Q92.8 Other specified trisomies and partial trisomies of autosomes

The ICD-10-CM code for Other specified trisomies and partial trisomies of autosomes is Q92.8 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

17: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Section

Q90-Q99: Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Category Q92

11 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Q92.8:

• Trisomy (syndrome) › 20
• Cat › eye syndrome
• Trisomy (syndrome) › 22
• Trisomy (syndrome) › chromosome specified NEC
• Trisomy (syndrome) › specified NEC
• Syndrome › cat eye
• Syndrome › trisomy › 20 (q)(p)
• Duplication, duplex › chromosome NEC › seen only at prometaphase

Inclusion Terms

• Duplications identified by fluorescence in situ hybridization (FISH)
• Duplications identified by in situ hybridization (ISH)
• Duplications seen only at prometaphase

U.S. Hospital Utilization

• An estimated 3,920 U.S. inpatient stays in 2023 included Q92.8 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

POA indicator for congenital conditions/anomalies and Q00-Q99 exception

Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

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Reference Q92.8 with the canonical source and edition:

Q92.8 — Other specified trisomies and partial trisomies of autosomes. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/Q92.8

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