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Z09 vs Z53.33

Z09 (Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm) compared with Z53.33 (Arthroscopic surgical procedure converted to open procedure), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Relationship

Informational

Excludes2 relationship

Z53.33
Arthroscopic surgical procedure converted to open procedure
↔
Z09
Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm

Distinct conditions — both may be reported.

“follow-up examination for medical surveillance after treatment (Z08-Z09)”

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source: CMS ICD-10-CM tabular instructional notes

Can these codes be reported together?

Yes, when both are documented. Z53.33 carries an Excludes2 note covering Z09: “follow-up examination for medical surveillance after treatment (Z08-Z09)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

Z09Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasmZ53.33Arthroscopic surgical procedure converted to open procedure
Billing statusBillableBillable
ClassificationZ00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
DefinitionEncounter for follow-up examination after completed treatment for conditions other than malignant neoplasm is a billable ICD-10-CM diagnosis code (Z09).Arthroscopic surgical procedure converted to open procedure is a billable ICD-10-CM diagnosis code (Z53.33).
Includes
Medical surveillance following completed treatment
—
Use additional code
code to identify any applicable history of disease code (Z86.-, Z87.-)
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources