Z55: Problems related to education and literacy

Codes under Z55 (Problems related to education and literacy). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

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

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right