2025 ICD-10-CM code O10.412
Pre-existing secondary hypertension complicating pregnancy, second trimester.
The medical necessity for the use of code O10.412 lies in identifying and accurately documenting pre-existing secondary hypertension complicating the second trimester of pregnancy for appropriate management and risk stratification to prevent maternal and fetal complications.
The clinician's responsibility includes:* Thoroughly documenting the patient’s blood pressure readings throughout the pregnancy.* Identifying the underlying cause of the secondary hypertension.* Managing the hypertension to minimize risks to both the mother and the fetus.* Consulting with specialists as needed, such as a nephrologist or cardiologist.* Educating the patient about the importance of medication adherence, lifestyle modifications, and regular prenatal check-ups.
In simple words: A pregnant woman in her second trimester (weeks 14-28) has high blood pressure due to another health problem.This high blood pressure was present before she became pregnant.
This code describes a condition where a patient has pre-existing secondary hypertension, meaning hypertension caused by an underlying condition, which is present during the second trimester of her pregnancy.
Example 1: A 30-year-old woman with a history of renal artery stenosis (a narrowing of the artery supplying blood to the kidney, causing hypertension) is 18 weeks pregnant and her routine blood pressure check shows elevated readings confirming her chronic pre-existing secondary hypertension., A 35-year-old pregnant woman in her second trimester known with hyperaldosteronism (hormonal disorder leading to hypertension) experiences consistently high blood pressure readings requiring adjustments to her medication regimen and closer monitoring., A 28-year-old woman with pre-existing pheochromocytoma (rare adrenal gland tumor causing hypertension) enters her second trimester of pregnancy, and her blood pressure is closely managed to prevent complications for herself and the baby.
* Confirmation of pregnancy with gestational age.* Evidence of pre-existing secondary hypertension before pregnancy.* Type of secondary hypertension (e.g., renal, endocrine).* Blood pressure readings during the second trimester.* Treatment plan and response to treatment.* Any associated signs or symptoms (e.g., headaches, edema).* Use additional code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of pregnancy.* Use additional code from category I15 to identify the type of secondary hypertension.
- Specialties:* Obstetrics and Gynecology* Maternal-Fetal Medicine* Internal Medicine
- Place of Service:* Office* Inpatient Hospital* Outpatient Hospital