ICD-10-CM Diagnosis Code O99.343
Diagnosis Code: O99.343 (Raw: O99343)
Description: Other mental disorders complicating pregnancy, third 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 O99.343 is designated for Other mental disorders complicating pregnancy, third 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.