ICD-10-CM Code O24.03

Pre-existing type 1 diabetes mellitus, in the puerperium

Version 2020 Billable Code Maternity Diagnoses Diagnoses For Females Only

Valid for Submission

O24.03 is a billable code used to specify a medical diagnosis of pre-existing type 1 diabetes mellitus, in the puerperium. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

The code O24.03 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:O24.03
Short Description:Pre-existing type 1 diabetes mellitus, in the puerperium
Long Description:Pre-existing type 1 diabetes mellitus, in the puerperium

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code O24.03 are found in the index:


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:

  • Maternity diagnoses - Maternity. Age range is 12–55 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).
  • Diagnoses for females only - Medicare Code Editor detects inconsistencies between a patient’s sex and any diagnosis on the patient’s record, this code applies to FEMALES only .

Convert O24.03 to ICD-9

  • 648.04 - Diabetes-postpartum (Approximate Flag)

Code Classification

  • Pregnancy, childbirth and the puerperium (O00–O99)
    • Other maternal disorders predominantly related to pregnancy (O20-O29)
      • Diabetes in pregnancy, childbirth, and the puerperium (O24)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - Code Updated, effective from 10/1/2016 through 9/30/2017
    • New Description: Pre-existing diabetes mellitus, type 1, in the puerperium
    • Previous Description: Pre-existing diabetes mellitus, type 1, in the puerperium
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Diabetes and Pregnancy

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

  • A meal plan for your pregnancy
  • A safe exercise plan
  • How often to test your blood sugar
  • Taking your medicine as prescribed. Your medicine plan may need to change during pregnancy.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


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