced and does the page provide coverage or reimbursement rates?

References