CDEO case studies

The Certified Documentation Expert Outpatient (CDEO®) is an AAPC credential that validates advanced expertise in clinical documentation improvement (CDI) in the outpatient setting. According to AAPC, it demonstrates proficiency in reviewing provider documentation for completeness, accuracy, and compliance with ICD-10-CM, CPT®, HCPCS Level II, and E/M coding guidelines. It is aimed at professional coders in physician practices, multispecialty groups, and outpatient facilities, as well as auditors, compliance professionals, and CDI specialists who want to move into documentation review and CDI roles. The exam covers four content areas: core documentation review (assessing completeness and specificity, spotting missing elements that affect code selection and medical necessity, and best-practice provider queries); outpatient coding and compliance (linking documentation to code assignment, E/M requirements including medical decision making and time-based coding, payer policies, NCCI edits, and federal regulations); risk adjustment and quality reporting (HCC documentation requirements, quality and value-based care reporting, population health gaps); and communication and provider education (feedback on deficiencies, clinician education, and collaboration to reduce denials). The CDEO case studies are 5 cases and about 4,073 words.