ICD-10 Code O10.911 - Unspecified pre-existing hypertension complicating pregnancy, first trimester

ICD-10-CM Diagnosis Code O10.911

Diagnosis Code: O10.911 (Raw: O10911)

Description: Unspecified pre-existing hypertension complicating pregnancy, first trimester

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code O10.911 is designated for Unspecified pre-existing hypertension complicating pregnancy, first trimester. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.