ICD-10 code for Illiteracy

The ICD-10-CM code for Illiteracy is Z55.0 (Illiteracy and low-level literacy). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Z55.0.

Within Z55 (problems related to education and literacy), Z55.0 is specifically for Illiteracy and low-level literacy. Related codes cover Schooling unavailable and unattainable (Z55.1), 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.