Variation in completeness of coding external cause of injuries under ICD-10-CM.

Introduction: Information about causes of injury is key for injury prevention efforts. Historically, cause-of-injury coding in clinical practice has been incomplete due to the need for extra diagnosis codes in the International Classification of Diseases-Ninth Revision-Clinical Modification (ICD-9-CM) coding. The transition to ICD-10-CM and increased use of clinical support software for diagnosis coding is expected to improve completeness of cause-of-injury coding.

Impact of ICD-10-CM Transition on Mental Health Diagnoses Recording.

Objective: This study examines the impact of the transition from ICD-9-CM to ICD-10-CM diagnosis coding on the recording of mental health disorders in electronic health records (EHRs) and claims data in ten large health systems. We present rates of these diagnoses across two years spanning the October 2015 transition.

Methods: Mental health diagnoses were identified from claims and EHR data at ten health care systems in the Mental Health Research Network (MHRN).