ICD-10-CM 2027 diagnosis code

O99.33Tobacco use disorder complicating pregnancy, childbirth, and the puerperium

Not billable — use a more specific code

O99.33 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.Short description: Tobacco use disorder comp pregnancy, chldbrth, and the puerp

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O99.33

O99.33 is the ICD-10-CM diagnosis code for tobacco use disorder complicating pregnancy, childbirth, and the puerperium. It belongs to category O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), block O94-O9A (other obstetric conditions, not elsewhere classified) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within O99.3 (mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium), O99.33 is specifically for tobacco use disorder complicating pregnancy, childbirth, and the puerperium. Related codes cover alcohol use complicating pregnancy, childbirth, and the puerperium (O99.31), drug use complicating pregnancy, childbirth, and the puerperium (O99.32), other mental disorders complicating pregnancy, childbirth, and the puerperium (O99.34) and diseases of the nervous system complicating pregnancy, childbirth, and the puerperium (O99.35).

To report this condition, pick the subcode that matches the documentation: O99.330 (trimester), O99.331 (trimester), O99.332 (trimester), O99.333 (trimester), O99.334 (childbirth) and O99.335 (puerperium).

Use an additional code from category F17 to identify type of tobacco nicotine dependence. Use an additional code to identify specific condition.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (title revised).

Specific codes under O99.33

Coding notes

Applicable toConditions and synonyms classified to this code

Smoking complicating pregnancy, childbirth, and the puerperium

Use additional codeAdd a secondary code to fully describe the condition

code from category F17 to identify type of tobacco nicotine dependence

Notes that apply from higher levels

Instructions written at a parent level also apply to O99.33.

› From O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

Includes

conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes2

when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

code to identify specific condition

Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to O99.33.

Codes whose notes reference O99.33

F17Excludes2
Z72.0Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
FY2017 (effective 10/1/2016): Title revised — was “Smoking (tobacco) complicating pregnancy, childbirth, and the puerperium”

Common questions about O99.33

Is O99.33 billable?: No. O99.33 is a header code. Report one of its more specific subcodes instead.