High Homocysteine - Second Opinion

[sharp971]

Hi:
This is a question about my father. He is 65 years old and diabetic with coronary heart disease. He is currently taking Diabetes and High Cholesterol(Statins) drugs. He has had Angioplasty 6 times during last few years and continue to have same issue almost every year or so.
I was doing some research and came across the additional risk factor, "Homocysteine" to be another root cause of the heart blockages, in addition to high LDL. His LDL is now normal with meds but went to get his homocysteine levels checked. His results showed that his homocysteine was 13. Which is high as its supposed to be <11.
I wanted another opinion on this because of two reasons.
Reason 1: My father continued to have repeated blockages and stent procedures but doctor never ever checked "Homocysteine" before.
Reason 2: When I insisted to check and it came out higher he is still saying its nothing to worry about.
Its either doctor lacks awareness on homocysteine or he wants to stand by his decision of not doing the homocysteine tests earlier.
Any feedback would be very helpful.

[sharp971]

Thanks curmudgen. Looks like there is no clear standards on this yet.
This website says >11.4 = Elevated
http://en.wikipedia.org/wiki/Homocysteine

I read couple of books and they insist that to reduce this level below 6 if you also have borderline B12 deficiency (i.e 230-450 range) and have repeated coronary blockages despite having Cholesterol under control.

B12 - Homocysteine - Heart disease link:
http://www.amazon.com/Could-Be-B12-Epidemic-Misdiagnoses/dp/1884995691/ref=sr_1_1?s=books&ie=UTF8&qid=1300464344&sr=1-1

Homocysteine - Heart disease link
http://www.amazon.com/Heart-Revolution-Extraordinary-Discovery-Cholesterol/dp/B003F76K2C/ref=sr_1_2?s=books&ie=UTF8&qid=1300464307&sr=1-2

I am still doing some research on the topic and more and more it looks like 15 is waay too high if you have other symptoms.

[curmudgen]

  according to medicinenet.com ... homocysteine site....13 would be in normal range....

"Homocysteine levels are measured in the blood by taking a blood sample. Normal levels are in the range between 5 to 15 micromoles (measurement unit of small amount of a molecule) per liter. Elevated levels are classified as follows:

15-30 micromoles per liter as moderate
30-100 micromoles per liter as intermediate
Greater than 100 micromoles per liter as severe"