Here's the contact info from Raytel's FAQ page regarding their service. This is the service in which I am enrolled. I've also seen them on Amazon.com!
I understand you can also buy the machine and strips outright from them, probably still need the "medical necessity" form:
"Q: How do I get started?
A: First, discuss your interest in testing at home with your doctor. If he/she approves,
he/she will need to complete 2 forms, and fax them to Raytel at 1-877-729-8354. Those
forms (INR Service Enrollment Form & Medical Necessity Form) can be downloaded from
this site.
Q: What will this cost me?
A: For patients with Mechanical Heart Valves, the testing is covered by Medicare and most
insurance companies. Depending on your particular situation, your costs will vary. Under
Medicare, you may be responsible for a co-pay fee. Our insurance specialists will be able
to provide you with more specific information.
Q: Will my doctor still be involved in my care?
A: Yes. After each test you will phone your results to Raytel, and we will prepare a report
and fax it to your doctor?s office. Based on your results, your doctor?s office will direct you
further as needed.
Q: How do I get a meter and supplies?
A: Raytel will provide you with everything you need, including a testing meter, strips and
supplies, all of which will be mailed to you.
Q: How long will it take me to get started testing at home?
A: Typically it takes us a week or 2 to process the forms and get insurance approval.
Q: Who can I call for more information?
A: Raytel's INR@Home service 1-877-729-8350."