NPI Atlas

B44 – Aspergillosis

ICD-10-CM 2027 diagnosis code · Mycoses

Non-billable header

ICD-10-CM code B44

Code: B44 (claims format: B44)
Description: Aspergillosis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: B35-B49 Mycoses

Billable codes under B44

B44 is a header code and cannot be used on claims. Choose the most specific code:

B44.0 – Invasive pulmonary aspergillosisBillable
B44.1 – Other pulmonary aspergillosisBillable
B44.2 – Tonsillar aspergillosisBillable
B44.7 – Disseminated aspergillosisBillable
B44.8 – Other forms of aspergillosisHeader (more codes below)
B44.9 – Aspergillosis, unspecifiedBillable

Notes for B44

Code also:

, 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 inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block B35-B49

Excludes2 (not included here):

hypersensitivity pneumonitis due to organic dust (J67.-)
mycosis fungoides (C84.0-)

Frequently asked questions

What is ICD-10 code B44?

B44 is the ICD-10-CM code for aspergillosis, in the block B35-B49 (Mycoses).

Is B44 a billable code?

No. B44 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.