ICD-10-CM 2027 diagnosis code

B44Aspergillosis

Not billable — use a more specific code

B44 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B44

B44 is the ICD-10-CM diagnosis code for aspergillosis. It belongs to block B35-B49 (mycoses) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B44.0 (aspergillosis), B44.1 (aspergillosis), B44.2 (aspergillosis), B44.7 (aspergillosis), B44.8 (aspergillosis) and B44.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B44

Coding notes

Code alsoTwo codes may be needed; sequencing depends on circumstances

, 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.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to B44.

Broader instructions also apply from B35-B49 Mycoses and Chapter 1: Certain infectious and parasitic diseases.

Codes whose notes reference B44

J4BCode also
J82Excludes2

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B44

Is B44 billable?: No. B44 is a header code. Report one of its more specific subcodes instead.