In the ICD-10 world, the definition for many diagnostic conditions have been revised or expanded to include additional information. In some cases, the definitions are more detailed than what the condition described in ICD-9. In other cases, ICD-10 introduces new coding conventions that previously did not exist. Here are some examples:

Granularity

In ICD-10, the diagnosis “Edema” (782.3) has been revised to include the following more specific definitions:

• R60.0 – Edema, Localized
• R60.1 – Edema, Generalized
• R60.9 – Edema, Unspecified

Laterality

In ICD-10, diagnosis “Impacted Cerumen” (380.4) has been expanded to include laterality:

• H61.20 – Impacted Cerumen, Unspecified
• H61.21 – Impacted Cerumen, Right Ear
• H61.22 – Impacted Cerumen, Left Ear
• H61.23 – Impacted Cerumn, Bilateral

Trimester

In ICD-10, diagnosis “Malnutrition in Pregnancy (648.93) has been expanded to include trimester:

• O25.10 – Malnutrition in Pregnancy, Unspecified Trimester
• O25.11 – Malnutrition in Pregnancy, First Trimester
• O25.12 – Malnutrition in Pregnancy, Second Trimester
• O25.13 – Malnutrition in Pregnancy, Third Trimester

Episode of Care

In ICD-10, diagnosis “Contusion of hand(s) (923.20) must be reported with the appropriate ICD-10 code that specifies a seventh digit for the episode of care:

• S60.211A – Contusion of Right Hand, Initial Encounter
• S60.211D – Contusion of Right Hand, Subsequent Encounter
• S60.211S – Contusion of Right Hand, Sequela