2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 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. 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 the other POA exempt codes in Encounters for other specific health care (Z40-Z53).

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z53.33: its own notes plus those printed at block Z40-Z53 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

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 Z40-Z53 Encounters for other specific health care applies to 164 codes
  • follow-up examination for medical surveillance after treatment (Z08-Z09)

Notes

General instructions on how these codes are used.

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.

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 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 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z53.33Overview

What is the ICD-10 code for arthroscopic surgical procedure converted to open procedure?

The ICD-10-CM code for arthroscopic surgical procedure converted to open procedure is Z53.33 (sometimes written as Z5333). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does Z53.33 group to?

On inpatient claims, arthroscopic surgical procedure converted to open procedure 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 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. The code appears in the Encounters for other specific health care (Z40-Z53) range of the CMS exempt list.