Summary & Overview
CPT 24100: Elbow Joint Tissue Sampling for Diagnostic Evaluation
CPT code 24100 represents a diagnostic procedure to remove a piece of tissue from the elbow joint for evaluation of intra‑articular disorders such as gout and rheumatoid arthritis. Nationally, this code captures a focused invasive diagnostic service used to obtain synovial tissue or intra‑articular samples when aspiration alone is insufficient. The procedure informs definitive diagnosis and subsequent treatment planning for inflammatory and crystal arthropathies.
Key payers considered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for use of CPT code 24100, typical sites of service where the procedure is performed, and the types of clinical scenarios that prompt tissue sampling. The publication also presents benchmarking and payment context where available, common modifier usage, and coding considerations relevant to billing and claims adjudication.
The material covers national-level policy and billing themes rather than state-specific rules, and highlights practical information clinicians and coding professionals use to align documentation with billing requirements. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 24100 describes an arthrocentesis procedure in which a provider removes a piece of tissue from within the elbow joint to assist diagnosis of intra‑articular conditions such as gout or rheumatoid arthritis. The procedure is a diagnostic synovial tissue sampling intended to obtain material for laboratory analysis and pathological assessment.
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Service type: Diagnostic joint tissue sampling (arthrocentesis/biopsy)
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Typical site of service: Hospital outpatient department, ambulatory surgery center, or physician office where minor invasive musculoskeletal procedures are performed.
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 52-year-old adult presenting to an outpatient orthopedic clinic with several weeks of progressive elbow pain, swelling, decreased range of motion, and intermittent joint effusion. Prior conservative measures including NSAIDs, aspiration, and activity modification have not established a diagnosis. The orthopedic surgeon schedules an intra-articular tissue biopsy of the elbow to obtain synovial or other intra-articular tissue for histopathology and crystal analysis to evaluate suspected inflammatory arthropathy such as rheumatoid arthritis, gout, or infectious synovitis. The procedure is performed in an ambulatory surgery center or hospital outpatient department with the patient under local anesthesia with sedation or regional nerve block; sterile prep and draping are used and fluoroscopic or ultrasound guidance may assist localization. Tissue samples are sent to pathology for microscopic evaluation and to the laboratory for culture and polarized light microscopy when crystals are suspected. Post-procedure monitoring occurs in recovery until discharge criteria are met, with instructions for wound care and signs of infection or neurovascular compromise.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician’s professional interpretation when a technical component is billed separately. |