Z Codes and External Causes Flashcards

Z codes in ICD-10-CM (Z00-Z99) are primarily used to:

Answer: Identify factors influencing health status and contact with health services

Z codes capture reasons for encounters when no disease or injury is present, such as preventive care, screenings, and health status factors.

Which Z code is assigned for a patient presenting for a routine general adult medical examination with no abnormal findings?

Answer: Z00.00

Z00.00 is 'Encounter for general adult medical examination without abnormal findings,' used for routine annual physicals with no issues discovered.

A patient previously treated for breast cancer (now resolved) presents for follow-up monitoring. Which Z code category applies?

Answer: Z85 – Personal history of malignant neoplasm

Z85 codes document personal history of a condition that no longer exists but may affect current or future care planning.

Family history Z codes in ICD-10-CM are found in which code range?

Answer: Z80-Z84

Z80-Z84 capture family history of conditions such as malignant neoplasms, mental disorders, and cardiovascular disease.

A patient presents specifically to receive a flu vaccination. The correct Z code for this encounter is:

Answer: Z23

Z23 is 'Encounter for immunization,' the specific code assigned when a patient comes in solely to receive a vaccine.

Which of the following is an example of a long-term (current) drug therapy status Z code?

Answer: Z79.01 – Long-term (current) use of anticoagulants

Z79 codes indicate the patient is currently receiving ongoing medication therapy, which may affect treatment decisions and drug interactions.

Z codes for contact with and exposure to communicable diseases are found in which ICD-10-CM category?

Answer: Z20

Category Z20 'Contact with and (suspected) exposure to communicable diseases' is used when a patient has been potentially exposed to an infectious disease without confirmed infection.