Unspecified atrial flutter

This code signifies an abnormal heart rhythm originating in the atria, characterized by rapid, regular atrial contractions, where the specific type or pattern of atrial flutter (e.g., typical, atypical) has not been documented by the provider. It indicates the presence of atrial flutter without further specification.

Assign this code when the medical record clearly states "atrial flutter" but lacks any further detail regarding its specific type. This is appropriate when the physician's documentation does not specify whether the flutter is typical (Type I) or atypical (Type II), or if the specific mechanism is unknown.

• Avoid using this code if the documentation specifies "typical atrial flutter" or "atypical atrial flutter"; more specific codes are available.
• Query the provider for clarification if "atrial flutter" is documented without further specificity, especially if treatment or prognosis differs based on the type.
• This code is often a principal diagnosis but may also be a secondary diagnosis if another condition is the primary reason for the encounter.