Overview of CPT Code 21705: Ultrasound-guided aspiration of breast cyst
CPT Code 21705 refers to the procedure of ultrasound-guided aspiration of a breast cyst, which is a minimally invasive technique used to remove fluid from a cyst in the breast using ultrasound imaging for guidance.
When CPT Code 21705 is Used?
This procedure is indicated in various clinical scenarios.
- Presence of a palpable breast cyst causing discomfort or pain.
- Cystic lesions identified on imaging studies that require further evaluation.
- Cysts that are suspected to be symptomatic or causing cosmetic concerns.
Symptoms Indicating This Procedure
Patients may report several symptoms that lead to the consideration of this procedure.
- Localized breast pain or tenderness.
- A noticeable lump or swelling in the breast.
- Changes in breast shape or contour.
Causes and Risk Factors
Understanding the causes and risk factors can help in identifying patients who may benefit from this procedure.
- Hormonal changes during menstrual cycles.
- Family history of breast cysts or breast disease.
- Age, particularly women aged 30-50 years.
Diagnostic Tests Before Procedure
Several diagnostic tests may be performed to guide the decision for this procedure.
- Breast ultrasound to confirm the presence of a cyst.
- Mammography to rule out other breast abnormalities.
- Fine needle aspiration cytology if indicated.
Procedure Description
The procedure is performed in a clinical setting with the following steps.
- Patient is positioned comfortably, usually lying on their back.
- Ultrasound is used to locate the cyst accurately.
- A sterile needle is inserted into the cyst under ultrasound guidance.
- Fluid is aspirated from the cyst using a syringe.
- The needle is removed, and a bandage is applied to the site.
Preparation for the Procedure
Patients should follow specific guidelines to prepare for the procedure.
- Inform the physician about any medications being taken.
- Avoid blood thinners or aspirin prior to the procedure if advised.
- Wear comfortable clothing and avoid wearing jewelry on the day of the procedure.
Recovery and Aftercare
Post-procedure care is essential for optimal recovery.
- Rest for the remainder of the day after the procedure.
- Apply ice packs to the area to reduce swelling if needed.
- Monitor the site for signs of infection such as increased redness or discharge.
Possible Complications
While generally safe, there are potential risks associated with the procedure.
- Infection at the site of aspiration.
- Bleeding or hematoma formation.
- Recurrence of the cyst after aspiration.


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Learn morePost-Procedure Follow-Up
Follow-up care is important to ensure proper healing.
- Schedule a follow-up appointment within a week to assess the site.
- Monitor for any recurrence of symptoms or cyst formation.
- Discuss results of any fluid analysis if performed.
Alternative Treatments
There are non-surgical options available for managing breast cysts.
- Observation and regular monitoring of the cyst.
- Hormonal therapy to manage symptoms.
- Lifestyle modifications such as dietary changes.
Home Care Tips
Patients can take simple steps at home to aid recovery.
- Keep the aspiration site clean and dry.
- Avoid strenuous activities for a few days post-procedure.
- Take over-the-counter pain relievers as needed.
Patient Education & Prevention
Educating patients can help in preventing recurrence.
- Regular breast self-exams to monitor for changes.
- Maintain a healthy lifestyle to reduce risk factors.
- Discuss any new breast symptoms with a healthcare provider promptly.
Billing and Coding Information
CPT Code: 21705
Category: Surgical Procedures
Common Modifiers:
- 50 - Bilateral procedure
- RT - Right side
- LT - Left side
Average Cost and Insurance Coverage
Understanding the financial aspects can help patients prepare.
- Average cost ranges from $300 to $800 depending on facility and location.
- Most insurance plans cover the procedure if deemed medically necessary.
- Patients should verify coverage with their insurance provider.
Related CPT Codes
References and Sources