A07.3 Isosporiasis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Infection due to Isospora belli and Isospora hominis
• Intestinal coccidiosis
• Isosporosis

MS-DRG index

Defines the logic of DRG(s) 371-373 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 007.2 Coccidiosis

Code annotations containing back-references to A07.3

Back-references to A07.3

• Type 1 Excludes: B60 Other protozoal diseases, not elsewhere classified ("isosporiasis (A07.3)")

Back-references to A07

• Type 1 Excludes: A06 Amebiasis ("other protozoal intestinal diseases (A07.-)")
• Type 2 Excludes: P37 Other congenital infectious and parasitic diseases ("infectious neonatal diarrhea (A00-A09)")

Diagnosis Index entries for A07.3

• Coccidiosis (intestinal)
• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › coccidial
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › coccidial
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › coccidial
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › coccidial
• Infection, infected, infective (opportunistic) › Isospora belli or hominis
• Infestation › coccidial
• Isosporiasis, isosporosis

Nearby codes

• A07 Other protozoal intestinal diseases
• A07.0 Balantidiasis
• A07.1 Giardiasis [lambliasis]
• A07.2 Cryptosporidiosis
• A07.3 Isosporiasis (this code)
• A07.4 Cyclosporiasis
• A07.8 Other specified protozoal intestinal diseases
• A07.9 Protozoal intestinal disease, unspecified