2026 ICD-10-CM Diagnosis Code B78.0Intestinal strongyloidiasis
ICD-10-CM Codes›A00–B99›B65-B83›B78
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B78.0 is a billable ICD-10-CM diagnosis code for intestinal strongyloidiasis. 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, 974 through 976. 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 16 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Intestinal strongyloidiasis
- Parasitic infection causing inflammation of small intestine
- Parasitic infection of colon caused by Strongyloides
- Strongyloides duodenitis
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
strongyloidiasis B78.0
strongyloidiasis B78.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Strongyloidiasis
infection with nematodes of the genus strongyloides. the presence of larvae may produce pneumonitis and the presence of adult worms in the intestine could lead to moderate to severe diarrhea.Strongyloides
a genus of parasitic nematodes widely distributed as intestinal parasites of mammals.Strongyloidiasis
an infection that is caused by nematodes of the genus strongyloides, most commonly strongyloides stercoralis, which is a soil-transmitted helminth, and which is characterized by a variety of gastrointestinal, dermatologic, and, occasionally, pulmonary manifestations. the worm's autoinfective life cycle can lead to hyper-infection and life-threatening dissemination in immunocompromised hosts decades after initial infection.
Patient EducationClinical
Parasitic Diseases
Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B78.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B78.0Overview
What is the ICD-10 code for intestinal strongyloidiasis?
The ICD-10-CM code for intestinal strongyloidiasis is B78.0 (sometimes written as B780). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is B78.0 (Strongyloidiasis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report intestinal strongyloidiasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B78.0 group to?
When intestinal strongyloidiasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, 974, 975, 976, with relative weights from 0.7796 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B78.0 a CC or MCC?
CMS lists B78.0 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 16 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B78.0?
Under the General Equivalence Mappings, intestinal strongyloidiasis converts to ICD-9-CM 127.2 (strongyloidiasis). The mapping is approximate, so confirm the match fits the documentation.
