A23.1 Brucellosis due to Brucella abortus

Billable ICD-10-CM code, FY2026.

Applies from A23 Brucellosis

Includes

• Malta fever
• Mediterranean fever
• undulant fever

MS-DRG index

Defines the logic of DRG(s) 867-869 in MDC 18.

Approximate ICD-9-CM (GEMs)

• 023.1 Brucella abortus

Code annotations containing back-references to A23.1

Back-references to A23.1

• Code First: N16 Renal tubulo-interstitial disorders in diseases classified elsewhere ("brucellosis (A23.0-A23.9)")

Back-references to A23

• Code First: M49 Spondylopathies in diseases classified elsewhere ("brucellosis (A23.-)")

Diagnosis Index entries for A23.1

• Abortus fever
• Bacillus › abortus infection
• Bang's disease (brucella abortus)
• Brucellosis (infection) › abortus
• Disease, diseased › Bang's (brucella abortus)
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › abortus
• Infection, infected, infective (opportunistic) › Bacillus › abortus
• Infection, infected, infective (opportunistic) › Brucella › abortus

Nearby codes

• A23 Brucellosis
• A23.0 Brucellosis due to Brucella melitensis
• A23.1 Brucellosis due to Brucella abortus (this code)
• A23.2 Brucellosis due to Brucella suis
• A23.3 Brucellosis due to Brucella canis
• A23.8 Other brucellosis
• A23.9 Brucellosis, unspecified