20610

Arthrocentesis, Aspiration, and/or Injection; Large Joint or Bursa

CPT code 20610 describes the procedure of arthrocentesis, which involves the aspiration of fluid from a joint or bursa, and/or the injection of therapeutic substances into a large joint or bursa. This procedure is commonly performed for both diagnostic and therapeutic purposes. Diagnostically, aspiration allows for the collection of synovial fluid, which can then be analyzed for signs of infection (e.g., bacterial culture, cell count), inflammation (e.g., crystal analysis for gout or pseudogout), or hemorrhage. Therapeutically, injections are used to deliver medications directly into the joint space or bursa to reduce pain and inflammation. Common injectates include corticosteroids (e.g., triamcinolone, methylprednisolone) for anti-inflammatory effects, local anesthetics (e.g., lidocaine, bupivacaine) for immediate pain relief, and hyaluronic acid derivatives (viscosupplementation) to improve joint lubrication and reduce pain in conditions like osteoarthritis. The procedure typically involves cleaning the skin, administering local anesthesia, inserting a needle into the joint or bursa, aspirating fluid if indicated, and then injecting the therapeutic agent. This code specifically applies to 'large' joints, such as the shoulder (glenohumeral), elbow, hip, knee, or ankle, and large bursae (e.g., trochanteric, subacromial). It is a minimally invasive procedure usually performed in an outpatient setting or physician's office.

Clinical Indications

  • Osteoarthritis (degenerative joint disease) with pain and/or effusion
  • Rheumatoid arthritis or other inflammatory arthropathies
  • Acute or chronic bursitis (e.g., trochanteric, subacromial, olecranon, prepatellar)
  • Joint effusion (excess fluid in the joint space)
  • Diagnosis of septic arthritis (suspected joint infection)
  • Diagnosis of crystal-induced arthritis (gout, pseudogout)
  • Synovial cysts (e.g., Baker's cyst)
  • Post-traumatic joint pain and inflammation
  • Impingement syndromes (e.g., shoulder impingement)
  • Adhesive capsulitis (frozen shoulder) for pain relief prior to manipulation
  • Tendonitis (when associated with an inflamed bursa, e.g., rotator cuff tendinitis with subacromial bursitis)

Procedure Steps

  1. Obtain informed consent from the patient and verify patient identity and procedure site.
  2. Position the patient appropriately to allow access to the joint or bursa.
  3. Sterilize the skin over the injection site using an antiseptic solution (e.g., povidone-iodine, chlorhexidine).
  4. Administer local anesthetic (e.g., lidocaine) to the skin and subcutaneous tissue using a small gauge needle.
  5. Carefully insert an appropriate gauge needle into the joint space or bursa, often confirmed by aspiration of synovial fluid or lack of resistance.
  6. If diagnostic aspiration is required, withdraw synovial fluid into a syringe and send for laboratory analysis.
  7. Attach a syringe containing the therapeutic agent (corticosteroid, anesthetic, hyaluronic acid) and inject the solution into the joint or bursa.
  8. Withdraw the needle and apply gentle pressure with a sterile gauze pad to prevent bleeding or leakage.
  9. Apply a sterile dressing or bandage over the injection site.
  10. Provide post-procedure instructions, including activity restrictions, pain management, and signs of complications.

Coding Guidelines

  • Report CPT code 20610 once per joint or bursa, regardless of the number of injections performed within that single joint or bursa during the same encounter.
  • If multiple large joints or bursae are injected during the same encounter, append modifier -59 (Distinct Procedural Service) or an appropriate anatomical modifier (e.RT, .LT, .50) to subsequent units of 20610 to indicate separate sites.
  • Do not report 20610 for injection of tendon sheaths, ligaments, ganglion cysts, or trigger points; use appropriate codes like 20550, 20551, or 20552 for these services.
  • The cost of the injectate (e.g., corticosteroid, anesthetic) is typically included in the reimbursement for 20610 unless separately specified by payer policy or for certain biologics (e.g., hyaluronic acid, which may have its own J-code).
  • Imaging guidance (e.g., ultrasound, fluoroscopy) performed with 20610 may be reported separately using codes such as 76942 (ultrasound) or 77002/77003 (fluoroscopy), when medically necessary and documented, and according to payer guidelines.
  • This code should not be reported for injections into small or intermediate joints; refer to 20600 (small joint) and 20605 (intermediate joint).
  • Do not report aspiration and injection separately when both are performed in the same joint/bursa at the same encounter; 20610 covers both.

Associated ICD-10 Codes