Billable / Specific Code
ICD-10-CM K31.1 is the diagnosis code for Adult hypertrophic pyloric stenosis. This code falls under the section "Diseases of esophagus, stomach and duodenum" within Chapter 11 — Diseases of the digestive system (K00-K95). 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 K31.1. They are mutually exclusive:
Understanding where K31.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, K31.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
K31.1 is the ICD-10-CM diagnosis code for "Adult hypertrophic pyloric stenosis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of K31.1 is K31 ("Other diseases of stomach and duodenum"). K31.1 provides a more specific classification within this category.
K31.1 is located in Section K20-K31 — "Diseases of esophagus, stomach and duodenum" within Chapter 11 of the ICD-10-CM Tabular List.
Use K31.1 when the patients documented diagnosis matches "Adult hypertrophic pyloric stenosis" 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 Adult hypertrophic pyloric stenosis is K31.1.
Yes, K31.1 can be used as a primary diagnosis code since it is billable and specific.
K31.1 is in Chapter 11 of the ICD-10-CM Tabular List.
Type 1 Excludes for K31.1 include: congenital or infantile pyloric stenosis (Q40.0).
Yes, K31.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.