2026 ICD-10-CM Diagnosis Code B78.1Cutaneous strongyloidiasis
ICD-10-CM Codes›A00–B99›B65-B83›B78
- Billable — Valid for Submission
- Not Chronic
B78.1 is a billable ICD-10-CM diagnosis code for cutaneous strongyloidiasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 602 through 603. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders; and Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cutaneous strongyloidiasis
- Infection by Strongyloides stercoralis
- Infectious edema
- Strongyloidal cutaneous larva migrans
- Strongyloidal ground itch
- Urticaria due to strongyloidiasis
- Urticaria secondary to infection
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Strongyloidiasis, strongyloidosis - B78.9
- cutaneous - B78.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Strongyloidiasis, strongyloidosis
- cutaneous
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
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Convert B78.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B78.1Overview
Is B78.1 (Strongyloidiasis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report cutaneous strongyloidiasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B78.1 group to?
When cutaneous strongyloidiasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 602, 603, with relative weights from 0.8709 to 1.4213 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of B78.1?
Under the General Equivalence Mappings, cutaneous strongyloidiasis converts to ICD-9-CM 686.8 (local skin infection NEC). The mapping is approximate, so confirm the match fits the documentation.
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.
