Z55
ICD-10Non-billable categoryProblems related to education and literacy
Official ICD-10-CM descriptor (FY2026)
Problems related to education and literacy
Z55 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- disorders of psychological development (F80-F89)
More specific codes under Z55
- Z55.0Illiteracy and low-level literacy
- Z55.1Schooling unavailable and unattainable
- Z55.2Failed school examinations
- Z55.3Underachievement in school
- Z55.4Educational maladjustment & discord w teachers & 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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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.