ICD-9 Code 525.66 - Allergy to existing dental restorative material

ICD-9-CM Diagnosis Code 525.66

Diagnosis Code: 525.66 (Raw: 52566)

Description: Allergy to existing dental restorative material

Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)

Fiscal Year: 2026 Reference

CMS Section 111 Status: Valid for reporting.

Overview & Historical Usage

ICD-9-CM code 525.66 is designated for Allergy to existing dental restorative material. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.