As of October 1st, 2015, which coding system is used for coding diagnoses in any healthcare setting?

The use of the ICD-10-CM coding system for coding diagnoses in healthcare settings began on October 1st, 2015, marking a significant transition from the previous ICD-9-CM system. ICD-10-CM, which stands for the International Classification of Diseases, 10th Revision, Clinical Modification, offers a more comprehensive and detailed approach to coding patient diagnoses. This system includes a broader range of codes that encompass not only new diseases and conditions but also improved specificity for existing diagnoses.

One of the primary reasons for shifting to ICD-10-CM was to enhance data accuracy, facilitate better clinical decision-making, and improve health records' overall quality. This change aligns with the healthcare industry's ongoing efforts to modernize and ensure more efficient management of healthcare information for improved patient care and outcomes. The other coding systems mentioned serve different purposes: CPT codes are primarily used for outpatient and procedural coding, and HCPCS Level II encompasses non-physician services, such as durable medical equipment. Therefore, ICD-10-CM is the correct answer as it specifically corresponds to the coding of diagnoses in all healthcare settings as of the stated date.