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Official Description

Arthrotomy, with biopsy; sacroiliac joint

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 27050 refers to an arthrotomy performed specifically on the sacroiliac joint (SIJ) for the purpose of obtaining tissue samples through a biopsy. This procedure is typically indicated for evaluating various conditions that may affect the sacroiliac joint, including pain, inflammatory diseases, infections, lesions, or tumors. The approach involves making a skin incision in the lower back, directly over the right or left sacroiliac joint. Following the incision, the surgeon carefully divides the soft tissues to expose the joint, allowing for a thorough examination of the joint surfaces and surrounding structures. During the procedure, any abnormalities observed in the bone or joint surfaces are documented, and biopsies may be taken from lesions, synovial tissue, cartilage, or bone as necessary. These tissue samples are crucial for further laboratory analysis, which is reported separately. After the biopsy is completed, the joint is typically flushed with a saline solution to ensure cleanliness, and the operative wound is meticulously closed in layers to promote proper healing.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The arthrotomy with biopsy of the sacroiliac joint is indicated for several specific conditions and symptoms that warrant further investigation. These include:

  • Pain Persistent or unexplained pain in the lower back or pelvic region that may be associated with the sacroiliac joint.
  • Inflammatory Disease Conditions such as arthritis or other inflammatory disorders that may affect the sacroiliac joint.
  • Infection Suspected infections in the joint area that require confirmation through tissue sampling.
  • Lesions The presence of abnormal growths or lesions in the sacroiliac joint that need to be evaluated for diagnosis.
  • Tumors Potential tumors that may be present in or around the sacroiliac joint, necessitating biopsy for further analysis.

2. Procedure

The procedure for performing an arthrotomy with biopsy of the sacroiliac joint involves several critical steps, each designed to ensure accurate tissue sampling and patient safety. The steps are as follows:

  • Step 1: Skin Incision A skin incision is made in the lower back, directly over the sacroiliac joint, either on the right or left side, depending on the location of the joint being examined. This incision allows access to the underlying structures.
  • Step 2: Division of Soft Tissues After the skin incision, the surgeon carefully divides the soft tissues, including muscles and fascia, to expose the sacroiliac joint. This step is crucial for gaining access to the joint while minimizing damage to surrounding tissues.
  • Step 3: Joint Exposure Once the soft tissues are divided, the joint is fully exposed. The surgeon examines the bone and joint surfaces for any abnormalities, which may include signs of inflammation, infection, or other pathological changes.
  • Step 4: Biopsy Collection If any lesions, synovial tissue, cartilage, or bone abnormalities are identified, the surgeon obtains biopsies of these tissues. These samples are essential for laboratory analysis to determine the underlying cause of the patient's symptoms.
  • Step 5: Joint Flushing After the biopsy is completed, the sacroiliac joint is flushed with a saline solution. This step helps to cleanse the joint area and remove any debris or contaminants that may have been introduced during the procedure.
  • Step 6: Wound Closure Finally, the operative wound is closed in layers. This meticulous closure technique is important for promoting proper healing and minimizing the risk of infection.

3. Post-Procedure

Post-procedure care following an arthrotomy with biopsy of the sacroiliac joint typically involves monitoring the patient for any signs of complications, such as infection or excessive bleeding. Patients may be advised to rest and limit physical activity for a specified period to facilitate healing. Pain management strategies may be implemented to address any discomfort following the procedure. Additionally, the healthcare provider may schedule follow-up appointments to review the biopsy results and discuss any further treatment options based on the findings. It is essential for patients to adhere to any specific post-operative instructions provided by their healthcare team to ensure optimal recovery.

Short Descr BIOPSY OF SACROILIAC JOINT
Medium Descr ARTHROTOMY W/BIOPSY SACROILIAC JOINT
Long Descr Arthrotomy, with biopsy; sacroiliac joint
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 159 - Other diagnostic procedures on musculoskeletal system
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
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Pre-1990 Added Code added.
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