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2025 ICD-10-CM code O40

Polyhydramnios, an excess of amniotic fluid.

Use additional code from category Z3A if the week of gestation is known.Code should only be used on maternal records, not newborn records.If the polyhydramnios is related to another condition (e.g., diabetes), that condition should also be coded.

Medical necessity for diagnosis and management of polyhydramnios is established by clinical findings consistent with the condition and its potential risks to the mother and fetus (e.g., preterm labor, placental abruption, postpartum hemorrhage, and fetal anomalies).

Obstetrician-gynecologist, maternal-fetal medicine specialist.May involve other specialists depending on the underlying cause and complications.

IMPORTANT:O40.1 (Polyhydramnios, first trimester), O40.2 (Polyhydramnios, second trimester), O40.3 (Polyhydramnios, third trimester), O40.9 (Polyhydramnios, unspecified trimester).Additional codes from category Z3A (Weeks of gestation) may be used to specify the week of gestation if known.

In simple words: Polyhydramnios means having too much fluid around the baby during pregnancy. This is usually found with an ultrasound and can be linked to things like diabetes in the mother, twins or more babies, or problems with the baby's chromosomes or body parts.

Polyhydramnios, also known as hydramnios, is characterized by an excessive volume of amniotic fluid surrounding the fetus during pregnancy.This condition is typically diagnosed using ultrasound and is often associated with maternal diabetes, multiple pregnancies, chromosomal abnormalities in the fetus, and fetal congenital anomalies. The diagnosis may specify the trimester (first, second, or third) or may be unspecified.

Example 1: A 35-year-old pregnant woman at 32 weeks gestation presents with shortness of breath and abdominal discomfort. Ultrasound reveals polyhydramnios.Further investigation reveals gestational diabetes., A 28-year-old woman at 20 weeks gestation presents for a routine ultrasound, which reveals polyhydramnios.Amniocentesis is performed to rule out chromosomal abnormalities., A 25-year-old woman delivers twins at 37 weeks. During the pregnancy, she experienced polyhydramnios, which was managed conservatively.

* Detailed obstetrical history.* Results of ultrasound showing excessive amniotic fluid volume (specify measurement if available).* Maternal medical history (diabetes, hypertension, etc.).* Fetal assessment (ultrasound, biophysical profile).* Amniocentesis results (if performed).* Any fetal anomalies identified.* Management plan and treatment outcomes.

** The severity of polyhydramnios is usually described in clinical notes, but this is not typically reflected in the coding.

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