Non-Billable / Non-Specific Code
ICD-10-CM O24.31 is the diagnosis code for Unspecified pre-existing diabetes mellitus in pregnancy. This code falls under the section "Other maternal disorders predominantly related to pregnancy" within Chapter 15 — Pregnancy, childbirth and the puerperium (O00-O9A). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where O24.31 sits in the ICD-10-CM classification helps ensure proper coding:
No, O24.31 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
O24.31 is the ICD-10-CM diagnosis code for "Unspecified pre-existing diabetes mellitus in pregnancy". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of O24.31 is O24.3 ("Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium"). O24.31 provides a more specific classification within this category.
O24.31 is located in Section O20-O29 — "Other maternal disorders predominantly related to pregnancy" within Chapter 15 of the ICD-10-CM Tabular List.
O24.31 has 4 sub-code(s) that provide more specific detail: O24.311, O24.312, O24.313, O24.319.
Use O24.31 when the patients documented diagnosis matches "Unspecified pre-existing diabetes mellitus in pregnancy" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Unspecified pre-existing diabetes mellitus in pregnancy is O24.31.
No, O24.31 is non-billable. Use a more specific sub-code for primary diagnosis billing.
O24.31 is in Chapter 15 of the ICD-10-CM Tabular List.
Yes, O24.31 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.