2027 ICD-10-CM Diagnosis Code Z11Encounter for screening for infectious and parasitic diseases

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z11

ICD-10-CM Z11
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z11 is a non-billable ICD-10-CM category code for encounter for screening for infectious and parasitic diseases, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z11.0, Z11.1, Z11.2, and Z11.3.

Code Identity

ICD-10-CM Code
Z11
Billable Status
No — Non-Billable Category
Code Describes
Encounter for screening for infectious and parasitic diseases
Short Description
Encounter for screening for infec/parastc diseases
Chapter
Z00-Z13
Persons encountering health services for examinations

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ00-Z13Persons encountering health services for examinations
CategoryZ11Encounter for screening for infectious and parasitic diseases
This CodeZ11Encounter for screening for infectious and parasitic diseases

Specific Coding for Encounter for screening for infec/parastc diseasesOverview

Non-specific codes like Z11 require more characters. Use one of these billable codes instead:

  • Use Z11.0 for Encounter for screening for intestinal infectious diseases

  • Use Z11.1 for Encounter for screening for respiratory tuberculosis

  • Use Z11.2 for Encounter for screening for other bacterial diseases

  • Use Z11.3 for Encounter for screening for infections with a predominantly sexual mode of transmission

  • Use Z11.4 for Encounter for screening for human immunodeficiency virus [HIV]

  • Z11.5 for Encounter for screening for other viral diseases

  • Use Z11.51 for Encounter for screening for human papillomavirus (HPV)

  • Use Z11.52 for Encounter for screening for COVID-19

  • Use Z11.59 for Encounter for screening for other viral diseases

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

  • Use Z11.7 for Encounter for testing for latent tuberculosis infection

  • Use Z11.8 for Encounter for screening for other infectious and parasitic diseases

  • Use Z11.9 for Encounter for screening for infectious and parasitic diseases, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z11: its own notes plus those printed at block Z00-Z13 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Screening is the testing for disease or disease precursors in asymptomatic individuals so that early detection and treatment can be provided for those who test positive for the disease.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • encounter for diagnostic examination-code to sign or symptom

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block Z00-Z13 Persons encountering health services for examinations applies to 156 codes
  • examinations related to pregnancy and reproduction (Z30-Z36, Z39.-)

Notes

General instructions on how these codes are used.

From Block Z00-Z13 Persons encountering health services for examinations applies to 156 codes
  • Nonspecific abnormal findings disclosed at the time of these examinations are classified to categories R70-R94.
From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z11, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming Z11: its condition is not part of those codes, and both may be reported when the patient has both.

  • Z00 Encounter for general examination without complaint, suspected or reported diagnosis
    special screening examinations (Z11-Z13)
  • Z01 Encounter for other special examination without complaint, suspected or reported diagnosis
    screening examinations (Z11-Z13)

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z11Overview

What is the ICD-10 code for encounter for screening for infectious and parasitic diseases?

Z11 is the ICD-10-CM category for encounter for screening for infectious and parasitic diseases, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Z11 a billable code?

No. This is a category header that groups the codes for encounter for screening for infectious and parasitic diseases, and headers cannot be submitted on claims. Claims for encounter for screening for infectious and parasitic diseases need a more specific code from this category, such as Z11.0, Z11.1, and Z11.2.