Introduction: Coding the Full Lifecycle of a Central Venous Access Device
A central venous access device (CVAD) is rarely a “place it and forget it” procedure. Over the life of a catheter, physicians may need to repair it, replace part or all of it, remove it, reposition it, clear an obstruction from it, or sample blood through it. Each of these scenarios has its own distinct CPT code, and selecting the correct one requires careful attention to what exactly was done, how it was accessed, and whether imaging guidance was used. This guide walks medical coders through the full CPT code set for central venous catheter repair, replacement, removal, guidance, and related maintenance procedures.
Repair of a Central Venous Catheter or Device
Although uncommon, a central catheter or device is occasionally repaired rather than exchanged or replaced entirely.
36575 — Repair of tunneled or non-tunneled central venous access catheter, without subcutaneous port or pump, central or peripheral insertion site
36576 — Repair of central venous access device, with subcutaneous port or pump, central or peripheral insertion site
These two codes are differentiated solely by the presence or absence of a port or pump:
- Assign 36575 for repair of a tunneled or non-tunneled, centrally or peripherally inserted catheter that does not include a port or pump — the catheter itself is repaired without being replaced.
- Assign 36576 for repair of a central venous catheter that does include a port or pump.
Replacement (Exchange) of a Central Venous Catheter or Device
CPT provides seven distinct codes to report replacement or exchange of all or part of a central venous access catheter or device. A critical coding distinction applies here: when an existing catheter or device is removed and a new one is placed through a different access site, this is not a “replacement” for coding purposes. Instead, assign a removal code (if appropriate) plus a new placement code — not one of the replacement codes below, which apply only when the exchange occurs through the same existing access site.
Partial Replacement — Catheter Only
36578 — Replacement, catheter only, of central venous access device, with subcutaneous port or pump, central or peripheral insertion site
Assign 36578 when a CVAD that includes a port or pump has already been placed, and only the catheter portion requires replacement while remaining attached to the existing port or pump. This code applies regardless of whether the original device was centrally or peripherally inserted. Do not assign 36578 when replacing a central venous catheter that has no port or pump — that scenario is coded separately below. Because only part of the device is exchanged, this is sometimes referred to as a partial replacement.
Complete Replacement — Centrally Inserted Catheter, No Port or Pump
36580 — Replacement, complete, of a non-tunneled centrally inserted central venous catheter, without subcutaneous port or pump, through same venous access
36581 — Replacement, complete, of a tunneled centrally inserted central venous catheter, without subcutaneous port or pump, through same venous access
Codes 36580 and 36581 apply to complete exchange of a centrally inserted catheter that is not connected to a port or pump. The technique involves inserting a guidewire through the previously placed catheter, removing the old catheter, and placing a new catheter over the guidewire — no new access site is created.
- Assign 36580 when the catheter is non-tunneled.
- Assign 36581 when the catheter is tunneled.
Complete Replacement — Centrally Inserted Device With Port or Pump
36582 — Replacement, complete, of a tunneled centrally inserted central venous access device, with subcutaneous port, through same venous access
36583 — Replacement, complete, of a tunneled centrally inserted central venous access device, with subcutaneous pump, through same venous access
Codes 36582 and 36583 apply when the entire device — both catheter and port/pump — is replaced. The procedure involves placing a guidewire through the existing catheter, reopening the previous incision over the port or pump, removing the port or pump, exchanging the catheter over the guidewire, and placing a new port or pump into the pocket before reconnecting the catheter.
- Assign 36582 when the device includes an implanted port.
- Assign 36583 when the device includes an implanted pump.
Complete Replacement — Peripherally Inserted Catheter (PICC)
36584 — Replacement, complete, of a peripherally inserted central venous catheter (PICC), without subcutaneous port or pump, through same venous access, including all imaging guidance, imaging documentation, and all associated radiological supervision and interpretation required to perform the replacement
36585 — Replacement, complete, of a peripherally inserted central venous access device, with subcutaneous port, through same venous access
PICC replacement performed over a guidewire is coded 36584. This code already includes imaging guidance, so guidance codes must not be separately unbundled and reported alongside it. If this same type of PICC replacement is performed without imaging guidance, the correct code is the unlisted code 37799, not 36584.
When the PICC is attached to a subcutaneous port and the entire device (catheter and port) is exchanged, assign code 36585 instead.
Removal of a Central Venous Catheter or Device
36589 — Removal of tunneled central venous catheter, without subcutaneous port or pump
36590 — Removal of tunneled central venous access device, with subcutaneous port or pump, central or peripheral insertion
When a tunneled central venous catheter or device is removed without being replaced, assign 36589 or 36590. Removal of tunneled catheters and ports requires substantially more physician work than removing a non-tunneled line, and documentation will often reference blunt dissection and/or incision. The term “explant” may also appear in the operative note for these procedures.
Coding rule — non-tunneled catheters: Do not assign 36589 or 36590 for removal of a non-tunneled catheter. If appropriately documented, removal of a non-tunneled catheter may instead be reported as an evaluation and management (E/M) visit.
Coding rule — dual-tunnel devices: When a device with two separately tunneled catheters requires repair, replacement, or removal of both catheters, assign the appropriate code twice.
Coding rule — new access site: If an existing CVAD is removed and a new device is placed via a separate venous access site, assign both a removal code (if the existing catheter was tunneled) and a new placement code.
Guidance for Central Venous Access Procedures
Guidance for CVC/CVAD placement, replacement, or removal may involve both ultrasound and fluoroscopy. Ultrasound is typically used to identify the appropriate vein and guide needle access, while fluoroscopy is used to guide the catheter into its final position. Codes for each guidance modality may be reported when the specific requirements of that code are met. Both guidance codes discussed below are add-on codes and cannot be reported without a primary procedure code.
Ultrasound Guidance — CPT 76937
+76937 — Ultrasound guidance for vascular access requiring ultrasound evaluation of potential access sites, documentation of selected vessel patency, concurrent realtime ultrasound visualization of vascular needle entry, with permanent recording and reporting (List separately in addition to code for primary procedure)
Code 76937 carries a five-part requirement list, and all five elements must be met before this code may be assigned:
- Ultrasound evaluation of potential access sites. This may involve scanning multiple locations — for example, both the left and right jugular veins — to determine which site is most suitable for catheter placement.
- Documentation of vessel patency. The dictated report must specifically document the patency of the vein selected for entry.
- Real-time ultrasound visualization of needle entry. It is not appropriate to assign 76937 if the vessel was simply identified and marked with ultrasound but ultrasound was not actively used to guide the needle into the vessel.
- Documentation of the localization process in the medical record — this is usually included within the central venous catheter placement report itself.
- Permanent recording (images) of the chosen vein. The interpreting physician is not required to explicitly document that permanent images were saved; however, doing so can reduce or eliminate the need to produce those images later if the claim is audited.
Coder tip: While all five requirements must technically be performed, coders should pay particular attention to locating documentation supporting requirements 2, 4, and 5 in the report — language such as patent, narrowed, or tortuous vein, along with confirmation of needle-entry visualization, should be present. Ideally, the report should also note that images were obtained and retained.
Scope note: Code 76937 is not limited to central venous access procedures — it may also be assigned in conjunction with most other vascular access procedures when the same five requirements are met.
Fluoroscopic Guidance — CPT 77001
+77001 — Fluoroscopic guidance for central venous access device placement, replacement (catheter only or complete), or removal (includes fluoroscopic guidance for vascular access and catheter manipulation, any necessary contrast injections through access site or catheter with related venography radiologic supervision and interpretation, and radiographic documentation of final catheter position) (List separately in addition to code for primary procedure)
Code 77001 is a specialized fluoroscopy add-on code used exclusively with central venous access catheter or device procedures. It requires a permanent image documenting the final catheter position.
Key bundling rules for 77001:
- Do not separately code 71045–71048 (chest x-ray) to verify catheter tip positioning — this is bundled into 77001.
- Do not separately bill contrast injections and imaging (venography) performed through the access site or a pre-existing catheter during placement or replacement — these are included in 77001.
- Exception: If a venogram reveals that the catheter must be placed at a different site, the venogram performed at the original, abandoned site may be separately coded.
Example 1 — contrast used at the successful access site (no separate code): The left internal jugular (IJ) vein is accessed and the physician attempts central catheter placement. Difficulty maneuvering the catheter leads the physician to inject contrast for better visualization. Using this contrast-enhanced imaging, the physician successfully advances the catheter to the right atrium. In this scenario, only code 77001 is assigned for the guidance — there is no additional code for the contrast injection and imaging, because it occurred at the same site where the catheter was ultimately and successfully placed.
Example 2 — access site changes (separate coding applies): The physician again accesses the left IJ and injects contrast, but this time determines the catheter cannot be placed from that site. The physician then moves to the right IJ and successfully places the catheter under fluoroscopic guidance. In this case, codes 36000-59 and 75860-59 are assigned for the venogram performed on the abandoned left side, and 77001 is assigned separately for the fluoroscopic guidance used for the successful catheter placement on the right side.
Other Central Venous Access Catheter/Device Maintenance Procedures
Central venous catheters can develop complications requiring diagnostic evaluation or intervention. CPT provides distinct codes for each type of maintenance procedure.
Contrast Injection Evaluation of an Existing Device
36598 — Contrast injection(s) for radiologic evaluation of existing central venous access device, including fluoroscopy, image documentation and report
Assign 36598 for a contrast injection performed through a previously placed CVAD to evaluate its function. This is a complete code that already includes imaging, so no guidance code should be separately assigned alongside it.
Coding rule — unit of billing: Because this code describes injection into a “device,” report it once per encounter per device — not per catheter, lumen, or hub/port.
Coding rule — same-session placement: Do not assign 36598 during the same session as initial placement of the catheter.
Declotting With a Thrombolytic Agent
36593 — Declotting by thrombolytic agent of implanted vascular access device or catheter
When a thrombolytic agent such as tPA is injected into a central venous access device to clear a thrombus, assign 36593.
Coding rule — do not confuse with dialysis declotting codes. Do not confuse 36593 with codes 36904–36906, which are used for declotting a dialysis graft or fistula. When temporary dialysis is performed through a central venous catheter and that catheter requires declotting via thrombolytic injection, the correct code remains 36593, not the 36904–36906 series.
Coding rule — not a thrombolytic infusion. Injection of a thrombolytic agent into a central venous catheter should also not be coded as a thrombolytic infusion. Do not assign codes 37212, 37213, or 37214 for this service.
Mechanical Removal of Pericatheter Obstructive Material (Fibrin Sheath)
36595 — Mechanical removal of pericatheter obstructive material (e.g., fibrin sheath) from central venous device via separate venous access
75901 — Mechanical removal of pericatheter obstructive material (e.g., fibrin sheath) from central venous device via separate venous access, radiologic supervision and interpretation
When a foreign object such as a catheter is implanted, the body naturally forms a protective fibrin sheath around it. While fibrin forming on the outside of the catheter is usually not problematic, fibrin forming over the catheter tip can cause an obstruction.
Snare technique: One method for removing a fibrin sheath involves gaining venous access at a site separate from the central venous catheter’s own access site, maneuvering a specialized catheter through the venous system to the central line, opening a snare at the tip of that catheter, positioning the snare around the end of the central venous catheter, and tightening and pulling it down to strip the fibrin sheath off the catheter. Assign 36595 and 75901 for this procedure when performed via a separate access.
Additional catheterization coding: Because this procedure requires a separate venous access and catheterization, an appropriate venous catheterization code (36010, 36011, or 36012) may also be assigned along with 36595 and 75901. Code selection depends on the access site (where catheterization began) and the final catheter location (where it ended).
Coding rule — same-access balloon technique. For removal of a fibrin sheath using a balloon catheter via the same access as the central venous access device (rather than a separate access), use the unlisted code 37799. Codes 36595 and 75901 apply only when the fibrin sheath is disrupted via a separate access from the CVC.
Coding rule — bundled contrast/imaging. Contrast injections and imaging are included in 36595/75901 — do not additionally assign 36598.
Mechanical Removal of Intraluminal Obstructive Material
36596 — Mechanical removal of intraluminal (intracatheter) obstructive material from central venous device through device lumen
75902 — Mechanical removal of intraluminal (intracatheter) obstructive material from central venous device through device lumen, radiologic supervision and interpretation
When thrombus is located inside the catheter and is removed through the catheter itself, assign codes 36596 and 75902. This procedure may involve using a wire to break up the thrombus for aspiration, or a brush to scrape and remove thrombotic material from inside the catheter lumen.
Coding rule — bundled contrast/imaging. As with 36595/75901, contrast injections and imaging are already included in 36596/75902 — do not additionally assign 36598.
Repositioning of a Central Venous Catheter
36597 — Repositioning of previously placed central venous catheter under fluoroscopic guidance
76000 — Fluoroscopy (separate procedure), up to 1 hour physician or other qualified health care professional time
When an existing central venous catheter requires repositioning, assign both 36597 and 76000. Although the descriptor for 36597 references “under fluoroscopic guidance,” the guidance itself is not included in the code. A parenthetical note in the CPT manual specifically instructs coders to separately report 76000 for this guidance.
Coding rule — timing restriction. Code 36597 cannot be assigned during the same session as the initial placement or a replacement of the catheter — it applies only to repositioning a catheter that was already placed in a prior encounter.
Miscellaneous Venous Catheterization Procedures
Selective Organ Venous Sampling
36500 — Venous catheterization for selective organ blood sampling
75893 — Venous sampling through catheter, with or without angiography (e.g., for parathyroid hormone, renin), radiological supervision and interpretation
Assign 36500 and 75893 when venous access is obtained and a catheter is maneuvered into a vein draining a specific organ — such as the kidney — in order to collect a blood sample from that organ’s venous outflow. This procedure is most commonly performed for a renal vein renin study, but may also be used to evaluate adrenal or other organ-specific disease processes.
Coding rule — per organ, not per sample. Assign 36500 and 75893 once for each organ sampled, but not for multiple samples drawn from the same single organ.
Coding rule — selective sampling only. Do not assign 36500 and 75893 for non-selective samples drawn from the IVC or SVC.
Coding rule — no additional catheterization codes. Do not additionally report other catheterization codes alongside 36500 and 75893.
Best Practices for Coding CVC Repair, Replacement, Removal, and Guidance
- Determine whether a port/pump is involved before choosing between the repair codes (36575 vs. 36576) or the replacement codes.
- Confirm whether the exchange occurred through the same access site. A different access site means removal + new placement, not a replacement code.
- Determine whether the replacement is partial (catheter only) or complete (entire device) before selecting from the seven replacement codes.
- Verify tunneled vs. non-tunneled status before assigning removal codes — 36589/36590 apply only to tunneled devices.
- Check all five requirements for 76937 before assigning ultrasound guidance, and confirm documentation of patency, localization, and permanent imaging.
- Never unbundle imaging or venography from 77001, except when a venogram at an abandoned access site justifies separate coding.
- Distinguish declotting (36593) from dialysis access declotting (36904-36906) and from thrombolytic infusion codes (37212-37214).
- Confirm separate vs. same access before choosing between 36595/75901 (separate access, snare) and unlisted code 37799 (same access, balloon technique).
- Always add 76000 with 36597 for catheter repositioning, since fluoroscopic guidance is not bundled into that code despite its descriptor.
- Reserve 36500/75893 for selective, per-organ sampling only — never for non-selective IVC/SVC sampling.
Conclusion
The full lifecycle of a central venous access device — from repair and replacement through removal, guidance, and troubleshooting — is governed by a dense set of interconnected CPT rules. Coders must consistently evaluate access site continuity, tunneling status, port/pump presence, and guidance modality documentation before finalizing code selection. Mastering these bundling rules and coding distinctions is essential to accurate reimbursement and reduces the risk of both underbilling and audit-triggering overbilling.
This guide is intended for educational purposes for medical coding professionals. Always reference the current-year CPT codebook, NCCI edits, and applicable payer policies before final code assignment.
