2026 ICD-10-CM Diagnosis Code Z36.85Encounter for antenatal screening for Streptococcus B

ICD-10-CM Codes›Z00–Z99›Z30-Z39›Z36

ICD-10-CM Z36.85
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z36.85 is a billable ICD-10-CM diagnosis code for encounter for antenatal screening for Streptococcus B. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64) and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Antenatal screening.

Code Identity

ICD-10-CM Code
Z36.85
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for antenatal screening for Streptococcus B
Short Description
Encounter for antenatal screening for Streptococcus B
Same as the full description in the CMS dataset.
Parent Code
Z36.8
Encounter for other antenatal screening

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ30-Z39Persons encountering health services in circumstances related to reproduction
CategoryZ36Encounter for antenatal screening of mother
This CodeZ36.85Encounter for antenatal screening for Streptococcus B

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z36.85.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Present on Admission (POA)Billing

Z36.85 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Encounter(with health service) (for)
      • antenatal screening
        • Streptococcus B

Clinical ClassificationClinical

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

CCSR PRG001
Antenatal screening
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Strep B Test

Strep B, also known as group B strep (GBS), is a type of bacteria commonly found in the digestive tract, urinary tract, and genital area. Many healthy people have GBS bacteria in their bodies.

Read the full article at MedlinePlus

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

Convert Z36.85 to ICD-9-CMHistory

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

ICD-9-CM
V28.6 Antenatal screen strep b
Exact Match The mapping is direct, with no qualifiers.

Code History & ChangesHistory

Replacement Z36.85 replaces the following previously assigned code(s):

  • Z36 - Encounter for antenatal screening of mother
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z36.85Overview

Is Z36.85 (Encounter for other antenatal screening) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for antenatal screening for Streptococcus B on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can Z36.85 be reported for?

The Medicare Code Editor checks encounter for antenatal screening for Streptococcus B against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

Is Z36.85 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 antenatal screening for Streptococcus B on inpatient claims.

What is the ICD-9 equivalent of Z36.85?

Under the General Equivalence Mappings, encounter for antenatal screening for Streptococcus B converts to ICD-9-CM V28.6 (antenatal screen strep b). The mapping is a direct match.