2027 ICD-10-CM Diagnosis Code B65.9Schistosomiasis, unspecified
ICD-10-CM Codes›A00–B99›B65-B83›B65
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B65.9 is a billable ICD-10-CM diagnosis code for schistosomiasis, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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.
- Acute schistosomiasis
- Associated pulmonary arterial hypertension
- Bleeding esophageal varices
- Cardiopulmonary schistosomiasis
- Cystitis with bilharziasis
- Disease caused by Schistosomatidae
- Disorder of urinary bladder caused by Schistosoma
- Encephalitis caused by Schistosoma
- Esophageal varices associated with another disorder
- Esophageal varices with bleeding due to schistosomiasis
- Glomerular disease due to infectious disease
- Glomerular disease due to parasitic disease
- Glomerular disorder due to infection caused by Schistosoma
- Granuloma of brain caused by Schistosoma
- Hepatic granuloma
- Hepatic schistosomal granuloma
- Hepatic schistosomiasis
- Hepatosplenic schistosomiasis
- Infection by Schistosoma
- Infection of lower respiratory tract and mediastinum
- Infection of spleen
- Myelitis caused by Schistosoma
- Neuroschistosomiasis
- Nodule of liver
- Parasitic infection causing myelitis
- Periportal fibrosis
- Periurethral abscess
- Pneumonia caused by Schistosoma mansoni
- Pneumonia due to parasitic infestation
- Pulmonary arterial hypertension associated with schistosomiasis
- Pulmonary schistosomiasis
- Schistosoma encephalomyelitis
- Schistosoma mansoni infection
- Schistosomal granuloma of central nervous system
- Schistosomal hepatomegaly
- Schistosomal periurethral abscess
- Schistosomal pigment deposition
- Schistosomal splenomegaly
- Schistosomal urethral fistula
- Schistosomiasis of urethra
- Splenic schistosomal giant cell lymphoma
- Splenitis
- Symmer's pipe-stem fibrosis
- Urinary schistosomiasis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B65.9: its own notes plus those printed at B65 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- snail fever
- diseases generally recognized as communicable or transmissible
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B65.9, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming B65.9: they are not reported together with it, unless the two conditions are unrelated.
Code First 11
These codes say to code first a condition named in the note, and B65.9 is one of the conditions named.
- G07 Intracranial and intraspinal abscess and granuloma in diseases classified elsewhereschistosomiasis granuloma of brain (B65.-) names B65.-, which includes this code
- M63 Disorders of muscle in diseases classified elsewhereschistosomiasis (B65.-) names B65.-, which includes this code
- D77 Other disorders of blood and blood-forming organs in diseases classified elsewhere
- I52 Other heart disorders in diseases classified elsewhere
- J17 Pneumonia in diseases classified elsewhere
- J99 Respiratory disorders in diseases classified elsewhere
- K67 Disorders of peritoneum in infectious diseases classified elsewhere
- K77 Liver disorders in diseases classified elsewhere
- N22 Calculus of urinary tract in diseases classified elsewhere
- N29 Other disorders of kidney and ureter in diseases classified elsewhere
- N33 Bladder disorders in diseases classified elsewhere
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Bilharziasis See Also: Schistosomiasis;
lipemia B65.9
piarhemia B65.9
pulmonary NOS B65.9
pneumonia B65.9
Disease, diseased See Also: Syndrome;
Disorder (of) See Also: Disease;
schistosomiasis B65.9
schistosomiasis B65.9
hemic B65.9
Glomerulonephritis See Also: Nephritis; N05.9
bilharziasis B65.9
schistosomiasis B65.9
Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
Schistosoma B65.9
bilharziasis B65.9
schistosomiasis B65.9
Schistosomiasis B65.9
with muscle disorder B65.9
ankle B65.9
foot B65.9
forearm B65.9
hand B65.9
lower leg B65.9
multiple sites B65.9
pelvic region B65.9
shoulder region B65.9
specified site NEC B65.9
thigh B65.9
upper arm B65.9
lung NEC B65.9
pneumonia B65.9
pulmonary NEC B65.9
pneumonia B65.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.
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 B65.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B65.9Overview
What is the ICD-10 code for schistosomiasis, unspecified?
The ICD-10-CM code for schistosomiasis, unspecified is B65.9 (sometimes written as B659). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B65.9 (Schistosomiasis [bilharziasis]) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report schistosomiasis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B65.9 group to?
When schistosomiasis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 869, 868, with relative weights from 0.6784 to 2.1855 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B65.9 a CC or MCC?
CMS lists B65.9 as a CC (complication or comorbidity) for FY 2027. 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 B65.9?
Under the General Equivalence Mappings, schistosomiasis, unspecified converts to ICD-9-CM 120.9 (schistosomiasis NOS). The mapping is a direct match.
