In ICD-10 coding, what is true about the second character?

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Multiple Choice

In ICD-10 coding, what is true about the second character?

Explanation:
In ICD-10 coding, the second character is always numeric. The code structure starts with a letter in the first position to identify the broad chapter, and the second position uses a digit (0–9) to narrow the category. After those first two characters, the remaining positions may include digits or letters depending on the specific code, but the second character never is a letter. This is why the statement that the second character will always be numeric is the correct one. The options suggesting it’s alphabetic, alphanumeric, or sometimes numeric don’t fit the fixed rule for that position.

In ICD-10 coding, the second character is always numeric. The code structure starts with a letter in the first position to identify the broad chapter, and the second position uses a digit (0–9) to narrow the category. After those first two characters, the remaining positions may include digits or letters depending on the specific code, but the second character never is a letter. This is why the statement that the second character will always be numeric is the correct one. The options suggesting it’s alphabetic, alphanumeric, or sometimes numeric don’t fit the fixed rule for that position.

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