2026 ICD-10-CM Diagnosis Code Z11.6Encounter for screening for other protozoal diseases and helminthiases
Z11.6 is a billable ICD-10-CM diagnosis code for encounter for screening for other protozoal diseases and helminthiases. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as toxoplasma gondii not detected. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Exposure, encounters, screening or contact with infectious disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z11.6.
Present on Admission (POA)Billing
Z11.6 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Toxoplasma gondii not detected
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- encounter for screening for protozoal intestinal disease Z11.0
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Screening (for) - Z13.9
- Chagas' - Z11.6
- intestinal - Z11.0
- specified NEC - Z11.6
- protozoal - Z11.6
- filariasis - Z11.6
- helminthiasis (intestinal) - Z11.6
- helminthiasis - Z11.6
- leishmaniasis - Z11.6
- malaria - Z11.6
- protozoal disease - Z11.6
- schistosomiasis - Z11.6
- sleeping sickness - Z11.6
- trypanosomiasis - Z11.6
- worms, intestinal - Z11.6
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Screening(for)
- disease or disorder
- Chagas'
- Screening(for)
- disease or disorder
- infection
- intestinal
- specified NEC
- Screening(for)
- disease or disorder
- protozoal
- Screening(for)
- filariasis
- Screening(for)
- helminthiasis (intestinal)
- Screening(for)
- intestinal
- helminthiasis
- Screening(for)
- leishmaniasis
- Screening(for)
- malaria
- Screening(for)
- protozoal disease
- Screening(for)
- schistosomiasis
- Screening(for)
- sleeping sickness
- Screening(for)
- trypanosomiasis
- Screening(for)
- worms, intestinal
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Health Screening
Screenings are tests that look for diseases before you have symptoms. Screening tests can find diseases early, when they're easier to treat. You can get some screenings in your doctor's office. Others need special equipment, so you may need to go to a different office or clinic.
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Convert Z11.6 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z11.6Overview
Is Z11.6 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report encounter for screening for other protozoal diseases and helminthiases on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z11.6 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for screening for other protozoal diseases and helminthiases describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z11.6 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for encounter for screening for other protozoal diseases and helminthiases on inpatient claims.
What is the ICD-9 equivalent of Z11.6?
Under the General Equivalence Mappings, encounter for screening for other protozoal diseases and helminthiases converts to ICD-9-CM V75.1 (screening for malaria), V75.2 (screen for leishmaniasis), and V75.3 (screen-trypanosomiasis). The mapping is approximate, so confirm the match fits the documentation.
