Which immunization encounter code is used for documenting an encounter for immunization?

The code Z23 is specifically designated in the ICD-10-CM coding system for encounters involving immunization. It indicates a "Encounter for immunization" and is used to document the occasion when a patient receives a vaccination, ensuring proper coding for preventive care services.

Use of this code helps healthcare providers record and track vaccinations, which is essential for maintaining comprehensive patient records and ensuring preventive measures are taken against various diseases. This code plays a crucial role particularly in demonstrating compliance with immunization schedules, which are critical for public health.

The other options do not pertain to immunization encounters: P23 is not a valid option in the ICD-10 coding system; Z012 typically refers to an "Encounter for general examination," and Z32 is used for "Encounter for pregnancy tests." Thus, Z23 is the appropriate choice for accurately capturing the immunization encounter.