O36.511 Maternal care for known or suspected placental insufficiency, first trimester

ICD-10-CM Code O36.511: Maternal care for known or suspected placental insufficiency, first trimester

ICD-10-CM code O36.511 designates maternal care for known or suspected placental insufficiency during the first trimester, classified as a pathologic function. The condition is also called placental dysfunction or uteroplacental vascular insufficiency. A pregnant individual with this condition usually does not have symptoms, though associated diseases like preeclampsia can be symptomatic and cause it. 3 4 5

What this code represents

ICD-10-CM code O36.511 represents maternal care for known or suspected placental insufficiency during the first trimester, and the concept is classified under the semantic type of pathologic function. 5

Plain-language overview

Placental insufficiency is referred to by several names, including placental dysfunction, uteroplacental vascular insufficiency, and oligohydramnios. A pregnant individual with this condition usually does not have symptoms, but symptomatic diseases like preeclampsia can cause it. 3

Clinical context

Clinical evaluations for suspected placental issues may involve assessing related conditions like fetal growth restriction. Suspected pre-eclampsia, which can cause placental insufficiency, is defined by new-onset or worsening hypertension, dipstick proteinuria, or fetal growth restriction. 2 3

Certain medicines can increase the risk for placental insufficiency. Getting prenatal care early in pregnancy helps make sure the mother is as healthy as possible, and avoiding certain substances may help prevent placental insufficiency and other pregnancy complications. 3

Documentation considerations

Healthcare providers measure the size of the growing womb at each visit starting about halfway through pregnancy to monitor for complications. Documentation for placental insufficiency may also involve noting related complications such as placental abruption or premature separation of the placenta. 3

What the sources add

The EVS Explore source provides the official code designation and semantic classification, while the MedlinePlus source provides clinical synonyms and the asymptomatic nature of the condition. Together, these sources establish the administrative code meaning alongside the clinical presentation of the diagnosis. 3 5

The EVS Explore source lists the specific first-trimester timeframe for code O36.511, whereas the MedlinePlus source describes clinical monitoring beginning halfway through pregnancy. This comparison shows a difference between the coding timeframe and the clinical monitoring timeline described in the sources. 3 4

Coding details

Code O36.511 is documented as Maternal care for known or suspected placental insufficiency, first trimester. The broader code O36.511 is listed alongside a more specific variant, O36.5113, within the same coding resource. 4

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Placental growth factor testing to assess women with suspected pre-eclampsia: a multicentre, pragmatic, stepped-wedge cluster-randomised controlled trial — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Placental insufficiency: MedlinePlus Medical Encyclopedia — medlineplus.gov; accessed 2026-07-25.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
5. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.