2026 ICD-10-CM Diagnosis Code B44.89Other forms of aspergillosis

ICD-10-CM Codes›A00–B99›B35-B49›B44

ICD-10-CM B44.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B44.89 is a billable ICD-10-CM diagnosis code for other forms of aspergillosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.

Code Identity

ICD-10-CM Code
B44.89
Billable Status
Yes — Valid for Submission
Code Describes
Other forms of aspergillosis
Short Description
Other forms of aspergillosis
Same as the full description in the CMS dataset.
Parent Code
B44.8
Other forms of aspergillosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB44Aspergillosis
This CodeB44.89Other forms of aspergillosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute fungal otitis externa
  • Acute infective otitis externa
  • Aspergillosis enteritis of intestine
  • Aspergillosis enteritis of small intestine
  • Aspergillus colitis
  • Aspergillus endophthalmitis
  • Aspergillus esophagitis
  • Aspergillus meningitis
  • Aspergillus mycotic cerebral aneurysm
  • Aspergillus otomycosis
  • Cerebral abscess
  • Cerebral abscess caused by Aspergillus
  • Cerebrovascular accident with intracranial hemorrhage
  • Chronic aspergillosis of paranasal sinus
  • Chronic suppurative otitis media caused by Aspergillus
  • Cutaneous aspergillosis
  • Endogenous Aspergillus endophthalmitis
  • Endogenous endophthalmitis
  • Endogenous fungal endophthalmitis
  • Fungal colitis
  • Fungal endophthalmitis
  • Fungal esophagitis
  • Fungal infection of cerebrum
  • Fungal meningitis
  • Fungal myocarditis
  • Hemorrhagic cerebral infarction
  • Hemorrhagic cerebral infarction caused by Aspergillus
  • Hemorrhagic infarction
  • Invasive aspergillosis
  • Invasive aspergillosis of brain
  • Invasive aspergillosis of digestive tract
  • Invasive aural aspergillosis
  • Invasive cardiac aspergillosis
  • Invasive cutaneous aspergillosis
  • Invasive ocular aspergillosis
  • Myelitis caused by Aspergillus
  • Myelitis caused by fungus
  • Myocarditis caused by Aspergillus
  • Onychomycosis caused by Aspergillus
  • Pleural aspergillosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Aspergillosis(with pneumonia)
      • specified NEC
    • Ear
      • tropical NEC
        • in
          • aspergillosis
    • Mycosis, mycotic
      • ear
        • in
          • aspergillosis
    • Otitis(acute)
      • externa
        • in (due to)
          • aspergillosis
    • Otitis(acute)
      • externa
        • mycotic NEC
          • in
            • aspergillosis
    • Otitis(acute)
      • externa
        • tropical NEC
          • in
            • aspergillosis
    • Otomycosis(diffuse) NEC
      • in
        • aspergillosis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF004
Fungal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Fungal Esophagitis

    infection of the esophagus caused by fungi, most often candida albicans and candida tropicalis. it usually affects patients with immunodeficiency disorders or diabetes mellitus. symptoms include dysphagia and pain on swallowing.

  • Fungal Endophthalmitis

    inflammation of the lining of the ocular cavities, which results from a fungal infection.

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.

Convert B44.89 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
117.3 Aspergillosis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B44.89Overview

Is B44.89 (Other forms of aspergillosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other forms of aspergillosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B44.89 group to?

When other forms of aspergillosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B44.89?

Under the General Equivalence Mappings, other forms of aspergillosis converts to ICD-9-CM 117.3 (aspergillosis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.