2021 ICD-10-CM Code O99.333

Smoking (tobacco) complicating pregnancy, third trimester

Version 2021
Billable Code
Maternity Diagnoses
Diagnoses For Females Only
Third Trimester (28+ weeks)
MS-DRG Mapping

Valid for Submission

O99.333 is a billable diagnosis code used to specify a medical diagnosis of smoking (tobacco) complicating pregnancy, third trimester. The code O99.333 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The code O99.333 is applicable to female patients aged 12 through 55 years inclusive. It is clinically and virtually impossible to use this code on a non-female patient outside the stated age range.

ICD-10:O99.333
Short Description:Smoking (tobacco) complicating pregnancy, third trimester
Long Description:Smoking (tobacco) complicating pregnancy, third trimester

Code Classification

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

Convert O99.333 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code O99.333 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Information for Patients


Pregnancy and Substance Abuse

When you are pregnant, you are not just "eating for two." You also breathe and drink for two. If you smoke, use alcohol or take illegal drugs, so does your unborn baby.

To protect your baby, you should avoid

If you are pregnant and you are doing any of these things, get help. Your healthcare provider can recommend programs to help you quit. You and your baby's health depend on it.

Dept. of Health and Human Services Office on Women's Health


[Learn More]

Code History

  • 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 (First year ICD-10-CM implemented into the HIPAA code set)