M65.31
Trigger thumb
Clinical Information
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Localized swelling of the flexor pollicis longus muscle tendon that limits excursion within the tendon sheath and causes the tendon to be caught under the flexor tendon sheath, which typically causes a snap, pop or click when it releases with pressure.
Details
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M65.31 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
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The 2023 edition of ICD-10-CM M65.31 became effective on October 1, 2022.
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This is the American ICD-10-CM version of M65.31 – other international versions of ICD-10 M65.31 may differ.