O24.1
Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 7 never code together
Instructional notes 12
O24.1code
Inclusion terms
- Insulin-resistant diabetes mellitus in pregnancy, childbirth and the puerperium
O00-O9Achapter
Notes
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
Use additional code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 5 same parent — O24
O24.0 Pre-exist type 1 diabetes, in preg, chldbrth and the puerp category O24.3 Unsp pre-exist diabetes in pregnancy, chldbrth and the puerp category O24.4 Gestational diabetes mellitus category O24.8 Oth pre-exist diabetes in pregnancy, chldbrth, and the puerp category O24.9 Unsp diabetes in pregnancy, childbirth and the puerperium category
Subordinate codes 3
Medications 4
81 Diabetes Mellitus, Type 2 drugs 232 Diabetes Mellitus drugs 49 Diabetes Mellitus, Type 1 drugs 1315 Female Urogenital Diseases and Pregnancy Complications drugs
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.