Summary & Overview
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.
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)
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 |