The Alphabetic Index consist of a list of diseases and injuries and their related ICD-10 diagnosis code(s). The diagnosis codes found in the Tabular List and Alphabetic Index have been adopted under HIPAA for all healthcare settings.
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Search for ”Lesch-Nyhan syndrome“
Find the disease or condition using the Alphabetic Index displayed on this page. Select the associated ICD-10 code to view any special notations from the Tabular List.
In addition to the notes in the Tabular List, these conditions also have a specific Alphabetic Index entry structure. In the Alphabetic Index both conditions are listed together with the etiology code first followed by the manifestation codes in brackets. The code in brackets is always to be sequenced second.
NEC “Not elsewhere classifiable”
This abbreviation in the Alphabetic Index represents “other specified.” When a specific code is not available for a condition, the Alphabetic Index directs the coder to the “other specified” code in the Tabular List.
NOS “Not otherwise specified”
This abbreviation is the equivalent of unspecified.