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 | ✓ |
| Z55.0 | Illiteracy and low-level literacy | ✓ |
| Z55.1 | Schooling unavailable and unattainable | ✓ |
| Z55.1 | Schooling unavailable and unattainable | ✓ |
| Z55.2 | Failed school examinations | ✓ |
| Z55.2 | Failed school examinations | ✓ |
| Z55.3 | Underachievement in school | ✓ |
| Z55.3 | Underachievement in school | ✓ |
| Z55.4 | Educational maladjustment and discord with teachers and classmates | ✓ |
| Z55.4 | Educational maladjustment and discord with teachers and classmates | ✓ |
| Z55.5 | Less than a high school diploma | ✓ |
| Z55.5 | Less than a high school diploma | ✓ |
| Z55.6 | Problems related to health literacy | ✓ |
| Z55.6 | Problems related to health literacy | ✓ |
| Z55.8 | Other problems related to education and literacy | ✓ |
| Z55.8 | Other problems related to education and literacy | ✓ |
| Z55.9 | Problems related to education and literacy, unspecified | ✓ |
| Z55.9 | Problems related to education and literacy, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Z55?
Z55 is an ICD-10-CM category covering Problems related to education and literacy. It contains 18 more specific diagnosis codes, 18 of which are billable.
Is Z55 a billable code?
No — Z55 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Z55.0 — Illiteracy and low-level literacy). 18 of the 18 codes under Z55 are billable.
What codes fall under Z55?
Z55 includes Z55.0, Z55.0, Z55.1, Z55.1, Z55.2, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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