2026 ICD-10-CM Diagnosis Code B65.8Other schistosomiasis
ICD-10-CM Codes›A00–B99›B65-B83›B65
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B65.8 is a billable ICD-10-CM diagnosis code for other schistosomiasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. 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 6 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.
- Hepatic schistosomiasis
- Infection by Schistosoma bovis
- Infection by Schistosoma hippopotami
- Infection by Schistosoma incognitum
- Infection by Schistosoma indicum
- Infection by Schistosoma mattheii
- Infection by Schistosoma nasalis
- Infection by Schistosoma spindale
- Infection by Schistosomatium
- Infection by Schistosomatium douthitti
- Infection caused by Schistosoma intercalatum
- Infection caused by Schistosoma mekongi
- Periportal fibrosis
- Pipestem portal cirrhosis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Infection due to Schistosoma intercalatum
- Infection due to Schistosoma mattheei
- Infection due to Schistosoma mekongi
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
bovis B65.8
intercalatum B65.8
mattheei B65.8
mekongi B65.8
specified type NEC B65.8
spindale B65.8
chestermani B65.8
S. mattheii B65.8
specified type NEC B65.8
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Neuroschistosomiasis
schistosomiasis of the brain, spinal cord, or meninges caused by infections with trematodes of the genus schistosoma (primarily schistosoma japonicum; schistosoma mansoni; and schistosoma haematobium in humans). s. japonicum infections of the nervous system may cause an acute meningoencephalitis or a chronic encephalopathy. s. mansoni and s. haematobium nervous system infections are associated with acute transverse myelitis involving the lower portions of the spinal cord. (from joynt, clinical neurology, 1998, ch27, pp61-2)Schistosomiasis
infection with flukes (trematodes) of the genus schistosoma. three species produce the most frequent clinical diseases: schistosoma haematobium (endemic in africa and the middle east), schistosoma mansoni (in egypt, northern and southern africa, some west indies islands, northern 2/3 of south america), and schistosoma japonicum (in japan, china, the philippines, celebes, thailand, laos). s. mansoni is often seen in puerto ricans living in the united states.Schistosomiasis haematobia
a human disease caused by the infection of parasitic worms schistosoma haematobium. it is endemic in africa and parts of the middle east. tissue damages most often occur in the urinary tract, specifically the urinary bladder.Schistosomiasis japonica
schistosomiasis caused by schistosoma japonicum. it is endemic in the asia, eastern and affects the bowel, liver, and spleen.Schistosomiasis mansoni
schistosomiasis caused by schistosoma mansoni. it is endemic in africa, the middle east, south america, and the caribbean and affects mainly the bowel, spleen, and liver.
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 B65.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B65.8Overview
What is the ICD-10 code for other schistosomiasis?
The ICD-10-CM code for other schistosomiasis is B65.8 (sometimes written as B658). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is B65.8 (Schistosomiasis [bilharziasis]) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other schistosomiasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B65.8 group to?
When other schistosomiasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B65.8 a CC or MCC?
CMS lists B65.8 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 6 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B65.8?
Under the General Equivalence Mappings, other schistosomiasis converts to ICD-9-CM 120.8 (schistosomiasis NEC). The mapping is a direct match.
