🧬 Chapter 17 · Q00-Q99
Birth Defects Diagnosis Codes
Congenital malformation codes document structural or functional abnormalities present at birth. From heart defects to chromosomal conditions like Down syndrome, these codes are essential for coordinating the complex, multi-specialist care these conditions often require.
About This Chapter
Chapter 17 of the ICD-10-CM classification covers congenital malformations, deformations and chromosomal abnormalities, spanning codes Q00-Q99. These codes are used by healthcare providers to document diagnoses in your electronic health record (EHR), on insurance claims, and on medical bills.
Why this matters: If you see a code starting with Q on your medical bill or health records, it likely falls in this chapter. Understanding what chapter your code belongs to can help you make sense of your diagnosis and ask better questions at your next appointment.
Diagnosis Codes in This Chapter
Browse the 7 diagnosis codes we currently cover in this chapter. Select any code to read a plain-English explanation.