2021 ICD-10-CM Code O24.1

Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium

Version 2021
Non-Billable Code

Not Valid for Submission

O24.1 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium. The code is NOT valid for the year 2021 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.

ICD-10:O24.1
Short Description:Pre-exist type 2 diabetes, in preg, chldbrth and the puerp
Long Description:Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium

Code Classification

Specific Coding for Pre-exist type 2 diabetes, in preg, chldbrth and the puerp

Header codes like O24.1 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for pre-exist type 2 diabetes, in preg, chldbrth and the puerp:

  • O24.11 - Pre-existing type 2 diabetes mellitus, in pregnancy
  • O24.111 - Pre-existing type 2 diabetes mellitus, in pregnancy, first trimester
  • O24.112 - Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester
  • O24.113 - Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester
  • O24.119 - Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester
  • O24.12 - Pre-existing type 2 diabetes mellitus, in childbirth
  • O24.13 - Pre-existing type 2 diabetes mellitus, in the puerperium

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code O24.1:


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

Use Additional Code

Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

Information for Patients


Diabetes and Pregnancy

Also called: Gestational diabetes

Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. When you are pregnant, high blood sugar levels are not good for your baby.

About seven out of every 100 pregnant women in the United States get gestational diabetes. Gestational diabetes is diabetes that happens for the first time when a woman is pregnant. Most of the time, it goes away after you have your baby. But it does increase your risk for developing type 2 diabetes later on. Your child is also at risk for obesity and type 2 diabetes.

Most women get a test to check for diabetes during their second trimester of pregnancy. Women at higher risk may get a test earlier.

If you already have diabetes, the best time to control your blood sugar is before you get pregnant. High blood sugar levels can be harmful to your baby during the first weeks of pregnancy - even before you know you are pregnant. To keep you and your baby healthy, it is important to keep your blood sugar as close to normal as possible before and during pregnancy.

Either type of diabetes during pregnancy increases the chances of problems for you and your baby. To help lower the chances talk to your health care team about

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


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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)