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Modifier 54

Definition

Modifier 54 is used when a surgeon performs only the intraoperative (surgical) portion of a procedure that has a global surgical package including pre-operative, intraoperative, and post-operative care. The surgeon does not perform pre- or post-operative evaluation/management. Another provider typically handles pre-op and post-op phases. Modifier 54 indicates the surgeon is responsible only for the surgery itself.

When to Use

  1. Surgeon performs knee arthroscopy (29881-54); primary care physician provides pre-op clearance and post-op follow-up
  2. Visiting surgeon performs cataract surgery (66984-54); local ophthalmologist manages pre-op and post-op care
  3. Surgeon performs total hip replacement (27130-54); patient returns to primary surgeon for post-op care
  4. Locum surgeon performs appendectomy (44960-54); hospital-based surgeon manages pre- and post-operative

Documentation Requirements

Clarify in operative note and billing that only intraoperative service is being billed. Ensure other provider(s) document pre-op and post-op care separately. Do not duplicate care between surgeons. Clearly define transition points: when other surgeon takes over pre-op and when post-op begins. Ensure no overlap in responsibility. Operative report should suffice for 54; no separate post-op notes from operating surgeon.

Payer-Specific Rules

Payer Acceptance Common Denials Notes
Medicare Accepted; split global fee CO-20: Charge exceeds fee schedule Pay only intraoperative RVU portion (typically 45-50% of global). Require documentation.
Aetna Accepted; coordinate with other providers CO-4: Service bundled Will pay reduced intraoperative amount. Require other provider documentation.
United Healthcare Accepted; requires coordination CO-56: Inaccurate/incomplete information Pay surgical portion. Deny if pre/post-op also billed from same surgeon.
Cigna Accepted with coordination CO-20: Charge exceeds fee schedule Will pay surgical portion. Require evidence other provider manages pre/post-op.
Humana Accepted; standard split CO-54: Surgical care included in another Pay intraoperative RVU only. Deny if overlap with other provider billing.
  • 55 – Post-operative care only. Use if provider performs only post-operative phase.
  • 56 – Pre-operative care only. Use if provider performs only pre-operative evaluation.
  • 80 – Assistant surgeon. Use if assistant surgeon assists with operative portion.

Common Denials

CARC Code Reason Primary Cause
CO-20 Charge exceeds fee schedule Billed full global fee; must bill reduced surgical-only fee.
CO-4 Service bundled Another provider already billed same procedure code; cannot also bill 54.
CO-56 Incomplete information Cannot determine who performed pre- and post-operative care.

FAQ

Can the same surgeon bill 54 and 55?

No. One surgeon should perform the complete global package or split it with other provider(s). Same surgeon cannot split own care.

What RVU percentage do I get for modifier 54?

Medicare typically 45-50% of global RVU (intraoperative portion). Varies by code and payer.

Does the other provider bill the pre- and post-op separately?

Yes. If surgeon A bills 54 (intraop), surgeon B should bill 56 (pre-op) and 55 (post-op), or other appropriate split.

Prevent These Denials

Prevent surgical care split billing errors. Use a co-pilot to coordinate provider documentation.

Related Resources

This reference is current as of 2026-03-23. Payer policies change. Always verify against the payer's latest policy documentation.
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