Invoices for Services
The billing period ends on the last day of the month.
Statements and invoices are prepared on the first day of the month. Clients can receive statements and invoices by U.S mail, fax, or email. Charges can also be accessed through the VMDL portal.
Invoices must be paid within 30 days of receipt to avoid service charges.
Methods of Payment
For your convenience, several methods of payment are available. These include:
- Via the Portal
Phone: Call the VMDL business office (573) 884-9274 or (573) 884-9275. Have your credit card and account number ready.
Mail: Send payment to the address below. Be sure to include your account number with payment.
Veterinary Medical Diagnostic Lab
P.O. Box 6023
Columbia, MO 65205
In order to make a payment online, you will need to provide the following information:
1. Customer name
2. One of the following:
a. Account number (located on the top right-hand corner of monthly invoice) OR
b. Invoice number (located below the account number)
Minimum online payment is $1.00.
Payments made online may take 1-2 business days to be reflected on the VMDL portal website.
Via the Portal: Any clinic or business that is a client of the VMDL can gain free access to the portal by registering at
Once registered, you will be able to view test results and also view and pay charges.