The 2023 Edition includes:

• Discussions of the format and conventions followed in ICD-10-CM and ICD-10-PCS
• Basic coding guidelines and introductory material on the supplementary classifications (Z codes and External cause of morbidity codes)
• Up-to-date guidance on coding signs and symptoms, diseases, disorders, procedures, conditions, complications of care, long-term care, and more
• Fiscal year 2023 code updates, including new information on COVID-19, selection and sequencing of HIV codes, ICD-10-CM classification of dementia, updates on hepatic encephalopathy and aneurysms, and a new section on chimeric antigen receptor (CAR) T-cell immunotherapy
• An appendix on coding and reimbursement for hospitals, physicians, and non-hospital providers, with specific guidance for critical access hospitals