2026 ICD-10-CM Diagnosis Code Z01.818Encounter for other preprocedural examination

ICD-10-CM Codes›Z00–Z99›Z00-Z13›Z01

ICD-10-CM Z01.818
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z01.818 is a billable ICD-10-CM diagnosis code for encounter for other preprocedural examination. 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 preprocedural examination done. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Medical examination/evaluation.

Code Identity

ICD-10-CM Code
Z01.818
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for other preprocedural examination
Short Description
Encounter for other preprocedural examination
Same as the full description in the CMS dataset.
Parent Code
Z01.81
Encounter for preprocedural examinations

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ00-Z13Persons encountering health services for examinations
CategoryZ01Encounter for other special examination without complaint, suspected or reported diagnosis
This CodeZ01.818Encounter for other preprocedural examination

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z01.818.

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

Z01.818 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.

  • Preprocedural examination done

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Encounter for preprocedural examination NOS
  • Encounter for examinations prior to antineoplastic chemotherapy

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.

    • Examination(for) (following) (general) (of) (routine)
      • medical (adult) (for) (of)
        • pre-procedural
          • specified NEC
    • Examination(for) (following) (general) (of) (routine)
      • pre-chemotherapy (antineoplastic)
    • Examination(for) (following) (general) (of) (routine)
      • pre-procedural (pre-operative)
        • specified NEC
    • Examination(for) (following) (general) (of) (routine)
      • prior to chemotherapy (antineoplastic)

Clinical ClassificationClinical

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

CCSR FAC014
Medical examination/evaluation
Default principal diagnosis: inpatient No · outpatient Yes

Convert Z01.818 to ICD-9-CMHistory

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

ICD-9-CM
V72.83 Oth spcf preop exam
Approximate The match is approximate rather than exact.
ICD-9-CM
V72.84 Preop exam unspcf
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z01.818Overview

Is Z01.818 (Encounter for preprocedural examinations) a billable code?

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

Can Z01.818 be a principal diagnosis?

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

Is Z01.818 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 other preprocedural examination on inpatient claims.

What is the ICD-9 equivalent of Z01.818?

Under the General Equivalence Mappings, encounter for other preprocedural examination converts to ICD-9-CM V72.83 (oth spcf preop exam) and V72.84 (preop exam unspcf). The mapping is approximate, so confirm the match fits the documentation.