Is ICD-10-CM code B81 billable?

No, B81 (Other intestinal helminthiases, not elsewhere classified) 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 B81 belong to?

B81 belongs to Chapter 1 of the ICD-10-CM tabular list: A00–B99 (Certain Infectious and Parasitic Diseases).

B81Not billable, use a more specific code below

Other intestinal helminthiases, not elsewhere classified

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

6 billable codes under B81: 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

Excludes1: not coded here, use a different code

angiostrongyliasis due to:
Angiostrongylus cantonensis (B83.2)
Parastrongylus cantonensis (B83.2)

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 B81

B81 can't be used on a claim. Pick a billable code below; grey headings group them.

B81 MS-DRGs

As the principal diagnosis, the billable codes under B81 group to MS-DRG 391, 392, 867, 868, or 869 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC (5 of 6 codes)
DRG 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC (5 of 6 codes)
DRG 867 Other Infectious and Parasitic Diseases Diagnoses with MCC (1 of 6 codes)
DRG 868 Other Infectious and Parasitic Diseases Diagnoses with CC (1 of 6 codes)
DRG 869 Other Infectious and Parasitic Diseases Diagnoses without CC/MCC (1 of 6 codes)

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.