Who is affected by this change?

This affects Illinois Medicaid - HFS Dentistry providers in IL on Medicaid plans.

When does this change take effect?

This change is effective Jan 1, 2019.

Which billing codes are affected?

The following codes are affected: D1515, D1516, D1517, D1525, D1526, D1527.

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MedicaidBilling CodesMedium impact

Current Dental Terminology (CDT) Codes - Update

Illinois Medicaid - HFS·IL · Dentistry·Provider Notice

Effective date

Jan 1, 2019

We identified it

Jun 20, 2026

Days to comply

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Summary

The Illinois Department of Healthcare and Family Services has updated dental CDT codes effective January 1, 2019. Four new CDT codes (D1516, D1517, D1526, D1527) now replace two older codes (D1515, D1525).

Action Required

Action needed

Immediately: Billing team must stop using CDT codes D1515 and D1525. Replace D1515 with D1516 and D1517, and replace D1525 with D1526 and D1527 in billing system. Update encounter forms and verify new fee schedule rates on Illinois Department of Healthcare and Family Services website.

Affected Billing Codes

D1515

D1516

D1517

D1525

D1526

D1527

Related policy hubs

Illinois Medicaid - HFS policies IL policy changes Dentistry Code D1515 Code D1516 Code D1517 Code D1525 Code D1526 Code D1527