ICD-10-CM 2027
ICD-10 code for parasitic disease sequelae
From the official ICD-10-CM alphabetic index entry “Sequelae (of) › parasitic disease”. Page updated September 29, 2026.
About coding parasitic disease sequelae
The ICD-10-CM code for parasitic disease sequelae is B94.9 (Sequelae of unspecified infectious and parasitic disease).
Within B94, choose B94.9 (unspecified infectious and parasitic disease) only when documentation doesn't support a more specific option: trachoma (B94.0), viral encephalitis (B94.1), viral hepatitis (B94.2) and other specified infectious and parasitic diseases (B94.8).
The conditions in its Excludes2 note aren't part of B94.9, but may be coded alongside it if the patient has both: post COVID-19 condition (U09.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about parasitic disease sequelae ICD-10 codes
What is the ICD-10 code for parasitic disease sequelae?
- B94.9 — Sequelae of unspecified infectious and parasitic disease.
Is B94.9 billable?
- Yes. B94.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B94.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B94.9 as a principal diagnosis.
Is B94.9 a CC or MCC?
- No. B94.9 is neither a CC nor an MCC under MS-DRG v44.0.