ICD10
ICD-10 Code O99.3: Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).
đź“‹Clinical overview
This ICD-10 overview page groups maternal mental-health and nervous-system complication codes under a broad parent code. The most accurate billable code usually depends on whether the record supports a psychiatric versus neurologic child family and whether maternal timing is pregnancy, childbirth, or the puerperium.
When is it used?
- May be used when a clinician documents mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
đź©şClinical context
When commonly used
- Parent-code browsing, coding review, and clinical-reference workflows where the goal is to understand the broader maternal mental-and-neurologic complication family before selecting a timing-specific child code.
- Documentation review where the chart clearly links maternal mental-health or neurologic disease to obstetric care, but the user is navigating the umbrella parent page rather than a more specific child page.
Common workup
- Related procedures or service context already linked on this page include Obstetric ultrasound, Fetal nonstress testing.
Common management context
- Overview-level review often includes psychiatric or neurologic history review, medication review, obstetric monitoring, and coordination with behavioral-health, neurology, or maternal-fetal medicine teams.
- The final billable code usually becomes more specific when the chart identifies maternal timing and whether the underlying condition belongs in a mental-disorder versus nervous-system child family.
- Specialist context already linked on this page includes Obstetrician, Gynecologist, Psychiatrist, Clinical Psychologist.
🔍Key distinctions
Important notes
- This parent page is an umbrella overview spanning both maternal mental-disorder and maternal nervous-system child families rather than a specific billable leaf code.
- Maternal timing and the distinction between psychiatric versus neurologic disease are the key specificity drivers across this family.
- This overview page groups both maternal mental-disorder and nervous-system-disease complication codes across pregnancy, childbirth, and the puerperium, so the final billable code usually depends on maternal timing and whether the chart identifies the psychiatric versus neurologic condition family more specifically.
Related codes to consider
O99.0Anemia complicating pregnancy, childbirth and the puerperium
Related maternal mental-or-nervous-system ICD-10 code; documentation often becomes more specific when the chart identifies maternal timing or clarifies whether the condition is psychiatric versus neurologic.
O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium
Related maternal mental-or-nervous-system ICD-10 code; documentation often becomes more specific when the chart identifies maternal timing or clarifies whether the condition is psychiatric versus neurologic.
O99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium
Related maternal mental-or-nervous-system ICD-10 code; documentation often becomes more specific when the chart identifies maternal timing or clarifies whether the condition is psychiatric versus neurologic.
O99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium
Related maternal mental-or-nervous-system ICD-10 code; documentation often becomes more specific when the chart identifies maternal timing or clarifies whether the condition is psychiatric versus neurologic.
Code hierarchy
chapter
15Pregnancy, childbirth and the puerperium (O00-O9A)
block
O94-O9AOther obstetric conditions, not elsewhere classified
category
O99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
currentO99
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
ObstetricianGynecologistPsychiatristClinical Psychologist
Related procedures
Obstetric ultrasound
May appear in pregnancy follow-up pathways when maternal diseases complicate pregnancy and fetal well-being is monitored.
Fetal nonstress testing
May be used in selected higher-risk pregnancy monitoring pathways.
Related codes
O99.0Anemia complicating pregnancy, childbirth and the puerperiumcategoryO99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumcategoryO99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumcategoryO99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumcategoryO99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumcategoryO99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumcategoryO99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumcategoryO99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumcategory
Sibling codes
O99.0Anemia complicating pregnancy, childbirth and the puerperiumO99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumO99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumO99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumO99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumO99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumO99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumO99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium
Mapped diagnoses and classifications
SNOMED_CT 10755041000119100high
Alcohol dependence in childbirth
Source: SNOMED International ICD-10 map
SNOMED_CT 10741871000119101high
Alcohol dependence in pregnancy
Source: SNOMED International ICD-10 map
SNOMED_CT 788120007high
Antenatal depression
Source: SNOMED International ICD-10 map
SNOMED_CT 10743001000119103high
Anxiety disorder in mother complicating childbirth
Source: SNOMED International ICD-10 map
SNOMED_CT 1344950008high
Anxiety disorder in pregnancy
Source: SNOMED International ICD-10 map
SNOMED_CT 87203005high
Bipolar I disorder, most recent episode depressed with postpartum onset
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
O99.3
Common synonyms
Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.