A22.1 Pulmonary anthrax

The ICD-10-CM code for Pulmonary anthrax is A22.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A20-A28: Certain zoonotic bacterial diseases (A20-A28)

Category A22

7 codes (6 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A22.1:

• Ragsorter's disease
• Ragpicker's disease
• Woolsorter's disease
• Anthrax › with pneumonia
• Anthrax › pulmonary
• Anthrax › inhalation
• Anthrax › respiratory
• Disease, diseased › ragpicker's or ragsorter's

Inclusion Terms

• Inhalation anthrax
• Ragpicker's disease
• Woolsorter's disease

U.S. Hospital Utilization

A22.1 appeared in too few sampled U.S. inpatient stays in 2021 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)