27420 Revision of unstable kneecap
Also known as: patellar realignment, patellar revision, medial reefing
Surgical revision of unstable patella (kneecap) through medial reefing, lateral release, patellar realignment, or soft tissue balancing to restore normal tracking and stability.
In Plain Language
fixing a loose or misaligned kneecap; kneecap realignment
Clinical Context
Used for chronic patellar instability, lateral patellar tracking, recurrent patellar dislocation, and patellofemoral pain. Common in young patients.
RVU Breakdown
| Work RVU | 10.00 |
| Total RVU | 10.00 |
Est. Medicare Payment
National estimate based on 2026 CMS PFS Conversion Factor ($33.40). Actual payment varies by locality (GPCI adjustment).
Billing & Documentation
As a surgical CPT code, proper documentation must include the operative report detailing the procedure performed, patient positioning, approach, findings, and any complications. This code has a 90-day global period, which includes the day of the procedure, 1 day preoperative, and 90 days of postoperative care. Ensure the diagnosis code (ICD-10) supports medical necessity for the procedure.
How This Code Compares
With a work RVU of 10.00, this code ranks in the 59th percentile among Surgery codes — 1.3x the median (8.00). The highest wRVU in this category is 106.19.
Specialties
Frequently Asked Questions
What is CPT code 27420?
CPT 27420 (Revision of unstable kneecap) is a Surgery code. Surgical revision of unstable patella (kneecap) through medial reefing, lateral release, patellar realignment, or soft tissue balancing to restore normal tracking and stability.
What is the wRVU value for CPT 27420?
The work RVU for CPT 27420 is 10.00. This code is primarily used by Orthopedic Surgery, Sports Medicine, Knee Surgery. It has a 90-day global period.
When is CPT 27420 used?
Used for chronic patellar instability, lateral patellar tracking, recurrent patellar dislocation, and patellofemoral pain. Common in young patients.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.