ICD-10-CM Q87.40 is the diagnosis code for Marfan syndrome, unspecified. This code falls under the section "Other congenital malformations" within Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where Q87.40 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Q87.40 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Q87.40 is the ICD-10-CM diagnosis code for "Marfan syndrome, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Q87.40 is Q87.4 ("Marfan syndrome"). Q87.40 provides a more specific classification within this category.
Q87.40 is located in Section Q80-Q89 — "Other congenital malformations" within Chapter 17 of the ICD-10-CM Tabular List.
Use Q87.40 when the patients documented diagnosis matches "Marfan syndrome, unspecified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Marfan syndrome, unspecified is Q87.40.
Yes, Q87.40 can be used as a primary diagnosis code since it is billable and specific.
Q87.40 is in Chapter 17 of the ICD-10-CM Tabular List.
Yes, Q87.40 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.