O26.841 Uterine size-date discrepancy, first trimester

ICD10CM code

#### Name of the Condition
- Uterine size-date discrepancy, first trimester
- Also known as first-trimester growth discrepancy, or uterine size-date mismatch.

#### Summary
- Uterine size-date discrepancy in the first trimester occurs when the uterus size does not align with gestational age expectations. This can manifest as the uterus being larger or smaller than anticipated for the duration of the pregnancy.

#### Causes
- Inaccurate dating of the pregnancy
- Multiple gestation (e.g., twins or triplets)
- Ectopic or molar pregnancy
- Fetal growth restrictions
- Congenital abnormalities

#### Risk Factors
- Conceiving with assisted reproductive technology
- History of irregular menstrual cycles leading to inaccurate pregnancy dating
- Previous pregnancies with size discrepancies

#### Symptoms
- Discrepancy is usually noted during routine prenatal checks.
- May be accompanied by other symptoms, depending on the cause (e.g., abdominal pain if ectopic pregnancy is a factor).

#### Diagnosis
- Physical examination to measure uterine size.
- Ultrasound imaging to assess fetal development and exact gestational age.
- Blood tests for hormone levels may be conducted to evaluate pregnancy health.

#### Treatment Options
- Adjusting the due date if the discrepancy is due to incorrect dating.
- Closer monitoring of the pregnancy through more frequent ultrasounds.
- Addressing underlying causes if identified (e.g., managing multiple pregnancies, treating ectopic pregnancy).

#### Prognosis and Follow-Up
- The outlook depends largely on the underlying cause.
- Regular follow-ups can help ensure proper fetal development and pregnancy health.
- Many discrepancies resolve with accurate dating or appropriate prenatal care.

#### Complications
- Preterm birth if due to multiple pregnancies or other growth abnormalities.
- Possible pregnancy loss in cases of atypical underlying causes like ectopic pregnancy.

#### Lifestyle & Prevention
- Maintaining a healthy lifestyle to support fetal growth.
- Early prenatal care allows for accurate dating and monitoring.
- Avoidance of risky behaviors that might impact pregnancy health.

#### When to Seek Professional Help
- If a discrepancy is detected during a routine check, further assessment is crucial.
- Any sudden abdominal pain, bleeding, or severe discomfort should be immediately evaluated.

#### Additional Resources
- [American College of Obstetricians and Gynecologists (ACOG)](https://www.acog.org)
- [March of Dimes](https://www.marchofdimes.org)
- Support groups like BabyCenter's online community 

#### Tips for Medical Coders
- Ensure accurate reporting of trimester and specific discrepancy noted.
- Avoid misclassifying conditions such as regular first-trimester symptoms.
- Cross-reference patient history for previous discrepancies or related conditions for accurate coding.

Medical Policies and Guidelines for Uterine size-date discrepancy, first trimester

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