8 weeks gestation of pregnancy

This code indicates that a patient is precisely eight weeks into their current pregnancy. Gestational age is typically calculated from the first day of the last menstrual period (LMP) or estimated by ultrasound.

This code is used to specify the exact gestational age when documented as 8 weeks. It is frequently applied in early pregnancy assessments, prenatal visits, and for dating purposes in the first trimester.

• Always confirm the gestational age from the physician's documentation or ultrasound reports.
• This code is a secondary diagnosis and should be used in conjunction with a code from category O09 (Supervision of high-risk pregnancy) or Z3A (Gestational age).
• Do not use if the gestational age is documented as anything other than exactly 8 weeks; choose the appropriate Z3A code for other weeks.