Could b6 deficiency cause high fibrin levels (600mg/l with a normal range of 200 to 400). thank you?

I assume you mean high fibrinogen levels. Normal fibrinogen is between 200 and 400 mg/dL. A fibrinogen value of more than 700 mg/dL may mean you're in danger of forming clots that could harm your heart or brain. Since you are in that "gray area" between 400 and 700, I would ask your doctor if further testing is needed, or possibly a referral to a hematologist.