2024 ICD-10-CM Diagnosis Code K91.2

Postsurgical malabsorption, not elsewhere classified

ICD-10-CM Code:
ICD-10 Code for:
Postsurgical malabsorption, not elsewhere classified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the digestive system
    • Other diseases of the digestive system
      • Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

K91.2 is a billable diagnosis code used to specify a medical diagnosis of postsurgical malabsorption, not elsewhere classified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

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

  • Acquired short bowel syndrome
  • Blind loop syndrome
  • Fatty stool
  • Fatty stool
  • Malnutrition
  • Malnutrition following gastrointestinal surgery
  • Post-gastrointestinal tract surgery malnutrition
  • Postoperative blind loop syndrome
  • Postprocedural intestinal steatorrhea
  • Postprocedural steatorrhea
  • Post-surgical malabsorption
  • Post-surgical malabsorption
  • Protein losing enteropathy due to and following cardiac procedure
  • Protein-losing enteropathy
  • Short bowel syndrome

Clinical Classification

Clinical Information

  • Short Bowel Syndrome

    a malabsorption syndrome resulting from extensive operative resection of the small intestine, the absorptive region of the gastrointestinal tract.
  • Child Nutrition Disorders

    disorders caused by nutritional imbalance, either overnutrition or undernutrition, occurring in children ages 2 to 12 years.
  • Fetal Nutrition Disorders

    disorders caused by nutritional imbalance, either overnutrition or undernutrition, in the fetus in utero.
  • Infant Nutrition Disorders

    disorders caused by nutritional imbalance, either overnutrition or undernutrition, occurring in infants ages 1 month to 24 months.
  • Malnutrition

    an imbalanced nutritional status resulting from insufficient intake of nutrients to meet normal physiological requirement.
  • Protein-Energy Malnutrition

    the lack of sufficient energy or protein to meet the body's metabolic demands, as a result of either an inadequate dietary intake of protein, intake of poor quality dietary protein, increased demands due to disease, or increased nutrient losses.
  • Severe Acute Malnutrition

    acute form of malnutrition which usually affects children, characterized by a very low weight for height (below -3z scores of the median world health organization standards), visible severe wasting, or occurrence of nutritional edema. it can be a direct or indirect cause of fatality in children suffering from diarrhea and pneumonia. do not confuse with starvation, a condition in which the body is not getting enough food, usually for extended periods of time.
  • Blind Loop Syndrome

    a malabsorption syndrome that is associated with a blind loop in the upper small intestine that is characterized by the lack of peristaltic movement, stasis of intestinal contents, and the overgrowth of bacteria. such bacterial overgrowth interferes with bile salts action, fatty acids processing, microvilli integrity, and the absorption of nutrients such as vitamin b12 and folic acid.
  • Fetus

    the unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. in humans, the unborn young from the end of the eighth week after conception until birth, as distinguished from the earlier embryo, mammalian.
  • Short Bowel Syndrome

    malabsorption that results from the removal of a large segment of the small intestine or, less frequently, from the complete dysfunction of a large portion of the small intestine. signs and symptoms include diarrhea, steatorrhea, and weight loss.

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 K91.2 to ICD-9-CM

  • ICD-9-CM Code: 579.3 - Intest postop nonabsorb

Patient Education

After Surgery

After any operation, you'll have some side effects. There is usually some pain with surgery. There may also be swelling and soreness around the area that the surgeon cut. Your surgeon can tell you which side effects to expect.

There can also be complications. These are unplanned events linked to the operation. Some complications are infection, too much bleeding, reaction to anesthesia, or accidental injury. Some people have a greater risk of complications because of other medical conditions.

Your surgeon can tell you how you might feel and what you will be able to do - or not do - the first few days, weeks, or months after surgery. Some other questions to ask are:

  • How long you will be in the hospital
  • What kind of supplies, equipment, and help you might need when you go home
  • When you can go back to work
  • When it is ok to start exercising again
  • Are they any other restrictions in your activities

Following your surgeon's advice can help you recover as soon as possible.

Agency for Healthcare Research and Quality

[Learn More in MedlinePlus]

Malabsorption Syndromes

Your small intestine does most of the digesting of the foods you eat. If you have a malabsorption syndrome, your small intestine cannot absorb nutrients from foods.

Causes of malabsorption syndromes include:

  • Celiac disease
  • Lactose intolerance
  • Short bowel syndrome. This happens after surgery to remove half or more of the small intestine. You might need the surgery if you have a problem with the small intestine from a disease, injury, or birth defect.
  • Whipple disease, a rare bacterial infection
  • Genetic diseases
  • Certain medicines

Symptoms of different malabsorption syndromes can vary. They often include chronic diarrhea, abnormal stools, weight loss, and gas. Your doctor may use lab, imaging, or other tests to make a diagnosis.

Treatment of malabsorption syndromes 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
  • 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] 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.