Coding Tip: “Code First” Instructional Notes in ICD-10-CM

There are certain conditions that have instructional notes in the ICD-10-CM tabular/coding conventions that guide the coder in sequencing. This is especially true when the condition has a common manifestation or underlying conditions of a chronic disease. If there is a “code first” note in the tabular, the coder should follow this instruction and sequence the underlying etiology or chronic condition first followed by the manifestation as an additional diagnosis.

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