2024 ICD-10-CM Diagnosis Code K57.90

Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding

ICD-10-CM Code:
ICD-10 Code for:
Dvrtclos of intest, part unsp, w/o perf or abscess w/o bleed
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Diseases of the digestive system
    • Other diseases of intestines
      • Diverticular disease of intestine

K57.90 is a billable diagnosis code used to specify a medical diagnosis of diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like K57.90 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Abscess of intestine co-occurrent and due to diverticular disease
  • Complicated diverticular disease of large intestine
  • Diverticula of intestine
  • Diverticular disease
  • Simple diverticular disease of large intestine

Clinical Classification

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

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.
  • Diverticular disease of intestine NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert K57.90 to ICD-9-CM

  • ICD-9-CM Code: 562.10 - Dvrtclo colon w/o hmrhg
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Diverticulosis and Diverticulitis

What is diverticulosis?

Diverticula are small pouches, or sacs, that bulge outward through weak spots in your colon. They mostly form in the lower part of the colon. Diverticulosis is a condition in which you have these pouches. Most people who have diverticulosis do not have symptoms or problems. But sometimes the pouches can cause symptoms or become inflamed.

What is diverticulitis?

Diverticulitis is the name for the condition you have when one or more of the pouches get inflamed. Diverticulitis may come on suddenly. It can sometimes cause serious health problems.

What is diverticular disease?

Diverticular disease is a condition that happens when the pouches cause:

  • Chronic (long-term) symptoms
  • Diverticular bleeding
  • Diverticulitis or diverticulitis complications

What causes diverticulosis and diverticulitis?

Researchers aren't sure what causes diverticulosis and diverticulitis. They think certain factors may play a role in causing or increasing the risk for these conditions, including:

  • Your genetics. Certain genes may make some people more likely to develop the conditions.
  • Lifestyle factors such as:
    • Diets low in fiber and high in red meat
    • Lack of physical activity
    • Taking certain medicines, such as nonsteroidal anti-inflammatory drugs (NSAIDs) and steroids
    • Having obesity
    • Smoking

Researchers are also looking at other possible factors that may play a role in these conditions. Those factors include bacteria or stool (poop) getting caught in a pouch in your colon and changes in the microbiome in the intestines. Your microbiome is made up of the bacteria and other organisms in your intestines.

Who is more likely to develop diverticulosis and diverticulitis?

Diverticulosis is common, especially as people age. More than one-third of U.S. adults between the ages of 50 and 59 have diverticulosis. More than two-thirds who are over age 80 have it. Most of those people will not have symptoms or problems. But some of them will develop diverticulitis.

What are the symptoms of diverticulosis and diverticulitis?

Diverticulosis usually doesn't cause symptoms. But some people can have chronic symptoms such as:

  • Bloating
  • Constipation or diarrhea
  • Cramping or painin the lower abdomen (belly)

Diverticulitis may cause acute symptoms such as:

  • Abdominal pain, most often in the lower left side of your abdomen
  • Constipation or diarrhea
  • Fevers and chills
  • Nausea or vomiting

The pain caused by diverticulitis is usually severe and comes on suddenly. Less often, the pain may be mild and worsen over several days.

What other problems can diverticulosis and diverticulitis cause?

Some people with diverticulosis and diverticulitis may develop serious health problems (complications). Diverticular bleeding happens when a small blood vessel within the wall of a pouch bursts. The bleeding may be severe and sometimes even life-threatening.

People with diverticulitis can also develop serious problems such as:

  • Abscess, a painful, swollen, pus-filled area caused by infection
  • Fistula, an abnormal opening or passage between the colon and another part of the body, such as the bladder or vagina
  • Intestinal obstruction, a partial or total blockage that keeps food, fluids, air, or stool from moving through your intestines
  • Perforation, or a hole, in your colon
  • Peritonitis, an infection of the lining of the abdominal cavity

How are diverticulosis and diverticulitis diagnosed?

Diverticulosis may be found when your health care provider is doing tests for another reason. Diverticulitis is usually found when you are having an acute attack.

To make a diagnosis, your provider will review your medical history, do a physical exam, and order tests. The tests may include:

  • Blood tests
  • Stool tests
  • Imaging tests such as CT scan, ultrasound, or MRI
  • Colonoscopy

What are the treatments for diverticulosis and diverticulitis?

f your diverticulosis is causing chronic symptoms, your provider may recommend:

  • High-fiber foods or fiber supplements
  • Antibiotics
  • Medicines to reduce inflammation
  • Probiotics

If you have diverticulitis without complications, your provider may recommend treatment at home. However, you probably need treatment in the hospital if you have severe diverticulitis, diverticulitis with complications, or a high risk for complications.

Treatments for diverticulitis may include:

  • Antibiotics, except for very mild cases.
  • A clear liquid diet for a short time to rest the colon. Your provider may suggest slowly adding solid foods to your diet as your symptoms improve.
  • Medicines for pain. This is usually acetaminophen instead of nonsteroidal anti-inflammatory drugs (NSAIDs). NSAIDs may increase the chance of diverticulitis complications.
  • Antispasmodic medicines to relieve spasms.

If your diverticulitis doesn't improve with treatment or if it causes complications, you may need surgery to remove part of your colon.

Can diverticulitis be prevented?

Your provider may recommend lifestyle changes to prevent diverticulitis:

  • Eating a diet high in fiber and low in red meat
  • Being physically active on a regular basis
  • Not smoking (and quitting smoking if you are a smoker)
  • Reaching and maintaining a healthy weight

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

[Learn More in MedlinePlus]

Diverticular Disease

Overview of diverticular disease, which occurs when diverticula lead to chronic symptoms, diverticular bleeding, or diverticulitis or related complications.
[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.