Q87.40
✓ Billable
Marfan syndrome, unspecified
ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities
Code
Q87.40
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Congenital Malformations, Deformations and Chromosomal Abnormalities
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Q87.40?
ICD-10-CM code Q87.40 represents Marfan syndrome, unspecified. It is a billable diagnosis code in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.
Is Q87.40 billable?
Yes. Q87.40 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Q87.40 in?
Q87.40 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.
Related codes in the Q87 category
Q87
Other specified congenital malformation syndromes affecting multiple systems
Non-billable
Q87.0
Congenital malformation syndromes predominantly affecting facial appearance
Billable
Q87.1
Congenital malformation syndromes predominantly associated with short stature
Non-billable
Q87.2
Congenital malformation syndromes predominantly involving limbs
Billable
Q87.3
Congenital malformation syndromes involving early overgrowth
Billable
Q87.4
Marfan syndrome
Non-billable
Q87.5
Other congenital malformation syndromes with other skeletal changes
Billable
Q87.8
Other specified congenital malformation syndromes, not elsewhere classified
Non-billable
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