D66: Hereditary factor VIII deficiency
D66 is a billable, specific ICD-10-CM code for hereditary factor viii deficiency. It is valid for submission on a claim.
Check D66 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- factor VIII deficiency with vascular defect (D68.0-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Classical hemophilia
- Deficiency factor VIII (with functional defect)
- Hemophilia NOS
- Hemophilia A
Other codes that can never be billed with D66
Their own Excludes1 notes name this code, so the conflict is not listed above.
- D68.0Von Willebrand disease
Risk adjustment
D66 risk-adjusts. Under the CMS-HCC V28 model it maps to these categories:
- HCC 111 Hemophilia, Male4.639 RAF
- HCC 111 Hemophilia, Male4.639 RAF
- HCC 112 Immune Thrombocytopenia and Specified Coagulation Defects and Hemorrhagic Conditions0.450 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
D66 is named in 1 Medicare coverage policy: 1 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56065Billing and Coding: Guidance for Anti-Inhibitor Coagulant Complex (AICC) National Coverage Determination (NCD) 110.3
Alphabetic index entries that lead here
- Hemophilia(classical) (familial) (hereditary)
- Subhemophilia
- Arthropathy›hemophilic NEC
- Disease, diseased›bleeder's
- Hemophilia›A
- Arthritis, arthritic›due to or associated with›hemophilia
- Arthritis, arthritic›in›hemophilia NEC
- Arthropathy›in›hemophilia NEC
- Deficiency, deficient›anti-hemophilic›factor(A)
- Deficiency, deficient›anti-hemophilic›globulin NEC(AHG)
- Deficiency, deficient›factor›VIII(congenital) (functional) (hereditary) (with functional defect)
Code history
Unchanged in every release from FY2024 to FY2027.