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Release Flexor Hallucis Longus CPT: Coding, Guidelines, and Clinical Applications

"The primary CPT code for a release or tenolysis of the flexor hallucis longus (FHL) tendon in the foot is 28220, which describes the surgical liberation of a single flexor tendon from adhesions or constrictive sheaths. For procedures involving multiple tendons, code 28222 is used, while releases performed at the level of the ankle or leg may require codes from the 27646 series. Effective coding for flexor hallucis longus (FHL) procedures in 2026 requires a precise understanding of the anatomical site of the release, the surgical approach used, and the underlying pathology. The FHL tendon plays a critical role in the biomechanics of the first..."

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