Problems related to education and literacy (Z55) ICD-10-CM
The Z55 code range covers problems related to education and literacy with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the Z55 Range 10 codes · 9 billable
- Z55 Problems related to education and literacyNon-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
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Z55 range.
Absenteeism
Chronic absence from work or other duty.
About the Z55 Code Range
The Z55 series of ICD-10 codes identify issues related to education and literacy that impact a person's ability to learn or perform academically. These codes cover a range of educational challenges, from illiteracy to problems with school attendance and academic achievement.
Codes such as Z55.0 specifically address illiteracy and low-level literacy, useful for indicating when an individual cannot read well or at all. The code Z55.1 applies to situations where schooling is unavailable or unattainable, including forced school exclusion. Z55.2 and Z55.3 cover failed school exams and underachievement in school, helping coders document academic difficulties or failure to reach expected education levels. Z55.4 highlights problems with social adjustment in school settings, like discord with teachers or classmates. Additionally, Z55.6 is designated for health literacy problems, identifying when limited understanding impairs health-related education. Other codes such as Z55.8 and Z55.9 capture miscellaneous or unspecified educational issues, including absenteeism or incomplete education. Using these ICD-10 codes clarifies the specific educational or literacy-related challenges a person faces, facilitating clearer communication in healthcare and social services documentation.
Questions About This Page
How many billable codes are in the Z55 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Z55 range classify?
The range classifies problems related to education and literacy. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
