2026 ICD-10-CM Diagnosis Code K90.2Blind loop syndrome, not elsewhere classified
ICD-10-CM Codes›K00–K95›K90-K95›K90
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
K90.2 is a billable ICD-10-CM diagnosis code for blind loop syndrome, not elsewhere classified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 14 closely related codes. Coders also document this condition as blind loop syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.
K90.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 66 for payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
K90.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Blind loop syndrome
- Megaloblastic anemia due to blind loop syndrome
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Blind loop syndrome NOS
Type 1 Excludes
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.
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Blind See Also: Blindness;
loop syndrome K90.2
Syndrome See Also: Disease;
blind loop K90.2
blind loop K90.2
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.
Patient EducationClinical
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.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K90.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K90.2Overview
What is the ICD-10 code for blind loop syndrome, not elsewhere classified?
The ICD-10-CM code for blind loop syndrome, not elsewhere classified is K90.2 (sometimes written as K902). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is K90.2 (Intestinal malabsorption) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report blind loop syndrome, not elsewhere classified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K90.2 group to?
When blind loop syndrome, not elsewhere classified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K90.2 a CC or MCC?
CMS lists K90.2 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 14 closely related codes in its exclusion list.
What is the ICD-9 equivalent of K90.2?
Under the General Equivalence Mappings, blind loop syndrome, not elsewhere classified converts to ICD-9-CM 579.2 (blind loop syndrome). The mapping is a direct match.
Does K90.2 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: K90.2 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 66 (Pancreatic Disorders and Intestinal Malabsorption, Except Pancreatitis).
