What does ICD-10 code B81.3 mean?

ICD-10 code B81.3 is the standardized code used for intestinal angiostrongyliasis in medical records and coding systems.

When is ICD-10 code B81.3 used?

Doctors, hospitals, and insurers may use ICD-10 code B81.3 when recording intestinal angiostrongyliasis in a standardized format.

Does ICD-10 code B81.3 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10BillableValid for clinical use

ICD-10 Code B81.3: Intestinal angiostrongyliasis

Name: ICD-10 Code B81.3: Intestinal angiostrongyliasis
Creator: HealthAssure Clinical Team
Published: 2026-05-26T09:40:13.196Z

B81.3 is a billable ICD-10 diagnosis code used to classify Intestinal angiostrongyliasis in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

When is it used?

May be used when a clinician documents intestinal angiostrongyliasis in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter

1Certain infectious and parasitic diseases (A00-B99)

block

B65-B83Helminthiases

Official coding notes

Inclusion terms

Angiostrongyliasis due to:
Angiostrongylus costaricensis
Parastrongylus costaricensis

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Infectious Disease SpecialistGeneral PhysicianGastroenterologist

Sibling codes

B81.0Anisakiasisbillable B81.1Intestinal capillariasisbillable B81.2Trichostrongyliasisbillable B81.4Mixed intestinal helminthiasesbillable B81.8Other specified intestinal helminthiasesbillable

Mapped diagnoses and classifications

SNOMED_CT 866078000high

Infection caused by Angiostrongylus costaricensis

Source: SNOMED International ICD-10 map

SNOMED_CT 187187002high

Intestinal angiostrongyliasis

Source: SNOMED International ICD-10 map

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.

Legacy codes

B81.3

Common synonyms

Intestinal angiostrongyliasis

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.