2027 ICD-10-CM Diagnosis Code B44Aspergillosis

ICD-10-CM Codes›A00–B99›B35-B49›B44

ICD-10-CM B44
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B44 is a non-billable ICD-10-CM category code for aspergillosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B44.0, B44.1, B44.2, and B44.7.

Code Identity

ICD-10-CM Code
B44
Billable Status
No — Non-Billable Category
Code Describes
Aspergillosis
Short Description
Aspergillosis
Same as the full description in the CMS dataset.
Chapter
B35-B49
Mycoses

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB44Aspergillosis
This CodeB44Aspergillosis

Specific Coding for AspergillosisOverview

Non-specific codes like B44 require more characters. Use one of these billable codes instead:

  • Use B44.0 for Invasive pulmonary aspergillosis

  • Use B44.1 for Other pulmonary aspergillosis

  • Use B44.2 for Tonsillar aspergillosis

  • Use B44.7 for Disseminated aspergillosis

  • B44.8 for Other forms of aspergillosis

  • Use B44.81 for Allergic bronchopulmonary aspergillosis

  • Use B44.89 for Other forms of aspergillosis

  • Use B44.9 for Aspergillosis, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B44: its own notes plus those printed at block B35-B49 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.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • 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.

From Block B35-B49 Mycoses applies to 104 codes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • 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.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

  • if applicable:
  • aspergilloma of other site - code to chronic infection of site
  • pulmonary aspergilloma (J4B)
  • pulmonary aspergillosis fungal ball (J4B)
  • pulmonary mycetoma (J4B)
  • sinus aspergilloma (J32.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B44, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming B44: its condition is not part of those codes, and both may be reported when the patient has both.

  • J82 Pulmonary eosinophilia, not elsewhere classified
    pulmonary eosinophilia due to aspergillosis (B44.-)

Code Also 1

These codes say B44 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • J4B Pulmonary mycetoma
    aspergillosis (B44.-)

Clinical InformationClinical

  • Aspergillosis

    infections with fungi of the genus aspergillus.

Patient EducationClinical

Aspergillosis

Aspergillosis is a disease caused by a fungus (or mold) called Aspergillus. The fungus is very common in both indoors and outdoors. Most people breathe in the spores of the fungus every day without being affected. But some people get the disease. It usually occurs in people with lung diseases or weakened immune systems.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B44Overview

What is the ICD-10 code for aspergillosis?

B44 is the ICD-10-CM category for aspergillosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is B44 (Aspergillosis) a billable code?

No. This is a category header that groups the codes for aspergillosis, and headers cannot be submitted on claims. Claims for aspergillosis need a more specific code from this category, such as B44.0, B44.1, and B44.2.