Delta Dental of Illinois Contact Directory
11 contact channels across 4 types (Email, Fax, Mailing Address, Phone) for claims, prior authorization, provider services, and more.
Last verified Aug 25, 2026 from the payer's published directories.
Phone
4 rows
| Contact | Purpose | Line of Business | Hours | Notes | Source |
|---|---|---|---|---|---|
| 800-323-1743 | Claims Status, Eligibility Benefits, General | Commercial | Customer Service Hours: 7:00 a.m. – 7:00 p.m. Central Time, Monday – Friday; IVR available 24/7 | Automated IVR system can be used to check claim status | Automated IVR system available 24/7 | Delta Dental contact information PDF lists this number for group plans. - General customer service and IVR (find dentists, check claim status) | Group plans general contact (includes providers and members) | View source |
| 888-224-0295 | Eligibility Benefits | Commercial | N/A | State of Illinois plan providers – IVR for eligibility and benefits | View source |
| 630-718-4990 | Provider Services, Credentialing Enrollment | Commercial, Medicaid | N/A | State of Illinois provider resource page lists this number for Professional Relations. - Provider Relations team (professional relations) | State of Illinois dental network participation and credentialing inquiries | View source |
| 630-718-4700 | Provider Services, General | All | N/A | Delta Dental of Illinois main phone number; page states to ask for Professional Relations for provider issues. | Corporate phone number listed on provider contact page. - General provider inquiries (ask for Professional Relations) | General corporate office contact | View source |
Fax
2 rows
| Contact | Purpose | Line of Business | Hours | Notes | Source |
|---|---|---|---|---|---|
| 800-323-1743 | Eligibility Benefits | Commercial | Available 24 hours a day | Benefits on Demand Fax for PPO Plus Premier group plan members; used by dental offices to obtain eligibility and claim information. - PPO Plus Premier group plan members; dental offices only | View source |
| 630-983-4085 | Provider Services, Credentialing Enrollment | Commercial, Medicaid | N/A | Fax for submitting participation/credentialing documents to Professional Relations for State of Illinois network. - Provider Relations team (professional relations) | State of Illinois dental network participation and credentialing documents | View source |
Mailing Addresses
2 rows
| Contact | Purpose | Line of Business | Hours | Notes | Source |
|---|---|---|---|---|---|
| Delta Dental of Illinois, Attn: DDIL – Group Claims, P.O. Box 5402, Lisle, IL 60532 | Claims Submission | Commercial | N/A | Group claims mailing address for Delta Dental PPO Plus Premier and other group plans. | Delta Dental contact information PDF lists this address for group plans. - Group dental claims | Group dental claims for PPO Plus Premier group plan members | Group dental claims for Delta Dental of Illinois group plans | View source |
| Delta Dental of Illinois, Attention Professional Relations, 111 Shuman Boulevard, Naperville, IL 60563 | Provider Services, Credentialing Enrollment, General | All | N/A | State of Illinois resources indicate this address and contacts for network participation. | Corporate mailing address listed on provider contact page. - Professional Relations team mailing address | State of Illinois dental network participation and credentialing | Corporate office address; may be used for general correspondence | View source |
3 rows
| Contact | Purpose | Line of Business | Hours | Notes | Source |
|---|---|---|---|---|---|
| CSI@deltadentalil.com | Eligibility Benefits, Provider Services | All | N/A | Shared customer service inbox | Customer Service email listed with instructions to contact Professional Relations via phone/email for provider issues. - General customer service inquiries (including benefits and claims information) | General customer service; providers instructed to contact Professional Relations as needed | View source |
| medicareadvantage@deltadentalil.com | Provider Services | Medicare | N/A | Medicare Advantage providers – Provider Relations | View source |
| pr@deltadentalil.com | Provider Services, Credentialing Enrollment | All | N/A | Professional Relations department contact for PPO fee schedule and participation questions. - Provider Relations team (professional relations) | Network participation questions, PPO fee schedule requests | View source |
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