Q87.40 is the authoritative medical code for Marfan syndrome, unspecified. This classification is used in medical billing and clinical recording to specify the clinical criteria for marfan syndrome, unspecified (ICD-10-CM Q87.40), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Marfan syndrome, unspecified is a billable ICD-10-CM diagnosis code Q87.40. Use additional code: code(s) to identify all associated manifestations.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for Q87.40 in the official ICD-10-CM tabular list.
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code(s) to identify all associated manifestations
Frequently Asked Questions (FAQ) & Clinical Guidance
Is an additional code needed with Q87.40?
Use additional code(s) to specify: code(s) to identify all associated manifestations.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to Q87.40 in its code family, with their registry titles.
- Q87 — Other specified congenital malformation syndromes affecting multiple systems
- Q87.0 — Congenital malformation syndromes predominantly affecting facial appearance
- Q87.1 — Congenital malformation syndromes predominantly associated with short stature
- Q87.11 — Prader-Willi syndrome
- Q87.19 — Other congenital malformation syndromes predominantly associated with short stature
- Q87.2 — Congenital malformation syndromes predominantly involving limbs
- Q87.3 — Congenital malformation syndromes involving early overgrowth
- Q87.4 — Marfan syndrome
- Q87.41 — Marfan syndrome with cardiovascular manifestations
- Q87.410 — Marfan syndrome with aortic dilation
View all 25 codes in the Q87 family
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Syndrome, Beals
- Syndrome, Marfan