What does ICD-10 code B44 mean?

ICD-10 code B44 is the standardized code used for aspergillosis in medical records and coding systems.

When is ICD-10 code B44 used?

Doctors, hospitals, and insurers may use ICD-10 code B44 when recording aspergillosis in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code B44 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.

ICD10

ICD-10 Code B44: Aspergillosis

Name: ICD-10 Code B44: Aspergillosis
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:01:21.480Z

B44 is an ICD-10 diagnosis entry used to group records related to Aspergillosis. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. 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 aspergillosis in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

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.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

1Certain infectious and parasitic diseases (A00-B99)

block

B35-B49Mycoses

currentB35-B49

Official coding notes

Includes

aspergilloma

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Infectious Disease SpecialistGeneral Physician

Sibling codes

B35Dermatophytosis B36Other superficial mycoses B37Candidiasis B38Coccidioidomycosis B39Histoplasmosis B40Blastomycosis B41Paracoccidioidomycosis B42Sporotrichosis B43Chromomycosis and pheomycotic abscess B45Cryptococcosis B46Zygomycosis B47Mycetoma B48Other mycoses, not elsewhere classified B49Unspecified mycosisbillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

B44

Replacement codes

B44.0 — Invasive pulmonary aspergillosisB44.1 — Other pulmonary aspergillosisB44.2 — Tonsillar aspergillosisB44.7 — Disseminated aspergillosisB44.9 — Aspergillosis, unspecified

Common synonyms

Aspergillosis

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.