2027 ICD-10-CM Diagnosis Code Z11.2Encounter for screening for other bacterial diseases

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z11

ICD-10-CM Z11.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z11.2 is a billable ICD-10-CM diagnosis code for encounter for screening for other bacterial diseases. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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 Lyme not detected by enzyme-linked immunosorbent assay. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Exposure, encounters, screening or contact with infectious disease.

Code Identity

ICD-10-CM Code
Z11.2
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for screening for other bacterial diseases
Short Description
Encounter for screening for other bacterial diseases
Same as the full description in the CMS dataset.
Parent Code
Z11
Encounter for screening for infectious and parasitic diseases

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 CodeZ11.2Encounter for screening for other bacterial diseases

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z11.2.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z11.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons encountering health services for examinations (Z00-Z13).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Lyme not detected by enzyme-linked immunosorbent assay
  • Lyme not detected by immunoblot

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z11.2: its own notes plus those printed at Z11, block Z00-Z13, and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Excludes1

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

From Z11 Encounter for screening for infectious and parasitic diseases applies to 12 codes
  • 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 Z11.2, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming Z11.2: 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) names Z11-Z13, which includes this code
  • Z01 Encounter for other special examination without complaint, suspected or reported diagnosis
    screening examinations (Z11-Z13) names Z11-Z13, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC016
Exposure, encounters, screening or contact with infectious disease
Default principal diagnosis: inpatient No · outpatient Yes

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.

Convert Z11.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V74.2 Screening for leprosy
Approximate The match is approximate rather than exact.
ICD-9-CM
V74.3 Screening for diphtheria
Approximate The match is approximate rather than exact.
ICD-9-CM
V74.8 Screen-bacterial dis NEC
Approximate The match is approximate rather than exact.

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 Z11.2Overview

What is the ICD-10 code for encounter for screening for other bacterial diseases?

The ICD-10-CM code for encounter for screening for other bacterial diseases is Z11.2 (sometimes written as Z112). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Z11.2 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for screening for other bacterial diseases on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Z11.2 group to?

On inpatient claims, encounter for screening for other bacterial diseases maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

Can Z11.2 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for screening for other bacterial diseases describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z11.2 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 bacterial diseases on inpatient claims. The code appears in the Persons encountering health services for examinations (Z00-Z13) range of the CMS exempt list.