O26.843 Uterine size-date discrepancy, third trimester

ICD10CM code

#### Name of the Condition
- Uterine Size-Date Discrepancy, Third Trimester
- Medical term: Uterine Size Discrepancy

#### Summary
Uterine size-date discrepancy in the third trimester refers to a situation where the size of the uterus does not match the expected size for the gestational age of the pregnancy. This can indicate either a larger or smaller uterus than anticipated.

#### Causes
- Incorrect dating of the pregnancy.
- Multiple pregnancies (twins, triplets).
- Fetal growth restrictions or macrosomia.
- Polyhydramnios (excess amniotic fluid) or oligohydramnios (less amniotic fluid).
- Fibroids or other uterine abnormalities.

#### Risk Factors
- History of uterine or pregnancy-related issues.
- Pre-existing medical conditions such as diabetes or hypertension.
- Lifestyle factors including inadequate prenatal care and poor nutrition.

#### Symptoms
- Noticeable discrepancy between the gestational age and uterine size during prenatal visits.
- No distinct symptoms experienced by the patient.

#### Diagnosis
- Fundal height measurement that is not consistent with the gestational age.
- Ultrasound examination to assess fetal growth, amniotic fluid, and uterine structure.

#### Treatment Options
- Monitoring through regular prenatal visits and ultrasounds.
- Addressing any underlying conditions such as gestational diabetes or hypertension.
- In some cases, early delivery might be considered if the condition poses risks to mother or baby.

#### Prognosis and Follow-Up
- Prognosis varies depending on underlying cause.
- Regular follow-up is crucial to monitor fetal well-being and manage any complications timely.

#### Complications
- Preterm birth.
- Fetal growth restriction or macrosomia.
- Complications during labor and delivery.

#### Lifestyle & Prevention
- Adequate prenatal care is essential.
- Healthy nutrition and lifestyle choices can reduce risks.
- Managing chronic conditions effectively with healthcare guidance.

#### When to Seek Professional Help
- Concerns about the size of the abdomen or any sudden changes.
- Reduced fetal movements should prompt immediate medical consultation.

#### Additional Resources
- March of Dimes: [marchofdimes.org](https://www.marchofdimes.org)
- American Pregnancy Association: [americanpregnancy.org](https://americanpregnancy.org)

#### Tips for Medical Coders
- Ensure correct gestational age assessment is noted in documentation.
- Verify whether the discrepancy is leading to additional diagnoses that require coding.
- Avoid confusion with other pregnancy-related codes by checking relevant clinical notes.

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