2025 ICD-10-CM code Z23

Encounter for immunization. Note: Procedure codes are required to identify the types of immunizations given. Consider also Z71.85, Encounter for immunization safety counseling, if applicable.

Z23 should not be used as a primary diagnosis.It should be used in conjunction with procedure codes for the specific immunization(s) administered. If a procedure is not performed, use codes from category Z71, Person encountering health services for other counseling and medical advice, not elsewhere classified.

Medical necessity for the administration of immunizations is generally established by guidelines from the Centers for Disease Control and Prevention (CDC) and the Advisory Committee on Immunization Practices (ACIP).Documentation should support the adherence to these guidelines.

The clinician is responsible for documenting the specific immunization(s) administered using appropriate procedure codes, and for counseling the patient on immunization safety, if applicable (coded as Z71.85).

IMPORTANT If immunization safety counseling is provided, use Z71.85 in addition to Z23. Procedure codes are required to identify the specific immunization(s) given.

In simple words: This code indicates a visit to a healthcare provider for the purpose of getting a vaccination.The specific vaccine received will be indicated by a separate procedure code.

This code is used for encounters with health services for the purpose of receiving an immunization.A procedure code must accompany this code to specify the type of immunization given.If counseling for immunization safety occurs, Z71.85 should be used as an additional code.

Example 1: A 2-month-old infant presents to their pediatrician's office for their routine vaccinations. The pediatrician administers the DTaP, IPV, Hib, PCV13, and RV vaccines. The encounter is coded as Z23, along with the procedure codes for each vaccine., A 16-year-old patient visits their doctor to receive the HPV vaccine. The encounter is coded as Z23, along with the procedure code for the HPV vaccine., A 65-year-old patient presents to the pharmacy for an influenza vaccine. The encounter is coded as Z23 along with the procedure code for the influenza vaccine.

Documentation should include the date of the encounter, the type and dose of each immunization administered (using procedure codes), the site of administration, and any adverse reactions, if applicable. If immunization safety counseling was provided, this should also be documented.

  • Specialties:Pediatrics, Family Medicine, Internal Medicine, General Practice, Public Health
  • Place of Service:Office, Inpatient Hospital, Outpatient Hospital, Pharmacy, Public Health Clinic
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