Questions: Every ICD-10-CM code begins with a(n) Answer Answer are broad sections of the ICD-10-CM coding manual grouped by disease and injuries. The Answer lists diagnostic terms and related codes in alphabetical order by main terms.

The answer is "alphabetic letter."

Explanation for each option:

1. Chapters: Incorrect. Chapters in the ICD-10-CM coding manual are broad sections grouped by diseases and injuries, but they do not begin the codes. They organize the codes into categories.

2. Number: Incorrect. ICD-10-CM codes do not begin with a number. They start with an alphabetic letter followed by numbers.

3. Tabular List: Incorrect. The Tabular List is a section of the ICD-10-CM manual that organizes codes in a numerical order, but it is not what begins each code.

4. Alphabetic letter: Correct. Every ICD-10-CM code begins with an alphabetic letter, which indicates the chapter of the code.

5. Alphabetic Index: Incorrect. The Alphabetic Index lists diagnostic terms and related codes in alphabetical order by main terms, but it is not what begins each code.