Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Replacement, pulmonary valve

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 33475 refers to the surgical replacement of the pulmonary valve, which is a critical component of the heart that regulates blood flow from the right ventricle to the pulmonary artery. This procedure is indicated when the pulmonary valve is severely damaged and cannot be repaired through less invasive techniques. The replacement can involve the use of either a mechanical valve, which is made from synthetic materials such as plastic, metal, and pyrolytic carbon, or a biological valve, which is derived from animal tissues, such as porcine valves or valves from cadaver donors. The surgical approach typically involves a median sternotomy, which is an incision made along the sternum to provide access to the heart. During the procedure, cardiopulmonary bypass is established to maintain blood circulation and oxygenation while the heart is being operated on. The main pulmonary artery is then incised above the pulmonary valve to allow for inspection and potential replacement of the valve. If the size of the valve annulus is adequate, the replacement can be performed through this approach; otherwise, a transventricular approach may be necessary, which involves opening the right ventricle. The excision of the damaged valve leaflets, debridement of the valve annulus, and precise placement of the artificial valve are critical steps in ensuring the success of the procedure. After the valve is secured with non-absorbable sutures or pledgets, it is tested for proper function before concluding the surgery and closing the chest. This detailed explanation underscores the complexity and importance of the pulmonary valve replacement procedure in restoring normal heart function.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The pulmonary valve replacement procedure is indicated in the following scenarios:

  • Severe Valve Damage Replacement is required when the pulmonary valve is too severely damaged to be repaired by other techniques.
  • Congenital Heart Defects Patients with congenital heart defects that affect the pulmonary valve may require replacement to ensure proper blood flow.
  • Valvular Stenosis The procedure may be indicated in cases of significant valvular stenosis, where the valve does not open properly, impeding blood flow.
  • Valvular Regurgitation Replacement may also be necessary in cases of severe regurgitation, where the valve fails to close completely, allowing blood to flow backward.

2. Procedure

The procedure for pulmonary valve replacement involves several critical steps to ensure successful replacement of the damaged valve:

  • Step 1: Median Sternotomy The surgical team begins by performing a median sternotomy, which involves making an incision along the sternum to gain access to the heart. This approach allows for optimal visibility and access to the pulmonary valve.
  • Step 2: Establishing Cardiopulmonary Bypass Once access is achieved, cardiopulmonary bypass is established. This technique temporarily takes over the function of the heart and lungs, allowing the surgeon to operate on a still and bloodless field.
  • Step 3: Incision of the Main Pulmonary Artery The main pulmonary artery is then incised above the level of the pulmonary valve. This incision provides direct access to the valve for inspection and replacement.
  • Step 4: Inspection of the Valve The surgeon inspects the pulmonary valve and assesses the size of the valve annulus. If the annulus is of adequate size, the replacement can proceed through the pulmonary artery.
  • Step 5: Transventricular Approach (if necessary) If the valve annulus is not large enough for replacement via the pulmonary artery, the incision is extended, and the right ventricle is opened to allow for a transventricular approach to the valve.
  • Step 6: Excision of Valve Leaflets The damaged pulmonary valve leaflets are excised, removing the non-functional valve components from the heart.
  • Step 7: Debridement and Measurement The valve annulus is then debrided to prepare it for the new valve, and its size is measured to ensure proper fit for the artificial valve.
  • Step 8: Placement of Artificial Valve An artificial valve, either mechanical or biological, is sutured into place using non-absorbable sutures or pledgets, ensuring secure attachment to the annulus.
  • Step 9: Testing Valve Function After placement, the new valve is tested to ensure that it opens and closes properly, confirming its functionality before closing the heart.
  • Step 10: Closure of the Heart and Weaning Off Bypass The heart is then closed, and the patient is gradually weaned off of cardiopulmonary bypass, allowing the heart to resume its normal function.
  • Step 11: Placement of Chest Tubes Chest tubes are placed as needed to drain any excess fluid or blood from the chest cavity, and the chest is subsequently closed.

3. Post-Procedure

Post-procedure care following a pulmonary valve replacement includes monitoring the patient for any complications, managing pain, and ensuring proper recovery. Patients may require close observation in a recovery unit to monitor heart function and vital signs. The placement of chest tubes will facilitate drainage and prevent fluid accumulation. Patients are typically advised on activity restrictions during the initial recovery phase to allow for healing. Follow-up appointments will be necessary to assess the function of the new valve and overall heart health. Rehabilitation may also be recommended to help patients regain strength and endurance following surgery.

Short Descr REPLACEMENT PULMONARY VALVE
Medium Descr REPLACEMENT PULMONARY VALVE
Long Descr Replacement, pulmonary valve
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 1
CCS Clinical Classification 43 - Heart valve procedures

This is a primary code that can be used with these additional add-on codes.

33141 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting PUB 100 CPT Assistant Article Transmyocardial laser revascularization, by thoracotomy; performed at the time of other open cardiac procedure(s) (List separately in addition to code for primary procedure)
33257 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), limited (eg, modified maze procedure) (List separately in addition to code for primary procedure)
33259 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), extensive (eg, maze procedure), with cardiopulmonary bypass (List separately in addition to code for primary procedure)
33530 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Illustration for Code Reoperation, coronary artery bypass procedure or valve procedure, more than 1 month after original operation (List separately in addition to code for primary procedure)
33924 Addon Code MPFS Status: Active Code APC C CPT Assistant Article Ligation and takedown of a systemic-to-pulmonary artery shunt, performed in conjunction with a congenital heart procedure (List separately in addition to code for primary procedure)
34714 Addon Code MPFS Status: Active Code APC N ASC N1 Open femoral artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by groin incision, unilateral (List separately in addition to code for primary procedure)
34716 Addon Code MPFS Status: Active Code APC N ASC N1 Open axillary/subclavian artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by infraclavicular or supraclavicular incision, unilateral (List separately in addition to code for primary procedure)
34833 Addon Code Resequenced Code MPFS Status: Active Code APC C CPT Assistant Article Open iliac artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by abdominal or retroperitoneal incision, unilateral (List separately in addition to code for primary procedure)
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).
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.
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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
GC This service has been performed in part by a resident under the direction of a teaching physician
RT Right side (used to identify procedures performed on the right side of the body)
Date
Action
Notes
2011-01-01 Changed Short description changed.
1994-01-01 Added First appearance in code book in 1994.
Code
Description
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"