Is ICD-10-CM code B65 billable?

No, B65 (Schistosomiasis [bilharziasis]) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code B65 belong to?

B65 belongs to Chapter 1 of the ICD-10-CM tabular list: A00–B99 (Certain Infectious and Parasitic Diseases).

B65Not billable, use a more specific code below

Schistosomiasis [bilharziasis]

In Helminthiases (B65-B83), chapter 1: Certain Infectious and Parasitic Diseases

6 billable codes under B65: all are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Includes: conditions that are coded here

snail fever

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.

Human Immunodeficiency Virus (HIV) Infections (page 19)
Infectious agents as the cause of diseases classified to other chapters (page 22)
Infections resistant to antibiotics (page 22)
Sepsis, Severe Sepsis, and Septic Shock (page 23)
Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
Zika virus infections (page 28)
Coronavirus infections (page 28)

Read Section I.C.1 (page 19)

All codes under B65

B65 can't be used on a claim. Pick a billable code below; grey headings group them.

B65 MS-DRGs

As the principal diagnosis, the billable codes under B65 group to these 10 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 867 Other Infectious and Parasitic Diseases Diagnoses with MCC (3 of 6 codes)
DRG 868 Other Infectious and Parasitic Diseases Diagnoses with CC (3 of 6 codes)
DRG 869 Other Infectious and Parasitic Diseases Diagnoses without CC/MCC (3 of 6 codes)
DRG 441 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC (1 of 6 codes)
DRG 442 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC (1 of 6 codes)
DRG 443 Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC (1 of 6 codes)
DRG 606 Minor Skin Disorders with MCC (1 of 6 codes)
DRG 607 Minor Skin Disorders without MCC (1 of 6 codes)
DRG 689 Kidney and Urinary Tract Infections with MCC (1 of 6 codes)
DRG 690 Kidney and Urinary Tract Infections without MCC (1 of 6 codes)

Other codes that refer to B65

Notes on these codes point to B65.

G07 Code First: schistosomiasis granuloma of brain (B65.-)
H94.0 Code First: parasitic disease (B65-B89)
I27.21 Code Also: schistosomiasis (B65.-)
M63 Code First: schistosomiasis (B65.-)
N35.1 Excludes1: urethral stricture associated with schistosomiasis (B65.-, N29)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.