2026 ICD-10-CM Diagnosis Code Z53.33Arthroscopic surgical procedure converted to open procedure

ICD-10-CM Codes›Z00–Z99›Z40-Z53›Z53

ICD-10-CM Z53.33
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z53.33 is a billable ICD-10-CM diagnosis code for arthroscopic surgical procedure converted to open procedure. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.

Code Identity

ICD-10-CM Code
Z53.33
Billable Status
Yes — Valid for Submission
Code Describes
Arthroscopic surgical procedure converted to open procedure
Short Description
Arthroscopic surgical procedure converted to open procedure
Same as the full description in the CMS dataset.
Parent Code
Z53.3
Procedure converted to open procedure

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ40-Z53Encounters for other specific health care
CategoryZ53Persons encountering health services for specific procedures and treatment, not carried out
This CodeZ53.33Arthroscopic surgical procedure converted to open procedure

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z53.33.

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

Z53.33 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.

    • Procedure(surgical)
      • converted
        • arthroscopic to open

Clinical ClassificationClinical

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

CCSR FAC025
Other specified status
Default principal diagnosis: inpatient No · outpatient Yes

Convert Z53.33 to ICD-9-CMHistory

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

ICD-9-CM
V64.43 Arthroscopc conv to open
Exact Match The mapping is direct, with no qualifiers.

Code History & ChangesHistory

Replacement Z53.33 replaces the following previously assigned code(s):

  • Z53.8 - Procedure and treatment not carried out for other reasons
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 Z53.33Overview

Is Z53.33 (Procedure converted to open procedure) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report arthroscopic surgical procedure converted to open procedure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z53.33 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because arthroscopic surgical procedure converted to open procedure describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z53.33 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 arthroscopic surgical procedure converted to open procedure on inpatient claims.

What is the ICD-9 equivalent of Z53.33?

Under the General Equivalence Mappings, arthroscopic surgical procedure converted to open procedure converts to ICD-9-CM V64.43 (arthroscopc conv to open). The mapping is a direct match.