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Official Description

Arthrotomy with biopsy; interphalangeal joint, each

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 26110 refers to an arthrotomy with biopsy specifically performed on the interphalangeal joint, which is a type of surgical procedure. An arthrotomy involves making an incision into a joint to gain access for examination or treatment. In this case, the focus is on the interphalangeal joints, which are the joints located between the phalanges (the bones of the fingers). Each hand contains nine interphalangeal joints: one in the thumb and two in each of the four fingers. The procedure is typically indicated when there is a need to investigate joint pathology or obtain tissue samples for diagnostic purposes. During the procedure, the surgeon carefully dissects the soft tissues surrounding the joint, ensuring the protection of nearby nerves and blood vessels. Once the joint capsule is exposed, it is incised to allow for visual inspection and the collection of tissue samples from the joint capsule or synovial membrane. These samples are then sent for laboratory evaluation to assist in diagnosing any underlying conditions. It is important to note that this procedure is reported for each interphalangeal joint that is treated, allowing for accurate coding and billing based on the number of joints involved.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 26110 is indicated for various conditions affecting the interphalangeal joints. These may include:

  • Joint Pain Persistent pain in the interphalangeal joints that may require further investigation.
  • Swelling Notable swelling in the joints that could indicate underlying pathology.
  • Limited Range of Motion Difficulty in moving the fingers due to joint issues.
  • Suspected Infections Potential infections within the joint that necessitate biopsy for diagnosis.
  • Arthritis Conditions such as osteoarthritis or rheumatoid arthritis affecting the interphalangeal joints.

2. Procedure

The procedure for CPT® Code 26110 involves several key steps to ensure proper access and evaluation of the interphalangeal joint:

  • Step 1: Anesthesia The procedure typically begins with the administration of local or general anesthesia to ensure the patient is comfortable and pain-free during the surgery.
  • Step 2: Incision A surgical incision is made over the affected interphalangeal joint. The incision is carefully placed to minimize damage to surrounding tissues.
  • Step 3: Dissection The surgeon dissects the soft tissues surrounding the joint, taking care to protect nearby nerves and blood vessels. This step is crucial to avoid complications and ensure a clear view of the joint.
  • Step 4: Joint Capsule Exposure Once the soft tissues are adequately dissected, the joint capsule is exposed. The surgeon then incises the joint capsule to gain access to the interior of the joint.
  • Step 5: Inspection and Biopsy The interior of the joint is visually inspected for any abnormalities. Tissue samples are obtained from the joint capsule and/or synovial membrane for laboratory evaluation. These samples are critical for diagnosing any underlying conditions affecting the joint.
  • Step 6: Closure After the biopsy is completed, the joint capsule and surrounding tissues are carefully closed in layers, and the incision is sutured to promote healing.

3. Post-Procedure

Following the arthrotomy with biopsy of the interphalangeal joint, patients may require specific post-procedure care. This typically includes monitoring for any signs of infection or complications at the incision site. Patients are often advised to keep the affected hand elevated to reduce swelling and to apply ice as needed. Pain management may be necessary, and the physician may prescribe analgesics to help manage discomfort. Patients should also be instructed on how to care for the surgical site, including keeping it clean and dry. Follow-up appointments are essential to review biopsy results and assess the healing process. Depending on the findings, further treatment or interventions may be recommended based on the biopsy results.

Short Descr BIOPSY FINGER JOINT LINING
Medium Descr ARTHROTOMY BIOPSY INTERPHALANGEAL JOINT EACH
Long Descr Arthrotomy with biopsy; interphalangeal joint, each
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) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
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) P5B - Ambulatory procedures - musculoskeletal
MUE 2
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).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
F1 Left hand, second digit
F2 Left hand, third digit
F3 Left hand, fourth digit
F4 Left hand, fifth digit
F5 Right hand, thumb
F6 Right hand, second digit
F7 Right hand, third digit
F8 Right hand, fourth digit
F9 Right hand, fifth digit
FA Left hand, thumb
GC This service has been performed in part by a resident under the direction of a teaching physician
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)
SG Ambulatory surgical center (asc) facility service
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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Pre-1990 Added Code added.
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