D74 MethemoglobinemiaNon-billable header with 3 child codes.
D74.0 Congenital methemoglobinemiaD74.8 Other methemoglobinemiasD74.9 Methemoglobinemia, unspecifiedD58.2 Other hemoglobinopathies ("methemoglobinemia (D74.-)")D58.2 Other hemoglobinopathies ("methemoglobinemia (D74.-)")