Z55.1
✓ Billable
Schooling unavailable and unattainable
ICD-10-CM · FY2026 · Factors Influencing Health Status
Code
Z55.1
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Factors Influencing Health Status
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Z55.1?
ICD-10-CM code Z55.1 represents Schooling unavailable and unattainable. It is a billable diagnosis code in the Factors Influencing Health Status chapter, effective October 1, 2025 – September 30, 2026.
Is Z55.1 billable?
Yes. Z55.1 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Z55.1 in?
Z55.1 belongs to the Factors Influencing Health Status chapter (Z00–Z99) of ICD-10-CM.
Related codes in the Z55 category
Z55
Problems related to education and literacy
Non-billable
Z55.0
Illiteracy and low-level literacy
Billable
Z55.2
Failed school examinations
Billable
Z55.3
Underachievement in school
Billable
Z55.4
Educational maladjustment and discord with teachers and classmates
Billable
Z55.5
Less than a high school diploma
Billable
Z55.6
Problems related to health literacy
Billable
Z55.8
Other problems related to education and literacy
Billable
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