Version 2024

2024 ICD-10-CM Diagnosis Code O99.3

Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium

ICD-10-CM Code:
O99.3
ICD-10 Code for:
Mental disord and dis of the nervous sys compl preg/chldbrth
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Pregnancy, childbirth and the puerperium
    (O00-O9A)
    • Other obstetric conditions, not elsewhere classified
      (O94-O9A)
      • Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
        (O99)

O99.3 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Mental disord and dis of the nervous sys compl preg/chldbrth

Non-specific codes like O99.3 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for mental disord and dis of the nervous sys compl preg/chldbrth:

  • O99.31 for Alcohol use complicating pregnancy, childbirth, and the puerperium - NON-BILLABLE CODE

  • Use O99.310 for Alcohol use complicating pregnancy, unspecified trimester - BILLABLE CODE

  • Use O99.311 for Alcohol use complicating pregnancy, first trimester - BILLABLE CODE

  • Use O99.312 for Alcohol use complicating pregnancy, second trimester - BILLABLE CODE

  • Use O99.313 for Alcohol use complicating pregnancy, third trimester - BILLABLE CODE

  • Use O99.314 for Alcohol use complicating childbirth - BILLABLE CODE

  • Use O99.315 for Alcohol use complicating the puerperium - BILLABLE CODE

  • O99.32 for Drug use complicating pregnancy, childbirth, and the puerperium - NON-BILLABLE CODE

  • Use O99.320 for Drug use complicating pregnancy, unspecified trimester - BILLABLE CODE

  • Use O99.321 for Drug use complicating pregnancy, first trimester - BILLABLE CODE

  • Use O99.322 for Drug use complicating pregnancy, second trimester - BILLABLE CODE

  • Use O99.323 for Drug use complicating pregnancy, third trimester - BILLABLE CODE

  • Use O99.324 for Drug use complicating childbirth - BILLABLE CODE

  • Use O99.325 for Drug use complicating the puerperium - BILLABLE CODE

  • O99.33 for Tobacco use disorder complicating pregnancy, childbirth, and the puerperium - NON-BILLABLE CODE

  • Use O99.330 for Smoking (tobacco) complicating pregnancy, unspecified trimester - BILLABLE CODE

  • Use O99.331 for Smoking (tobacco) complicating pregnancy, first trimester - BILLABLE CODE

  • Use O99.332 for Smoking (tobacco) complicating pregnancy, second trimester - BILLABLE CODE

  • Use O99.333 for Smoking (tobacco) complicating pregnancy, third trimester - BILLABLE CODE

  • Use O99.334 for Smoking (tobacco) complicating childbirth - BILLABLE CODE

  • Use O99.335 for Smoking (tobacco) complicating the puerperium - BILLABLE CODE

  • O99.34 for Other mental disorders complicating pregnancy, childbirth, and the puerperium - NON-BILLABLE CODE

  • Use O99.340 for Other mental disorders complicating pregnancy, unspecified trimester - BILLABLE CODE

  • Use O99.341 for Other mental disorders complicating pregnancy, first trimester - BILLABLE CODE

  • Use O99.342 for Other mental disorders complicating pregnancy, second trimester - BILLABLE CODE

  • Use O99.343 for Other mental disorders complicating pregnancy, third trimester - BILLABLE CODE

  • Use O99.344 for Other mental disorders complicating childbirth - BILLABLE CODE

  • Use O99.345 for Other mental disorders complicating the puerperium - BILLABLE CODE

  • O99.35 for Diseases of the nervous system complicating pregnancy, childbirth, and the puerperium - NON-BILLABLE CODE

  • Use O99.350 for Diseases of the nervous system complicating pregnancy, unspecified trimester - BILLABLE CODE

  • Use O99.351 for Diseases of the nervous system complicating pregnancy, first trimester - BILLABLE CODE

  • Use O99.352 for Diseases of the nervous system complicating pregnancy, second trimester - BILLABLE CODE

  • Use O99.353 for Diseases of the nervous system complicating pregnancy, third trimester - BILLABLE CODE

  • Use O99.354 for Diseases of the nervous system complicating childbirth - BILLABLE CODE

  • Use O99.355 for Diseases of the nervous system complicating the puerperium - BILLABLE CODE

Patient Education


Mental Disorders

What are mental disorders?

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may be occasional or long-lasting (chronic). They can affect your ability to relate to others and function each day.

What are some types of mental disorders?

There are many different types of mental disorders. Some common ones include:

  • Anxiety disorders, including panic disorder, obsessive-compulsive disorder, and phobias
  • Depression, bipolar disorder, and other mood disorders
  • Eating disorders
  • Personality disorders
  • Post-traumatic stress disorder
  • Psychotic disorders, including schizophrenia

What causes mental disorders?

There is no single cause for mental illness. A number of factors can contribute to risk for mental illness, such as:

  • Your genes and family history
  • Your life experiences, such as stress or a history of abuse, especially if they happen in childhood
  • Biological factors such as chemical imbalances in the brain
  • A traumatic brain injury
  • A mother's exposure to viruses or toxic chemicals while pregnant
  • Use of alcohol or recreational drugs
  • Having a serious medical condition like cancer
  • Having few friends, and feeling lonely or isolated

Mental disorders are not caused by character flaws. They have nothing to do with being lazy or weak.

Who is at risk for mental disorders?

Mental disorders are common. More than half of all Americans will be diagnosed with a mental disorder at some time in their life.

How are mental disorders diagnosed?

The steps to getting a diagnosis include:

  • A medical history
  • A physical exam and possibly lab tests, if your provider thinks that other medical conditions could be causing your symptoms
  • A psychological evaluation. You will answer questions about your thinking, feelings, and behaviors.

What are the treatments for mental disorders?

Treatment depends on which mental disorder you have and how serious it is. You and your provider will work on a treatment plan just for you. It usually involves some type of therapy. You may also take medicines. Some people also need social support and education on managing their condition.

In some cases, you may need more intensive treatment. You may need to go to a psychiatric hospital. This could be because your mental illness is severe. Or it could be because you are at risk of hurting yourself or someone else. In the hospital, you will get counseling, group discussions, and activities with mental health professionals and other patients.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.