ICD-10-CM Code K31.1

Adult hypertrophic pyloric stenosis

Version 2020 Billable Code Adult Diagnoses

Valid for Submission

K31.1 is a billable code used to specify a medical diagnosis of adult hypertrophic pyloric stenosis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code K31.1 might also be used to specify conditions or terms like acquired hypertrophic pyloric stenosis, acquired nonhypertrophic constriction of pylorus, acquired obstruction of pylorus, acquired obstruction of pylorus, acquired pyloric constriction, acquired pyloric stricture, etc

The code K31.1 is applicable to adult patients aged 15 through 124 years inclusive. It is clinically and virtually impossible to use this code on a patient outside the stated age range.

ICD-10:K31.1
Short Description:Adult hypertrophic pyloric stenosis
Long Description:Adult hypertrophic pyloric stenosis

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code K31.1:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Pyloric stenosis NOS

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • congenital or infantile pyloric stenosis Q40.0

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code K31.1 are found in the index:


Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • Adult diagnoses - Adult. Age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acquired hypertrophic pyloric stenosis
  • Acquired nonhypertrophic constriction of pylorus
  • Acquired obstruction of pylorus
  • Acquired obstruction of pylorus
  • Acquired pyloric constriction
  • Acquired pyloric stricture
  • Adult hypertrophic pyloric stenosis
  • Gastric outlet obstruction due to gallstone
  • Peptic ulcer with hemorrhage, with perforation AND with obstruction
  • Pyloric antral stenosis
  • Pyloric obstruction
  • Pyloric obstruction
  • Pyloric obstruction
  • Pyloric stenosis
  • Pyloric stenosis

Diagnostic Related Groups

The ICD-10 code K31.1 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.

  • 380 - COMPLICATED PEPTIC ULCER WITH MCC
  • 381 - COMPLICATED PEPTIC ULCER WITH CC
  • 382 - COMPLICATED PEPTIC ULCER WITHOUT CC/MCC

Convert K31.1 to ICD-9

  • 537.0 - Acq pyloric stenosis

Code Classification

  • Diseases of the digestive system (K00–K93)
    • Diseases of esophagus, stomach and duodenum (K20-K31)
      • Other diseases of stomach and duodenum (K31)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine.

Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention.

You should see a doctor if you have any of the following:

  • Blood when you have a bowel movement
  • Severe abdominal pain
  • Heartburn not relieved by antacids
  • Unintended weight loss
  • Ongoing vomiting or diarrhea

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


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