2025 ICD-10-CM code O40.2
(Active) Effective Date: N/A Revision Date: N/A Pregnancy, childbirth and the puerperium - Maternal care related to the fetus and amniotic cavity and possible delivery problems 15 Pregnancy, childbirth and the puerperium Feed
Polyhydramnios in the second trimester of pregnancy.
The seventh character specifies the fetus affected (1-9).The seventh character of 0 is for "not applicable or unspecified" and should be used if the number of fetuses is unknown or if it's a singleton pregnancy.
Medical necessity is established by the diagnosis of polyhydramnios and the need for monitoring and management to prevent complications for both the mother and fetus. This may include interventions such as amnioreduction if indicated.
The physician is responsible for diagnosing and managing polyhydramnios, which may involve monitoring the mother and fetus, ultrasound assessments, amnioreduction, or other interventions as needed.
- 15 Pregnancy, childbirth and the puerperium
- O40-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
In simple words: Too much amniotic fluid during the second trimester of pregnancy.
Polyhydramnios, an excessive accumulation of amniotic fluid, occurring during the second trimester of pregnancy (14 weeks 0 days to less than 28 weeks 0 days).
Example 1: A pregnant woman at 20 weeks gestation presents with an abnormally large abdomen and discomfort. Ultrasound reveals polyhydramnios., A routine ultrasound at 16 weeks gestation shows an increased amniotic fluid index (AFI), indicating polyhydramnios., A woman with gestational diabetes experiences rapidly increasing abdominal size and shortness of breath in her second trimester, leading to a diagnosis of polyhydramnios.
Documentation should include ultrasound findings (AFI or single deepest pocket measurement), presence of maternal symptoms (e.g., abdominal discomfort, shortness of breath), and any associated conditions (e.g., gestational diabetes). The specific week of gestation should also be documented using Z3A codes.
** It is crucial to distinguish between mild and severe polyhydramnios as the management strategies and potential risks can differ significantly.If the polyhydramnios is associated with a fetal anomaly, an additional code from category O35 should be assigned. If known, the trimester should be specified using the appropriate 7th character extension.
- Specialties:Obstetrics, Maternal-Fetal Medicine
- Place of Service:Office, Outpatient Hospital, Inpatient Hospital