Overview of CPT Code 20606:'Arthrocentesis, knee'
CPT Code 20606 refers to the procedure of arthrocentesis, specifically for the knee joint. This minimally invasive technique involves the aspiration of synovial fluid from the knee joint space, often for diagnostic or therapeutic purposes.
When CPT Code 20606 is Used?
Arthrocentesis of the knee is indicated in various clinical scenarios.
- Suspected joint effusion or swelling in the knee.
- Diagnosis of joint disorders such as gout or infection.
- Relief of pain and pressure due to excess fluid.
- Assessment of inflammatory conditions like rheumatoid arthritis.
Symptoms Indicating This Procedure
Patients may present with several symptoms that warrant arthrocentesis.
- Swelling or puffiness around the knee.
- Pain or tenderness in the knee joint.
- Limited range of motion in the knee.
- Warmth or redness over the knee area.
Causes and Risk Factors
Several factors can lead to the need for knee arthrocentesis.
- Trauma or injury to the knee.
- Degenerative joint diseases like osteoarthritis.
- Infections such as septic arthritis.
- Inflammatory conditions like lupus or rheumatoid arthritis.
Diagnostic Tests Before Procedure
Certain tests may be performed to guide the decision for arthrocentesis.
- X-rays to assess joint structure and rule out fractures.
- Ultrasound to visualize fluid accumulation.
- Blood tests to check for markers of inflammation or infection.
Procedure Description
The arthrocentesis procedure involves several key steps.
- Patient is positioned comfortably, often seated or lying down.
- Skin over the knee is cleaned with antiseptic solution.
- Local anesthesia may be administered to minimize discomfort.
- A sterile needle is inserted into the knee joint space to aspirate fluid.
- Fluid is collected in a sterile container for analysis.
- Needle is removed, and a bandage is applied to the site.
Preparation for the Procedure
Patients should follow specific guidelines before undergoing arthrocentesis.
- Inform the doctor about any medications, especially blood thinners.
- Avoid eating or drinking for a few hours prior if sedation is planned.
- Wear loose-fitting clothing to allow easy access to the knee.
Recovery and Aftercare
Post-procedure care is essential for optimal recovery.
- Rest the knee and avoid strenuous activities for 24-48 hours.
- Apply ice to reduce swelling and discomfort.
- Keep the puncture site clean and dry; change the bandage as needed.
- Follow up with the healthcare provider for results and further management.
Possible Complications
While generally safe, arthrocentesis can have risks.
- Infection at the injection site.
- Bleeding or hematoma formation.
- Damage to surrounding structures.
- Persistent pain or swelling after the procedure.


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Learn morePost-Procedure Follow-Up
Monitoring after the procedure is crucial.
- Schedule a follow-up appointment within a week to discuss fluid analysis.
- Report any signs of infection, increased pain, or swelling immediately.
- Regular check-ups may be needed for underlying conditions.
Alternative Treatments
There are non-invasive options available for knee issues.
- Physical therapy to strengthen the knee and improve mobility.
- Medications such as NSAIDs for pain relief.
- Corticosteroid injections to reduce inflammation.
- Bracing or orthotics to support the knee.
Home Care Tips
Patients can take steps at home to aid recovery.
- Elevate the knee to reduce swelling.
- Use over-the-counter pain relievers as directed.
- Engage in gentle range-of-motion exercises as tolerated.
- Stay hydrated and maintain a balanced diet.
Patient Education & Prevention
Understanding knee health can help prevent issues.
- Maintain a healthy weight to reduce stress on the knees.
- Engage in low-impact exercises to strengthen knee muscles.
- Avoid high-impact activities that may lead to injury.
- Regular check-ups for chronic conditions affecting the joints.
Billing and Coding Information
CPT Code: 20606
Category: Surgical Procedures
Common Modifiers:
- 50 - Bilateral procedure
- RT - Right side
- LT - Left side
Average Cost and Insurance Coverage
Costs can vary based on location and insurance.
- Average cost ranges from $200 to $600.
- Most insurance plans cover the procedure if medically necessary.
- Check with your insurance provider for specific coverage details.
Related CPT Codes
References and Sources