H49.1
Fourth [trochlear] nerve palsy
Details
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H49.1 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 H49.1 became effective on October 1, 2022.
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This is the American ICD-10-CM version of H49.1 – other international versions of ICD-10 H49.1 may differ.