Z55Header code — not billable
Problems related to education and literacy
- Chapter
- 21. Factors influencing health status and contact with health services
- Category
- Z55
- Effective date
- October 1, 2026
Related codes in category Z55
Z55.0Illiteracy and low-level literacyYesZ55.1Schooling unavailable and unattainableYesZ55.2Failed school examinationsYesZ55.3Underachievement in schoolYesZ55.4Educational maladjustment & discord w teachers & classmatesYesZ55.5Less than a high school diplomaYesZ55.6Problems related to health literacyYesZ55.8Other problems related to education and literacyYesZ55.9Problems related to education and literacy, unspecifiedYes
Frequently asked questions
What is ICD-10 code Z55?
Z55 is an ICD-10-CM diagnosis code for Problems related to education and literacy.
Is Z55 a billable code?
No. Z55 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is Z55 in?
Z55 falls under Chapter 21: Factors influencing health status and contact with health services.
When did Z55 become effective?
Z55 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Z55?
Z55 belongs to category Z55, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.