2024 ICD-10-CM Diagnosis Code K35.31
Acute appendicitis with localized peritonitis and gangrene, without perforation
- ICD-10-CM Code:
- K35.31
- ICD-10 Code for:
- Acute appendicitis with loc peritonitis and gangr, w/o perf
- Is Billable?
- Yes - Valid for Submission
- Chronic Condition Indicator: [1]
- Not chronic
- Code Navigator:
K35.31 is a billable diagnosis code used to specify a medical diagnosis of acute appendicitis with localized peritonitis and gangrene, without perforation. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.
Clinical Classification
Clinical Category | CCSR Category Code | Inpatient Default CCSR | Outpatient Default CCSR |
---|---|---|---|
Appendicitis and other appendiceal conditions | DIG009 | Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis. | Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis. |
Peritonitis and intra-abdominal abscess | DIG016 | N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis. | N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis. |
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).
- - Appendicitis (pneumococcal) (retrocecal) - K37
- - with
- - gangrene - K35.891
- - with localized peritonitis - K35.31
- - peritonitis NEC - K35.33
- - gangrene - K35.891
- - acute (catarrhal) (fulminating) (obstructive) (retrocecal) (suppurative) - K35.80
- - with
- - specified NEC - K35.890
- - with gangrene - K35.891
- - with localized peritonitis - K35.31
- - with gangrene - K35.891
- - with
- - Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) - See Also: Necrosis; - I96
- - appendix - K35.80
- - with
- - peritonitis, localized - See Also: Appendicitis; - K35.31
- - with
- - appendix - K35.80
Replacement Code
K3531 replaces the following previously assigned ICD-10-CM code(s):
- K35.3 - Acute appendicitis with localized peritonitis
Patient Education
Appendicitis
The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation. If the blockage is not treated, the appendix can burst and spread infection into the abdomen. This causes a condition called peritonitis.
The main symptom is pain in the abdomen, often on the right side. It is usually sudden and gets worse over time. Other symptoms may include:
- Swelling in the abdomen
- Loss of appetite
- Nausea and vomiting
- Constipation or diarrhea
- Inability to pass gas
- Low fever
Not everyone with appendicitis has all these symptoms.
Appendicitis is a medical emergency. Treatment almost always involves removing the appendix. Anyone can get appendicitis, but it is more common among people 10 to 30 years old.
NIH: National Institute of Diabetes and Digestive and Kidney Diseases
[Learn More in MedlinePlus]
Gangrene
Gangrene is the death of tissues in your body. It happens when a part of your body loses its blood supply. Gangrene can happen on the surface of the body, such as on the skin, or inside the body, in muscles or organs. Causes include:
- Serious injuries
- Problems with blood circulation, such as atherosclerosis and peripheral arterial disease
- Diabetes
Skin symptoms may include a blue or black color, pain, numbness, and sores that produce a foul-smelling discharge. If the gangrene is internal, you may run a fever and feel unwell, and the area may be swollen and painful.
Gangrene is a serious condition. It needs immediate attention. Treatment includes surgery, antibiotics, and oxygen therapy. In severe cases an amputation may be necessary.
[Learn More in MedlinePlus]
Peritoneal Disorders
Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.
Disorders of the peritoneum are not common. They include:
- Peritonitis - an inflammation of the peritoneum
- Cancer
- Complications from peritoneal dialysis
Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.
[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
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.