The four types of examinations are problem focused, expanded problem focused, detailed and comprehensive. The types are based on the extent of the history during the history taking portion of the physician-patient encounter. Both problem focused and expanded problem focused levels are defined as a limited examination of the affected body area or organ system. Expanded problem also includes other symptomatic or related organ systems. Detailed level is defined as an extended examination of the affected body area and other symptomatic or related organ systems. Comprehensive level is defined as a general mutli-system examination or complete examination of a single organ system. 

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REFERENCE: 

Carol J. Buck, Saunders (2022).  Step-by-Step Medical Coding, 2022 Edition, by Carol J. Buck, Saunders