26 weeks gestation of pregnancy

This code indicates that a patient is precisely 26 weeks into their pregnancy. Gestational age is a critical factor in monitoring fetal development, assessing risk, and planning obstetric care. It is typically calculated from the first day of the last menstrual period (LMP) or confirmed by early ultrasound.

This code is used when documenting the gestational age of a pregnant patient at 26 weeks. It is frequently applied during routine prenatal visits, hospital admissions for pregnancy-related conditions, or when reporting services where the exact gestational age is clinically relevant for medical decision-making and billing.

• Always confirm gestational age with physician documentation, preferably based on ultrasound or reliable LMP.
• Do not use this code if the documentation states "26 weeks and a few days" or "almost 27 weeks"; use the appropriate code for the documented week.
• This code is typically a secondary diagnosis, accompanying codes for the pregnancy itself (e.g., O09.-).