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2025 ICD-10-CM code O41.1491

Placentitis occurring during an unspecified trimester, affecting fetus 1.

This code is for use only on maternal records, never on newborn records.An additional code from category Z3A, Weeks of gestation, should be used to identify the specific week of pregnancy, if known.

The medical necessity of using this code is established by the presence of signs, symptoms, or laboratory findings indicating placental inflammation.The trimester of the pregnancy must also be documented.

The physician is responsible for diagnosing and managing the condition, which includes monitoring the health of both mother and fetus, ordering appropriate lab tests, and implementing a treatment plan to prevent further complications.

In simple words: Inflammation of the placenta in a pregnant woman carrying twins, triplets, or more, affecting the first identified fetus. The specific stage of pregnancy is unknown.

This code describes an infection or inflammation of the placenta during pregnancy, affecting the first fetus in a multiple gestation pregnancy. The trimester in which the infection occurs is not specified.

Example 1: A pregnant woman carrying twins presents with fever, abdominal pain, and elevated white blood cell count. Ultrasound reveals inflammation of the placenta impacting one of the twins., A pregnant woman in her second trimester, expecting triplets, is diagnosed with a bacterial infection affecting the placenta surrounding one of the fetuses., During routine prenatal care, a woman pregnant with quadruplets is found to have placental inflammation affecting the fetus identified as Fetus 1. 

Documentation should include ultrasound findings, laboratory test results confirming infection if available, the trimester of pregnancy,details about fetal monitoring, and treatment plan.

** This code is specifically for use when the trimester is not specified. For reporting placental abruption or previa, different codes are used.

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