A quick look for current status of leeches in US medical practice finds that a new FDA approval was granted in 2004 for certain fairly specific uses. The approved uses are associated with removal of rather small amounts of blood, with the principal effect being the anticoagulant secretions from the leech. Where a surgery cannot connect sufficient peripheral small veins, the leech provides minor help preventing local clotting, but it's the anticoagulant effect of the leeching that helps re-establish circulation that is the main effect intended.

The anticoagulant apparently is itself produced by symbiotic gut bacteria in the leech. This bacteria is normally handled by healthy persons, but can infect persons locally where circulation is impaired or more generally in persons with impaired immune response. An incidence of infection in cases where leeching is currently accepted of as much as 20% of cases is cited. - Not particularly good odds for a procedure performed other than under the direct care of someone who can get you the proper antibiotics if needed.

One report sites a source at Leeches USA. Their site does appear to have a fair bit of information, and might be worth a visit for information, even if the US location isn't appropriate as a supplier.

It appears they also sell medical maggots, should you have a future need for some.

Info at their site indicates that one leech typically draws about 5 ml of blood, but that if you keep the bite wound(s) open a half dozen might result in a 300 ml extration by oozing from the bites for 48 hours. The removal required for a typical treatment for the few conditions where phlebotomy is used for the removal of blood in any quantity suggests that you'd need 8 or 10 leeches per treatment, at $7 to $10 each at the price range quoted by this supplier. Since a leech typically won't feed again for 6 months once full, keeping them for re-use probably isn't practical, and a full leech is a biohazard and should be incinerated anyway (probably).

If the particular condition doesn't preclude it, perhaps a periodic blood donation would be more efficient. They might even pay you...(?). Of course, you'll need to verify with your practicioner that your condition wouldn't cause problems for any recipient of your donation.

Nothing here is offered as medical advice, of course. It's all just junk found on the web.

John