ICD-10-CM 2027
ICD-10 code for Schooling unavailability
From the official ICD-10-CM alphabetic index entry “Unavailability (of) › schooling”. Page updated September 29, 2026.
About coding Schooling unavailability
The ICD-10-CM code for Schooling unavailability is Z55.1 (Schooling unavailable and unattainable).
Within Z55 (problems related to education and literacy), Z55.1 is specifically for Schooling unavailable and unattainable. Related codes cover Illiteracy and low-level literacy (Z55.0), failed school examinations (Z55.2), underachievement in school (Z55.3), educational maladjustment and discord with teachers and classmates (Z55.4), less than a high school diploma (Z55.5), problems related to health literacy (Z55.6), other problems related to education and literacy (Z55.8) and unspecified (Z55.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Schooling unavailability ICD-10 codes
What is the ICD-10 code for Schooling unavailability?
- Z55.1 — Schooling unavailable and unattainable.
Is Z55.1 billable?
- Yes. Z55.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z55.1 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z55.1 a CC or MCC?
- No. Z55.1 is neither a CC nor an MCC under MS-DRG v44.0.