ICD-10-CM Q40.1 is the diagnosis code for Congenital hiatus hernia. This code falls under the section "Other congenital malformations of the digestive system" within Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0). 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.
The following conditions should never be coded at the same time as Q40.1. They are mutually exclusive:
Understanding where Q40.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, Q40.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Q40.1 is the ICD-10-CM diagnosis code for "Congenital hiatus hernia". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Q40.1 is Q40 ("Other congenital malformations of upper alimentary tract"). Q40.1 provides a more specific classification within this category.
Q40.1 is located in Section Q38-Q45 — "Other congenital malformations of the digestive system" within Chapter 17 of the ICD-10-CM Tabular List.
Use Q40.1 when the patients documented diagnosis matches "Congenital hiatus hernia" 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 Congenital hiatus hernia is Q40.1.
Yes, Q40.1 can be used as a primary diagnosis code since it is billable and specific.
Q40.1 is in Chapter 17 of the ICD-10-CM Tabular List.
Type 1 Excludes for Q40.1 include: congenital diaphragmatic hernia (Q79.0).
Yes, Q40.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.