Novice inpatient coders: Review ICD-10-CM/PCS basics for your new role

Why This Topic Matters

Understanding the basic structure of ICD-10-CM and ICD-10-PCS is essential for accurate inpatient documentation review, coding workflow, and communication with clinical staff. The article helps readers orient themselves to how these code sets are organized and what kinds of information they are designed to capture.

Article Sections

1. ICD-10-CM character definitions

   Introduces the general structure of ICD-10-CM diagnosis codes and broad concepts related to character placement and specificity. It also notes related guideline areas that readers may need to consult for broader coding context.

2. Identifying seventh character extension

   Explains the role of the seventh character in ICD-10-CM and discusses common situations where extension characters are relevant. The section also covers general considerations for locating and using the seventh position.

3. Placeholder use

   Describes the general purpose of placeholder characters in ICD-10-CM when code length and character position need to be aligned. It also discusses how character placement affects code structure.

4. Procedural coding system definitions

   Provides an overview of ICD-10-PCS as the inpatient procedural code set and describes its broad design features. The section highlights the relationship between documentation, procedure intent, and procedural classification.

5. Building an ICD-10-PCS code

   Outlines the seven-character framework used to construct ICD-10-PCS codes and describes the general role of each character. It also covers how the code set is organized into tables and how those tables support code assignment.