CPT® Code 64905

Quick Reference

• Code definition: CPT 64905 reports the first stage of a nerve pedicle transfer, in which a vascularized donor nerve (with intact blood supply and motor endplate) is mobilized, tunneled, and secured to a recipient nerve site to establish a pathway for axonal regeneration.
• Key billing rule: This code carries a 90-day global period (Major Surgery). Stage 2 (64907), when performed within that window, requires modifier 58 or the claim will deny as a global period violation.
• Modifier essentials: Modifier 58 for Stage 2 billing in the global period; modifier 51 when combined with other same-session procedures; modifier 62 for co-surgeon arrangements (supported with documentation); modifiers LT/RT for laterality. Modifier 50 does NOT produce the 150% bilateral adjustment for this code.
• Documentation must-have: The operative report must explicitly identify the donor and recipient nerves by name and anatomic location, describe preservation of the feeding vessels (confirming true pedicle technique), and detail the tunneling method and fixation at the recipient site.
• Top confusion point: Using 64905 when a standard nerve graft was performed. A pedicle transfer requires vascular supply preservation throughout the procedure; if the donor nerve is harvested without maintaining its blood supply, the correct codes are in the nerve graft family (64885 through 64902).
• Payer alert: No CMS National Coverage Determination exists for 64905; coverage is MAC-determined via Local Coverage Determinations. ASC billing is supported (code added to ASC list in CY2007). Co-surgeons may be reimbursed with supporting documentation (indicator 1).
• MUE: 1 per date of service. Team surgery (modifier 66) is not permitted for this code (indicator 0).

When to Use This Code

Clinical Indications

CPT 64905 applies when a surgeon performs the first stage of a nerve pedicle transfer: mobilizing a donor nerve along with its intact vascular pedicle and motor endplate, creating a subcutaneous or subfascial tunnel, and routing and securing the pedicle at the recipient nerve site. The procedure is chosen over direct repair or cable grafting when the nerve gap is too large for primary coaptation, when tissue vascularity at the repair zone is compromised, or when a high-level nerve injury with long-segment loss makes free grafting unreliable.

Common clinical contexts include brachial plexus injuries (particularly C5-C6 avulsion patterns), high-level injuries to the radial, ulnar, or median nerve, facial nerve reconstruction, and complex limb-salvage scenarios. The procedure is inherently staged; the surgeon does not complete final nerve coaptation at the recipient end during Stage 1. Final coaptation and severance of the pedicle at the donor origin occur at Stage 2, after axonal regeneration is confirmed.

Scope Boundaries

Stage 1 is defined by three elements: pedicle creation (donor nerve dissected with feeding vessels intact), tunneling (pathway created between donor and recipient sites), and fixation (pedicle secured at recipient site with sutures). If any of these elements is absent from the operative report, the code selection requires reassessment. Wound closure, hemostasis, and dressing application are included in the global surgical package and are not separately reportable.

64905 does not apply when a nerve is harvested without preserving its blood supply (that is nerve grafting), when neurolysis alone is performed (64702 through 64727), or when a primary nerve repair via suture technique is documented (64831 through 64876).

Setting Considerations

64905 is payable in both the facility and non-facility settings, though this is a major surgical procedure performed in an operating room. It is on the ASC covered procedure list (CY2007, based on OPPS relative payment weight) [1]. Hospital outpatient claims are paid through a comprehensive APC [1]. The code is classified as a physician service code (PC/TC indicator 0), meaning no separate technical component exists.

Code Differentiation Table

The critical differentiator between 64905 and the nerve graft family is vascular supply. A nerve pedicle transfer maintains continuity between the donor nerve and its blood supply throughout the procedure; the nerve is never fully detached from its feeding vessels until Stage 2. If the operative report describes harvesting and reimplanting a nerve segment without maintaining feeding vessel continuity, that is nerve grafting, not a pedicle transfer, and the graft codes apply regardless of the complexity of the repair.

flowchart TD
    A[Peripheral nerve reconstruction required] --> B{Is the donor nerve kept\nattached to its blood supply\nthroughout the procedure?}
    B -- Yes --> C{Is this the initial operative\nsession establishing the pedicle?}
    B -- No --> D[Nerve graft family\n64885–64902 or 64912–64913]
    C -- Yes --> E[CPT 64905\nNerve pedicle transfer, first stage]
    C -- No --> F{Is axonal regeneration\nconfirmed and pedicle\nbeing severed at donor origin?}
    F -- Yes --> G[CPT 64907\nNerve pedicle transfer, second stage]
    F -- No --> H[Review clinical documentation\nbefore code assignment]

Billing and Modifier Rules

Global Period and Staged Procedure Billing

CPT 64905 carries a 90-day global period (Major Surgery, confirmed in CMS data) [1]. All routine follow-up care within that window is bundled. When the same surgeon performs Stage 2 (64907) within the 90-day global period of 64905, modifier 58 is required to indicate a planned staged procedure. Modifier 58 resets the global period for 64907 [2]. The two codes must never appear on the same date of service; they represent separate operative encounters.

Modifier Applications

Team surgery (modifier 66) is not permitted for this procedure (indicator 0) [1].

Add-On Codes

69990 (microsurgical techniques requiring operating microscope) may be reported separately when an operating microscope is used and is not otherwise bundled per CPT parenthetical instructions. Verify current CPT instructions and NCCI edits before billing 69990 with 64905, as some nerve repair codes have explicit exclusion notes.

0882T (intraoperative therapeutic electrical stimulation of peripheral nerve to promote regeneration, upper extremity, add-on) may be reported in addition to 64905 when performed during the same session. CPT parenthetical instructions from the 0882T code confirm that 64905 is an eligible primary code for this add-on [1].

MUE and Bundling

MUE is 1 for 64905 per CMS data [2]. Only one unit per date of service is expected. Wound closure is included in the global surgical package. Neurolysis codes (64702 through 64727) performed at the same nerve on the same date may be bundled via NCCI PTP edits; verify the current quarterly tables for specific column 1/column 2 pairs before billing both [2].

Documentation Essentials

Required Elements

The operative report for 64905 must establish that a true vascularized pedicle was created, not a free graft. At minimum, document:

• Specific identification of the injured nerve (name, anatomic level, laterality)
• Specific identification of the donor nerve (name, anatomic level) and confirmation that feeding vessels were preserved throughout dissection
• Length of nerve and pedicle mobilized
• Method of tunnel creation (subcutaneous, subfascial, submuscular) and the tunnel path from donor to recipient site
• Method of fixation at the recipient site (suture material, technique)
• Surgical plan or notation that this represents Stage 1 of a staged reconstruction

Pre-operative documentation supporting medical necessity should include neurologic examination findings (motor and sensory deficits), EMG or nerve conduction study results establishing severity and chronicity, and documentation that simpler repair options (direct neurorrhaphy, cable grafting) were considered and why they were not appropriate.

Audit Red Flags

Auditors reviewing 64905 claims focus on whether the operative report supports the pedicle technique specifically. Claims drawing scrutiny include:

• Operative notes that describe nerve harvest and reimplantation without explicit mention of vascular pedicle preservation, which read more like nerve grafting
• Multiple staged claims without supporting inter-stage documentation (no EMG or clinical progress notes between Stage 1 and Stage 2)
• Modifier 58 absent when Stage 2 is billed within 90 days of Stage 1 by the same surgeon
• Modifier 22 added without explicit narrative in the operative note describing the additional time, complexity, or difficulty beyond the typical case
• 69990 billed without documentation confirming the operating microscope was required and used

Medical Necessity

No CMS National Coverage Determination applies to CPT 64905 [3]. Coverage determinations are MAC-specific via LCDs. When billing Medicare, search the CMS Medicare Coverage Database for the applicable MAC's LCD governing peripheral nerve reconstruction. Document the clinical rationale for choosing pedicle transfer over nerve grafting or allograft repair in the pre-operative assessment or operative note.

Medicare, Commercial and Medicaid Payer Rules

Medicare

CPT 64905 is an active code with no dedicated NCD; MAC-level LCD coverage applies [3]. The 90-day global period is confirmed, and staged procedure billing rules under CMS Claims Processing Manual Chapter 12 govern the modifier 58 requirement for Stage 2 [2]. The code is payable in the ASC setting (added CY2007, reimbursed based on OPPS relative payment weight) [1]. Hospital Part B claims are paid through a comprehensive APC. MUE of 1 per date of service is published in CMS data [2]. Medicare does not require prior authorization for most surgical procedures.

The CY2025 and CY2026 Medicare Physician Fee Schedule Final Rules should be reviewed for any RVU or status indicator changes. No specific revisions to 64905 were identified in the 2024 or 2025 CPT cycle, and the code has been active since pre-1990 [1]. CPT 0882T was added as a new code in 2024 and is listed as a valid add-on for use with 64905 [1].

Commercial Payers

Prior authorization is commonly required by commercial payers for major reconstructive nerve surgery. Obtain authorization before scheduling and ensure the pedicle transfer technique (as distinguished from nerve grafting) is clearly described in the authorization request. Commercial policies may apply diagnosis-driven restrictions. Verify payer-specific policies before billing 69990 as an add-on, as some payers apply more restrictive bundling rules than NCCI.

Common Denials and Prevention

Global period violation (Stage 2 denied) Stage 2 (64907) billed within the 90-day global of 64905 without modifier 58 will deny as a global period service included in the prior surgery. The claim presents as a duplicate or as a service covered by the global package. Append modifier 58 to 64907 and confirm the claim includes the Stage 1 date of service in the claim notes or supporting documentation. Modifier 58 resets the global period for Stage 2 [2].

Insufficient documentation for pedicle technique Claims where the operative report describes nerve harvest without vascular pedicle preservation language will be downcoded to a nerve graft code (64892 through 64898) on audit or medical review. Prevention requires the operative note to explicitly describe the feeding vessel dissection and confirm continuity was maintained until the pedicle was secured at the recipient site.

Unbundled add-on codes denied 69990 or 0882T denied because the primary code was not billed, or because NCCI PTP edits bundle them in the specific clinical context. Confirm the primary code (64905) is present and payable before billing add-ons, and verify current NCCI tables quarterly for 69990 edit status with 64905 [2].

Modifier 22 denial without documentation support Modifier 22 appended to 64905 without explicit narrative in the operative note describing the extraordinary complexity. Payers require the note to state what made the case harder than typical (prior surgery, scarring, variant anatomy, extended time) with supporting specifics. Generic statements are insufficient; time comparisons or complexity descriptions with objective findings support the claim.

Bilateral adjustment incorrectly applied Billing modifier 50 expecting the 150% bilateral payment adjustment will not apply because the bilateral surgery indicator is 0 for this code [1]. Use LT and RT modifiers for laterality identification only. Expect standard single-procedure reimbursement for each side when bilateral surgery is performed and document separate operative sessions or contemporaneous bilateral technique with explicit rationale.

Coding Scenarios

Scenario 1: Stage 1, Brachial Plexus Injury A 32-year-old male sustains a C5-C6 brachial plexus avulsion. Pre-operative EMG confirms complete denervation of the deltoid and biceps with no voluntary motor units. The surgeon determines the gap is too large for direct repair; a vascularized nerve pedicle using a nearby motor branch is dissected with its feeding vessels intact, tunneled subcutaneously, and sutured to the recipient site. The donor nerve is not severed at its origin.

Correct coding: 64905 with LT modifier

Why: The operative report documents vascular pedicle preservation and tunneling, confirming Stage 1 pedicle transfer technique rather than free nerve grafting. Stage 2 will be scheduled after clinical and electrodiagnostic evidence of axonal regeneration.

Scenario 2: Stage 2 Within the Global Period Six weeks after Stage 1 (64905), the same surgeon performs Stage 2. Nerve conduction studies performed 4 weeks post-Stage 1 show nascent motor unit potentials in the target muscle. The surgeon returns to the OR and severs the nerve pedicle at its donor origin (64907).

Correct coding: 64907-58 with LT modifier

Why: Stage 2 falls within the 90-day global period of 64905. Modifier 58 is required to indicate a planned staged procedure and to reset the global period for 64907. Supporting documentation should include the inter-stage EMG results confirming axonal regeneration [2].

Scenario 3: Co-Surgeons A complex brachial plexus case requires two surgeons working simultaneously: one performing the donor nerve pedicle dissection and harvest, the other preparing the recipient target muscle and nerve site. Both surgeons are present throughout.

Correct coding: 64905-62 (both surgeons bill 64905-62)

Why: Database indicator 1 confirms co-surgeons may be paid with supporting documentation [1]. Each surgeon submits a separate operative note documenting their distinct role. Payer prior authorization and op note requirements for co-surgeon arrangements apply.

Scenario 4: Stage 1 with Concomitant Cable Graft at Separate Site During the same operative session as Stage 1 pedicle transfer, the surgeon also performs a cable nerve graft at a separate nerve injury site in the same arm, requiring more than 4 cm of graft material.

Correct coding: 64905 + 64898-51

Why: The nerve graft at the second site is a distinct procedure performed on a separate nerve. Modifier 51 on 64898 signals multiple procedures in the same session; the standard payment adjustment reduction applies per database indicator 2 [1]. The operative report must document that 64905 and 64898 address separate nerves at separate anatomic sites.

Related Codes

• 64907 — Nerve pedicle transfer; second stage. Stage 2 of the same procedure, billed at a separate session after axonal regeneration is confirmed.
• 64885 — Nerve graft, head or neck; up to 4 cm. Free graft alternative without vascular pedicle.
• 64892 — Nerve graft, single strand, arm or leg; up to 4 cm. Most common free graft alternative for upper extremity nerve repair.
• 64897 — Nerve graft, multiple strands (cable), arm or leg; up to 4 cm. Cable graft alternative for larger gap reconstruction.
• 64912 — Nerve repair with nerve allograft, each nerve, first strand. Processed allograft alternative when autologous donor nerve is not used.
• 69990 — Microsurgical techniques, operating microscope (add-on). Reported separately when microscope is required and not bundled.
• 0882T — Intraoperative therapeutic electrical stimulation of peripheral nerve to promote regeneration, upper extremity; initial nerve (add-on). CPT parenthetical instructions confirm eligibility with 64905.

Sources

1. CMS Physician Fee Schedule and ASC Payment Data — CMS Physician Fee Schedule Lookup Tool. Updated annually. Confirms global days (090), MUE (1), bilateral indicator (0), co-surgeon indicator (1), team surgery indicator (0), ASC eligibility (CY2007), and APC status indicator for CPT 64905.
2. CMS NCCI Edits and Claims Processing Manual — CMS NCCI Edits Downloads; CMS Claims Processing Manual, Chapter 12. Updated quarterly (NCCI) and ongoing (Ch. 12). Governs MUE values, PTP edit pairs, global surgery policy, and modifier 58 requirements for staged procedures.
3. CMS Medicare Coverage Database — CMS Medicare Coverage Database. Updated continuously. No dedicated NCD identified for CPT 64905; coverage is MAC-determined via LCD.