Z11.6Encounter for screening for other protozoal diseases and helminthiases

Z11.6 is the ICD-10-CM diagnosis code for encounter for screening for other protozoal diseases and helminthiases. It belongs to category Z11 (encounter for screening for infectious and parasitic diseases), block Z00-Z13 (persons encountering health services for examinations) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

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.

In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as V75.1 (screening examination for malaria), V75.2 (screening examination for leishmaniasis), V75.3 (screening examination for trypanosomiasis) and 3 more.