ICD-10-CM 2027
ICD-10 code for protozoal disease screening
Encounter for screening for other protozoal diseases and helminthiases
From the official ICD-10-CM alphabetic index entry “Screening (for) › protozoal disease”. Page updated September 29, 2026.
About coding protozoal disease screening
The ICD-10-CM code for protozoal disease screening is Z11.6 (Encounter for screening for other protozoal diseases and helminthiases). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Z11.6.
Within Z11, choose Z11.6 (screening for other protozoal diseases and helminthiases) only when documentation doesn't support a more specific option: screening for intestinal infectious diseases (Z11.0), screening for respiratory tuberculosis (Z11.1), screening for other bacterial diseases (Z11.2), screening for infections with a predominantly sexual mode of transmission (Z11.3), screening for human immunodeficiency virus [HIV] (Z11.4), screening for other viral diseases (Z11.5), testing for latent tuberculosis infection (Z11.7), screening for other infectious and parasitic diseases (Z11.8) and 1 more.
The conditions in its Excludes2 note aren't part of Z11.6, but may be coded alongside it if the patient has both: encounter for screening for protozoal intestinal disease (Z11.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific protozoal disease screening codes (official index)
- intestinal Z11.0 — Encounter for screening for intestinal infectious diseases
Common questions about protozoal disease screening ICD-10 codes
What is the ICD-10 code for protozoal disease screening?
- Z11.6 — Encounter for screening for other protozoal diseases and helminthiases. More specific codes apply when the documentation supports them: Z11.0.
What is the ICD-10 code for intestinal protozoal disease screening?
- Z11.0 — Encounter for screening for intestinal infectious diseases.
Is Z11.6 billable?
- Yes. Z11.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z11.6 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z11.6 a CC or MCC?
- No. Z11.6 is neither a CC nor an MCC under MS-DRG v44.0.