What Is a Diagnosis?Deducing the Diagnosis: HistoryDeducing the Diagnosis: ExamConstitutionalEyesEars, Nose, Mouth, and ThroatNeckRespiratoryCardiovascularChest (Breasts)Gastrointestinal (Abdomen)GenitourinaryLymphaticMusculoskeletalSkinNeurologicPsychiatricReality CheckDeducing the Diagnosis: Medical Decision MakingDocumenting the DiagnosisWhat Number Is My Diagnosis?How Hard Can This Be?What Are the Rules?Conventions: Section I.A.Instructional Notes: Section I.A.General Coding Guidelines: Section I.A.What Is the Structure of the Diagnosis Codes?Which Diagnosis Is Listed First?InpatientOutpatient and Physician OfficeWhat’s in Each Diagnosis Chapter?Chapter 1: Certain Infectious and Parasitic Diseases (A00–B99)Chapter 2: Neoplasms (C00–D49)Chapter 3: Diseases of the Blood and Blood-Forming Organs (D50–D89)Chapter 4: Endocrine, Nutritional, and Metabolic Diseases (E00–E89)Chapter 5: Mental, Behavioral, and Neurodevelopmental Disorders (F01–F99)Chapter 6: Diseases of the Nervous System (G00–G99)Chapter 7: Diseases of the Eye and Adnexa (H00–H59)Chapter 8: Diseases of the Ear and Mastoid Process (H60–H95)Chapter 9: Diseases of the Circulatory System (I00–I99)Chapter 10: Diseases of the Respiratory System (J00–J99)Chapter 11: Diseases of the Digestive System (K00–K94)Chapter 12: Diseases of the Skin and Subcutaneous Tissue (L00–L99)Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00–M99)Chapter 14: Diseases of the Genitourinary System (N00–N99)Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00–O9A)Chapter 16: Certain Conditions Originating in the Perinatal Period (P00–P96)Chapter 17: Congenital Malformations, Deformations, and Chromosomal Abnormalities (Q00–Q99)Chapter 18: Symptoms, Signs, and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00–R99)Chapter 19: Injury, Poisoning, and Certain Other Consequences of External Causes (S00–T88)Chapter 20: External Causes of Morbidity (V00–Y99)Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00–Z99)How Can You Code Your Conditions?Keeping Up-to-DateMisdiagnosis: The Wrong PathReferences