D66
BillableHereditary factor VIII deficiency
D66 is the ICD-10-CM code for Hereditary factor VIII deficiency. It is a billable, specific code valid for reimbursement.
- Status
- Billable
- Chapter
- D50-D89
- Edition
- FY2026
D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
What this means — in plain language
MedlinePlus · NIHWhat is hemophilia? Hemophilia is a rare bleeding disorder in which the blood does not clot properly. This can lead to problems with bleeding too much after an injury or surgery. You can also have sudden bleeding inside your body, such as in your joints, muscles, and organs. Your blood contains many proteins called clotting factors that can help form clots to stop bleeding. People with hemophilia have low levels of…
Read more about Hemophilia at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Classical hemophilia
- •Deficiency factor VIII (with functional defect)
- •Hemophilia NOS
- •Hemophilia A
Excludes1 — not coded here
- •factor VIII deficiency with vascular defect (D68.0-)
Frequently asked questions
- What is ICD-10 code D66?
- D66 is the ICD-10-CM code for "Hereditary factor VIII deficiency". It falls under D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
- Is D66 a billable code?
- Yes — D66 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from D66?
- Excludes1 (not coded here): factor VIII deficiency with vascular defect (D68.0-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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