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ICD-10-CM · FY 2026 APRIL UPDATE

O99.3

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

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
O99.31Alcohol use complicating pregnancy, childbirth, and the puerperiumCategory
O99.310Alcohol use complicating pregnancy, unspecified trimesterBillable
O99.311Alcohol use complicating pregnancy, first trimesterBillable
O99.312Alcohol use complicating pregnancy, second trimesterBillable
O99.313Alcohol use complicating pregnancy, third trimesterBillable
O99.314Alcohol use complicating childbirthBillable
O99.315Alcohol use complicating the puerperiumBillable
O99.32Drug use complicating pregnancy, childbirth, and the puerperiumCategory
O99.320Drug use complicating pregnancy, unspecified trimesterBillable
O99.321Drug use complicating pregnancy, first trimesterBillable
O99.322Drug use complicating pregnancy, second trimesterBillable
O99.323Drug use complicating pregnancy, third trimesterBillable
O99.324Drug use complicating childbirthBillable
O99.325Drug use complicating the puerperiumBillable
O99.33Tobacco use disorder complicating pregnancy, childbirth, and the puerperiumCategory
O99.330Smoking (tobacco) complicating pregnancy, unspecified trimesterBillable
O99.331Smoking (tobacco) complicating pregnancy, first trimesterBillable
O99.332Smoking (tobacco) complicating pregnancy, second trimesterBillable
O99.333Smoking (tobacco) complicating pregnancy, third trimesterBillable
O99.334Smoking (tobacco) complicating childbirthBillable
O99.335Smoking (tobacco) complicating the puerperiumBillable
O99.34Other mental disorders complicating pregnancy, childbirth, and the puerperiumCategory
O99.340Other mental disorders complicating pregnancy, unspecified trimesterBillable
O99.341Other mental disorders complicating pregnancy, first trimesterBillable
O99.342Other mental disorders complicating pregnancy, second trimesterBillable
O99.343Other mental disorders complicating pregnancy, third trimesterBillable
O99.344Other mental disorders complicating childbirthBillable
O99.345Other mental disorders complicating the puerperiumBillable
O99.35Diseases of the nervous system complicating pregnancy, childbirth, and the puerperiumCategory
O99.350Diseases of the nervous system complicating pregnancy, unspecified trimesterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.