ICD-10-CM 2027
ICD-10 code for Loa loa infection
From the official ICD-10-CM alphabetic index entry “Infection, infected, infective (opportunistic) › Loa loa”. Page updated September 29, 2026.
About coding Loa loa infection
The ICD-10-CM code for Loa loa infection is B74.3 (Loiasis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B74.3.
Within B74 (filariasis), B74.3 is specifically for Loiasis. Related codes cover due to Wuchereria bancrofti (B74.0), due to Brugia malayi (B74.1), due to Brugia timori (B74.2), Mansonelliasis (B74.4), other filariases (B74.8) and unspecified (B74.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235) and DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Loa loa infection codes (official index)
Common questions about Loa loa infection ICD-10 codes
What is the ICD-10 code for Loa loa infection?
- B74.3 — Loiasis. More specific codes apply when the documentation supports them: B74.3, B74.3.
What is the ICD-10 code for eyelid loa loa infection?
- B74.3 — Loiasis.
Is B74.3 billable?
- Yes. B74.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B74.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B74.3 as a principal diagnosis.
Is B74.3 a CC or MCC?
- B74.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.