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27447 CPT Code: Total Knee Arthroplasty (TKA) Rules

Last Updated: December 9, 2025

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CPT 27447 represents Arthroplasty, knee, condyle and plateau; medical and lateral compartments with or without patella resurfacing (Total Knee Replacement).

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The 90-Day Global Period

27447 is a major surgery with a 90-day global period. This means all routine post-operative care, suture removal, and standard follow-up visits for the next three months are bundled into the surgical payment. Do not bill E/M codes for these visits without Modifier 24 (and only if unrelated).

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Inpatient-Only List Changes

CMS recently removed 27447 from the Inpatient-Only (IPO) list, meaning it can now be performed in Hospital Outpatient Departments (HOPD) or Ambulatory Surgical Centers (ASC). Ensure your Place of Service (POS) aligns with the patient's admission status.

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NCCI Edits

Virtually all other knee procedures (meniscectomies, loose body removals, scopes) performed on the same knee during the same session are bundled into the total joint replacement.

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