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Z55 Problems related to education and literacy

ICD-10-CM category Z55 sits in Chapter 21 (Factors influencing health status and contact with health services, Z00-Z99). It contains 9 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in Z55

CodeDescription
Z55.0Illiteracy and low-level literacy
Z55.1Schooling unavailable and unattainable
Z55.2Failed school examinations
Z55.3Underachievement in school
Z55.4Educational maladjustment and discord with teachers and classmates
Z55.5Less than a high school diploma
Z55.6Problems related to health literacy
Z55.8Other problems related to education and literacy
Z55.9Problems related to education and literacy, unspecified

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