Z Codes
By Valerie Fernandez, MBA, CPC, CPC-H, AHIMA ICD-10 Trainer

ICD-10-CM Z codes (categories Z00 – Z99) are used to report factors influencing health status and contact with health services. They are found in Chapter XXI in the ICD-10 book and may be used in any healthcare setting. They can be reported as a principal diagnosis in an inpatient setting, and may be listed either as a primary or secondary diagnosis in an outpatient setting, based on the type of encounter.

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