DH just had a collection added this weekend to all three reports. It's from a hospital bill that was incurred earlier in 2007. We have the invoices and I reviewed our bank statements back to the Date of Service and apparently we overlooked this because the first post insurance bill was sent to us in the middle of my move to AK. It just slipped my mind to write the check.

Because we know this debt is valid and that its so recent, should we still follow through with the CRA med DV or just move to pay the OC via the letter with insert a? I have no problem proceeding from step one, but wanted to make sure that was the way to do it!

You need the paper trail of "connectivity" between the OC and the reporting CA.
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Send the CRA's the medical dispute letter;
http://whychat.5u.com/hipaadisp.html
As soon as you receive a "verified" from the CRA and/or a statement from the reporting CA you can go ahead with the payment to the OC with the HIPAA letter insert "a". You can, if you wish to send the payment now, but unless you are SURE that the account AS REPORTED is accurate, you are running the risk that your payment will not have the desired. effect.

There will be NO "DV" required, unless after your payment to the OC the account remains or is changed to a "paid" collection.