BCBS prefix XOF: BCBS of Illinois, PPO
The short answerXOF is a Blue Cross and Blue Shield of Illinois prefix: commercial, on the PPO network. File the claim to your local Blue plan; outside Illinois, BlueCard routes it to BCBS of Illinois by the prefix.
By Javier Alvarez · Updated · 2 min read
What the XOF prefix means
| Home plan | Blue Cross and Blue Shield of Illinois, a division of Health Care Service Corporation (HCSC). Commercial. 1 |
| Network | PPO (network code PPO). Plans: PPO, BlueEdge HSA, BlueEdge HCA, BluePrint, PPO Value Choice and Blue Security PPO. 1 |
| Area | The State of Illinois, plus Lake County, Indiana. 1 |
| How the network works | BCBS of Illinois calls it the state's largest statewide traditional network. Out of network, a lower level of benefits applies. 1 |
| Where to file | To your local Blue plan, the one you're contracted with. Outside Illinois, BlueCard uses the prefix to route the claim to BCBS of Illinois. In Illinois, that is BCBS of Illinois itself. Send the member ID exactly as printed, prefix included. 2 3 |
| Verify benefits | Through your local Blue plan's eligibility tools, or BlueCard Eligibility at 1-800-676-BLUE (2583), before the first visit. 2 |
| Preventive MNT | BCBS of Illinois's preventive services policy (RP006) lists 97802 to 97804 under the USPSTF rows for healthy diet counseling with cardiovascular risk factors and for adults with a BMI of 30 or more. To process with no member cost share, the claim needs a preventive diagnosis code and a preventive procedure code. MNT for other reasons may be covered under another part of the plan, with cost sharing. Grandfathered plans don't have to cover preventive services at no cost share. 4 See MNT coverage at Blue Cross Blue Shield plans. |
What happened to the XOF claims we filed
Of the 37 XOF claims Duo Practice filed since May 2026, about 85% are paid and none was denied; the rest were still in process on October 30, 2026. Paid claims took a median of 5 days from the visit to the payment. That is how these claims went for the practices Duo Practice bills for, not a promise for the next one, and not what any one member's plan covers.
Before a visit with prefix XOF
- Copy the current card, front and back, and enter the member ID exactly as printed, XOF included.
- Verify benefits for 97802 and 97803: through your local Blue plan's eligibility tools, or BlueCard Eligibility at 1-800-676-BLUE (2583). Ask whether nutrition counseling is covered, how many visits, whether a referral is needed, and what the member pays.
- File to your local Blue plan, not to BCBS of Illinois directly, unless BCBS of Illinois is your local plan.
Another prefix? Type it in the lookup above or see every prefix we have. For how BlueCard routes an out-of-state Blue card, see BlueCard for dietitians.