Who this is for: All Barti users who post iMed (EyeMed) payments.
Before you start, you'll need:
The iMed EOB pulled from the iMed provider portal — not TriZetto
The mass payment record open in Barti with header fields completed
See How do I post an insurance payment in Barti using mass payments? if you haven't set up the mass payment yet.
Key facts about iMed before you post
Always use the iMed portal EOB — never the TriZetto version. The iMed EOB in TriZetto does not show chargebacks. If you post from it, your write-offs will be wrong and invoices will not zero out correctly.
iMed shows both a payment amount AND a separate chargeback column on the same line item.
iMed sometimes charges sales tax — this appears as a separate line on the EOB and must be posted as an additional chargeback.
iMed code numbers sometimes have extra digits vs. your EHR codes. Match by charge amount if the last two digits differ.
Posting a standard iMed payment with chargeback
Example: iMed shows frame payment $40, frame chargeback $16.
Calculate the net payment: $40 − $16 = $24.
Enter $24 in the right column (Insurance Amount Paid).
In the middle column, add two adjustment lines:
Line 1 — CO-45 Contractual: the full outstanding insurance balance (e.g., $110)
Line 2 — Chargeback: $16 (matching the chargeback amount from the EOB)
Verify the invoice zeros out.
Click Apply Payment to Invoice.
Note: iMed's EOB math does not always equal your billed amount exactly, especially for frames. The contractual write-off should be billed amount minus patient responsibility — not necessarily what the EOB shows as "write-off."
Posting iMed sales tax
When iMed charges sales tax:
Locate the tax line on the iMed EOB.
In the middle column, add a Chargeback adjustment for the tax amount.
In the right column, enter the tax as a negative payment (matching amount).
Posting math quick reference
Scenario | Right column | Middle column |
Payment $40, chargeback $16 | Net: $24 | CO-45: outstanding balance + Chargeback: $16 |
Sales tax $4.50 | −$4.50 | Chargeback: $4.50 |
Troubleshooting
The invoice isn't zeroing out after posting.
The most common cause is using the TriZetto EOB instead of the iMed portal EOB — chargebacks are missing from the TriZetto version. Pull the EOB from the iMed portal and recheck your numbers.
The iMed code on the EOB doesn't match the CPT code on my invoice.
iMed appends extra digits to some codes. This is a known issue — match line items by charge amount rather than expecting an exact code match.
iMed is charging sales tax but I'm not sure where to add it.
Add the sales tax as a chargeback line in the middle column with a matching negative payment in the right column. You can attach it to an existing line item (e.g., CR-39 lens) or add it as a standalone adjustment row.