ICD-10-CM 2027 diagnosis code
Z55.3Underachievement in school
Z55.3 is a valid, billable ICD-10-CM code for underachievement in school. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Underachievement in school.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Z55.3
Z55.3 is the ICD-10-CM diagnosis code for underachievement in school. It belongs to category Z55 (problems related to education and literacy), block Z55-Z65 (persons with potential health hazards related to socioeconomic and psychosocial circumstances) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Z55 (problems related to education and literacy), Z55.3 is specifically for underachievement in school. Related codes cover Illiteracy and low-level literacy (Z55.0), Schooling unavailable and unattainable (Z55.1), failed school examinations (Z55.2), 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.
It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as V62.3 (educational circumstances).
Notes that apply from higher levels
Instructions written at a parent level also apply to Z55.3.
Broader instructions also apply from Chapter 21: Factors influencing health status and contact with health services.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to Z55.3.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 23 · Factors Influencing Health Status and Other Contacts with Health Services
ICD-9-CM equivalent
Converter →- V62.3Educational circumstancesapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Z55.3
Is Z55.3 billable?
- Yes. Z55.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z55.3 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 Z55.3 a CC or MCC?
- No. Z55.3 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Z55.3 group to?
- Z55.3 is used in the MS-DRG v44.0 logic for MS-DRG 951 (Other Factors Influencing Health Status). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.