Billable / Specific Code
ICD-10-CM O10.919 is the diagnosis code for Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester. This code falls under the section "Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium" within Chapter 15 — Pregnancy, childbirth and the puerperium (O00-O9A). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. 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 O10.919 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, O10.919 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
O10.919 is the ICD-10-CM diagnosis code for "Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of O10.919 is O10.91 ("Unspecified pre-existing hypertension complicating pregnancy"). O10.919 provides a more specific classification within this category.
O10.919 is located in Section O10-O16 — "Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium" within Chapter 15 of the ICD-10-CM Tabular List.
Use O10.919 when the patients documented diagnosis matches "Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester" 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 hypertension complicating pregnancy, unspecified trimester is O10.919.
Yes, O10.919 can be used as a primary diagnosis code since it is billable and specific.
O10.919 is in Chapter 15 of the ICD-10-CM Tabular List.
Yes, O10.919 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.