2025 ICD-10-CM code O10.912
Unspecified pre-existing hypertension complicating pregnancy, second trimester.
Medical necessity for using this code is established by the diagnosis of chronic hypertension before pregnancy and its presence during the second trimester, which poses a risk to both the mother and fetus. These risks include pre-eclampsia, fetal growth restriction, and placental abruption.
The physician is responsible for diagnosing and managing the pre-existing hypertension during pregnancy, including monitoring blood pressure, assessing for any associated complications (such as pre-eclampsia or eclampsia), and prescribing appropriate medication or lifestyle modifications. Documentation of blood pressure readings, medication prescribed, patient education and counseling are crucial. Regular fetal monitoring is necessary to assess the impact of hypertension on fetal development. The healthcare provider should counsel the patient about potential risks, management strategies, and when to seek immediate medical attention.
In simple words: This code indicates that a pregnant woman had high blood pressure before becoming pregnant, and this condition is present during the second trimester (14-28 weeks) of pregnancy. It does not specify the type of high blood pressure.
Unspecified pre-existing hypertension complicating pregnancy, second trimester. This code is used for pre-existing hypertension without proteinuria. The second trimester is defined as 14 weeks 0 days to less than 28 weeks 0 days.
Example 1: A 20-year-old woman in her second trimester (18 weeks) presents for a routine prenatal visit. She has a history of chronic hypertension, which was diagnosed before her pregnancy. Her current blood pressure readings are elevated. This scenario necessitates the use of code O10.912., A 30-year-old pregnant woman at 22 weeks gestation is admitted to the hospital for preterm labor. Her medical history includes pre-existing essential hypertension. In this case, both O10.912 and the code for preterm labor are used., A 35-year-old pregnant woman with pre-existing hypertension, diagnosed before pregnancy, presents at 25 weeks gestation with severe headaches and elevated blood pressure. Upon examination, she is found to have proteinuria, leading to a diagnosis of superimposed pre-eclampsia. Code O11.412 is used in this situation due to the development of pre-eclampsia.
Documentation should include the type of pre-existing hypertension, blood pressure readings during the second trimester, any other signs or symptoms, treatment provided, and fetal monitoring results. Trimester, weeks of gestation, type of hypertension, associated complications (if any), and severity should be noted. Weeks of gestation can be further specified with a Z3A code. Symptoms and signs of hypertension such as headaches, edema, and visual disturbances should be documented.
** It is important to remember that codes from Chapter 15 of ICD-10-CM are to be used only on the maternal record, not the newborn's record.
- Specialties:Obstetrics and Gynecology, Maternal-Fetal Medicine, Internal Medicine
- Place of Service:Office, Inpatient Hospital, On Campus-Outpatient Hospital, Off Campus-Outpatient Hospital