O99.331 Smoking (tobacco) complicating pregnancy, first trimester

ICD10CM code

#### Name of the Condition
- Smoking (tobacco) complicating pregnancy, first trimester
- ICD Code: O99.331

#### Summary
Smoking during the first trimester of pregnancy can pose significant risks to both the mother and the developing fetus. This condition involves tobacco use that complicates prenatal development and maternal health.

#### Causes
The primary cause of this condition is the active use of tobacco products—such as cigarettes, cigars, or smokeless tobacco—by the pregnant individual during the first trimester.

#### Risk Factors
- Active tobacco use or exposure to secondhand smoke.
- Previous history of smoking or tobacco use.
- Lack of access to smoking cessation programs.
- Stress or other socioeconomic factors that contribute to tobacco use.

#### Symptoms
- Increased risk of nausea and vomiting beyond what is normal in pregnancy.
- Potential for reduced fetal growth.
- Elevated maternal heart rate and blood pressure.

#### Diagnosis
- Maternal self-report of tobacco use.
- Consultation and screening for tobacco use during prenatal visits.
- Possible observation of fetal growth retardation through ultrasound.

#### Treatment Options
- Smoking cessation programs and counseling.
- Nicotine replacement therapy, as approved by a healthcare provider.
- Behavioral therapies to support quitting.

#### Prognosis and Follow-Up
- Prognosis improves significantly with cessation of tobacco use.
- Regular prenatal check-ups to monitor fetal development and maternal health.
- Long-term follow-up may be necessary for individuals who continue to use tobacco.

#### Complications
- Increased risk of miscarriage.
- Premature birth and low birth weight.
- Long-term developmental delays or health issues in the child.

#### Lifestyle & Prevention
- Complete cessation of smoking before conception and confirmed abstinence throughout pregnancy.
- Engaging in smoking cessation programs or support groups.
- Avoiding environments with secondhand smoke.

#### When to Seek Professional Help
- Inability to quit smoking independently.
- Onset of severe pregnancy-related symptoms or complications.
- Concerns regarding fetal health or development.

#### Additional Resources
- American Pregnancy Association: [www.americanpregnancy.org](http://www.americanpregnancy.org)
- March of Dimes: [www.marchofdimes.org](http://www.marchofdimes.org)
- Smokefree Women: [www.smokefree.gov/women](https://smokefree.gov/women)

#### Tips for Medical Coders
- Ensure correct trimester is documented to accurately code using O99.331.
- Verify that tobacco use is explicitly stated in the medical record.
- Avoid coding errors by confirming the linkage between smoking and pregnancy diagnosis.

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