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Official Description

Exploration for postoperative hemorrhage, thrombosis or infection; abdomen

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 35840 refers to the procedure of exploration for postoperative hemorrhage, thrombosis, or infection specifically in the abdomen. This procedure is performed when a patient exhibits symptoms that suggest complications following a surgical operation. Such symptoms may include a low red blood cell count indicative of hemorrhage, pain, redness, swelling, or shortness of breath that may suggest thrombosis, and fever, redness, swelling, or tenderness over the surgical site that may indicate an infection. When non-surgical interventions do not alleviate these symptoms, the patient is taken back to the operating room for a thorough exploration of the surgical site. During this procedure, the surgical incision is reopened to allow for a detailed inspection of the area. The surgeon will control any bleeding through methods such as ligation or cautery, evacuate any blood clots present, and address any signs of infection by draining abscesses and flushing the wound with normal saline or an antibiotic solution. Depending on the findings, drains may be placed to facilitate further drainage, and the surgical wound may either be closed or packed with gauze to promote healing. This code is specifically designated for abdominal explorations, with other codes available for similar procedures in different anatomical locations, such as the neck, chest, and extremities.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure coded as CPT® 35840 is indicated for patients who exhibit symptoms suggestive of postoperative complications following abdominal surgery. These indications include:

  • Postoperative Hemorrhage: Symptoms may include a low red blood cell count, which can indicate significant blood loss.
  • Thrombosis: Patients may present with pain, redness, swelling, and/or shortness of breath, which are indicative of potential blood clots.
  • Infection: Signs of infection may manifest as fever, redness, swelling, and/or tenderness over the surgical site.

2. Procedure

The procedure involves several critical steps to ensure thorough exploration and management of the surgical site. These steps include:

  • Step 1: The patient is taken back to the operating room where the surgical incision is reopened. This allows access to the previously operated area for inspection.
  • Step 2: A thorough inspection of the surgical site is conducted to identify any sources of bleeding, thrombosis, or infection. The surgeon carefully evaluates the area for any abnormalities.
  • Step 3: If any bleeding is detected, it is controlled using techniques such as ligation or cautery to prevent further blood loss.
  • Step 4: Any blood clots present in the area are evacuated to restore normal blood flow and reduce the risk of complications.
  • Step 5: In cases where infection is suspected, the surgeon will open any abscess pockets and drain pus and fluid to manage the infection effectively.
  • Step 6: The surgical wound is then flushed with normal saline or an antibiotic solution to cleanse the area and reduce the risk of further infection.
  • Step 7: Depending on the findings during the exploration, drains may be placed to facilitate ongoing drainage of any fluids.
  • Step 8: Finally, the surgical wound may be either closed or packed with gauze, depending on the extent of the findings and the surgeon's judgment regarding optimal healing.

3. Post-Procedure

After the procedure, the patient will be monitored for any signs of complications or recurrence of symptoms. Post-procedure care may include pain management, monitoring for signs of infection, and ensuring that any drains placed are functioning properly. The surgical site will be assessed regularly to evaluate healing and to determine if further intervention is necessary. Follow-up appointments may be scheduled to ensure the patient is recovering appropriately and to address any ongoing concerns related to the surgical site.

Short Descr EXPLORE ABDOMINAL VESSELS
Medium Descr EXPL PO HEMRRG THROMBOSIS/INFCTJ ABD
Long Descr Exploration for postoperative hemorrhage, thrombosis or infection; abdomen
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) 2 - Payment restriction for assistants at surgery does not apply 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 Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 2
CCS Clinical Classification 61 - Other OR procedures on vessels other than head and neck
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.)
GC This service has been performed in part by a resident under the direction of a teaching physician
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).
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
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.
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.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AG Primary physician
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
LT Left side (used to identify procedures performed on the left side of the body)
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
RT Right side (used to identify procedures performed on the right side of the body)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
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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