ICD code definitions

CPT® Code 20605 – Arthrocentesis, Small Joint, With or Without Injection, Includes Aspiration and/or Injection of Anesthetic, Steroid, or Other Therapeutic Agent

November 5, 2025
3 min read
CPT® Code 20605

Description:
CPT® 20605 is used to report arthrocentesis (joint aspiration) and/or therapeutic injection performed on a small joint. Small joints typically include fingers, toes, wrists, and ankles. This procedure is commonly used to diagnose or treat conditions such as arthritis, gout, bursitis, or joint inflammation. The procedure may involve:

  • Aspiration of synovial fluid for diagnostic testing.
  • Injection of corticosteroids, hyaluronic acid, anesthetic, or other therapeutic agents to reduce pain and inflammation.

When to Use:

  • Patients presenting with joint pain, swelling, or limited range of motion in small joints.
  • When synovial fluid analysis is needed to confirm diagnosis (e.g., gout crystals, infection).
  • For therapeutic management of inflammatory joint conditions or degenerative arthritis.

Billing Requirements:

  • Documentation must include the joint treated, indication for the procedure, and whether aspiration, injection, or both were performed.
  • Only one small joint can be reported per CPT® 20605; additional joints require separate codes.
  • Use modifiers if multiple procedures or joints are treated during the same encounter to ensure accurate billing.

Includes:

  • Needle placement into a small joint.
  • Aspiration of synovial fluid if performed.
  • Injection of medications for therapeutic purposes.

Tips for Practice Efficiency:
Managing procedure coding, documentation, and follow-up care can be streamlined with an integrated EMR and practice management system like OptiMantra. With OptiMantra, providers can:

  • Automatically link arthrocentesis procedures to patient charts.
  • Track procedural outcomes and follow-up visits.
  • Ensure accurate CPT® coding and billing for enhanced reimbursement and compliance.

By integrating clinical documentation with billing and outcome tracking, OptiMantra helps practices perform procedures like CPT® 20605 efficiently while maintaining high-quality patient care.

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Jessica Castro
Jessica Castro

Jessica is a Massachusetts-based LPN with 13+ years of experience in patient care, healthcare technology, and education. As the Implementation and Customer Success Manager at OptiMantra, she helps providers optimize EMR solutions for better workflows and patient outcomes. With a Bachelor's in Community Health and a Master's in Healthcare Innovation in progress, she is passionate about leveraging technology to improve care delivery. Through her writing, she shares insights on healthcare best practices, EHR optimization, and patient advocacy to support providers in delivering exceptional care.