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Additional

See see also Accessory
chromosome (s)Q99.8
chromosome (s), markerSee Extra, marker chromosomes
chromosome (s), sexSee Abnormal, chromosome, sex
chromosome (s), 21See Trisomy, 21

Source: official CMS/NCHS ICD-10-CM Index to Diseases and Injuries. Informational only.

Data current as of FY2026 CMS/NCHS release. Not affiliated with or endorsed by CMS, HHS, or NCHS.

ICD-10-CM

Diagnosis Codes Diagnosis Index External Causes Index Table of Drugs Table of Neoplasms Coding Guidelines

Other Code Sets

ICD-10-PCS Procedure Codes HCPCS Level II Codes ICD-9-CM Diagnosis Codes ICD-9-CM Procedure Codes

Tools

ICD-9 ↔ ICD-10 Crosswalk MS-DRG Lookup Annual Code Changes

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