Z55.5
✓ BillableLess than a high school diploma
Factors influencing health status and contact with health services (Z00-Z99)
Also Known As
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • disorders of psychological development (F80-F89)
Clinical Description
ICD-10-CM code Z55.5 represents less than a high school diploma. This code falls under the Factors influencing health status and contact with health services (Z00-Z99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that Z55.5 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code Z55.5?
ICD-10-CM code Z55.5 is "Less than a high school diploma". It belongs to the category: Factors influencing health status and contact with health services (Z00-Z99).
Is Z55.5 a billable ICD-10 code?
Yes, Z55.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with Z55.5?
Z55.5 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in Z55
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)