OAR 410-123-1620
Procedure and Diagnosis Codes


The Division requires providers to use the standardized code sets adopted by the Health Insurance Portability and Accountability Act (HIPAA) and the Centers for Medicare and Medicaid Services (CMS). Unless otherwise directed in rule, providers must accurately code claims according to the national standards in effect for the date the service(s) was provided.


Procedure codes:


For dental services, use Current Dental Terminology (CDT) codes as maintained and distributed by the American Dental Association. Contact the American Dental Association (ADA) to obtain a current copy of the CDT reference manual. Current Dental Terminology (including procedure codes, definitions (descriptors) and other data) is copyrighted by the ADA. © 2012 American Dental Association. All rights reserved. Applicable Federal Acquisition Regulation Clauses/Department of Defense Federal Acquisition Regulation Supplement (FARS/DFARS) apply;


For physician services and other health care services, use Health Care Common Procedure Coding System (HCPCS) and Current Procedural Terminology (CPT) codes.


Diagnosis codes:


International Classification of Diseases 10th Clinical Modification (ICD-10-CM) diagnosis codes are not required for dental services submitted on an ADA claim form;


When Oregon Administrative Rule (OAR) 410-123-1260 (OHP Dental Benefits) requires services to be billed on a professional claim form, ICD-10-CM diagnosis codes are required. Refer to the Medical-Surgical administrative rules for additional information, OAR 410 division 130.

Source: Rule 410-123-1620 — Procedure and Diagnosis Codes, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=410-123-1620.

Last Updated

Jun. 8, 2021

Rule 410-123-1620’s source at or​.us