Z09 — Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
Is Z09 billable?
Yes — Z09 is billable for FY2027. Z09 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z09 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z09 at a glance
| Code | Z09 |
|---|---|
| Description | Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z09?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z09 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z09 group to?
Z09 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
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How is Z09 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z09. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Admission › follow-up examination (for)
- Examination › follow-up (for) (following) (general) (of) (routine)
- Examination › following › treatment (for) (following) (general) (of) (routine)
- Examination › follow-up › chemotherapy NEC (for) (following) (general) (of) (routine)
- Examination › follow-up › fracture (for) (following) (general) (of) (routine)
- Examination › follow-up › psychotherapy (for) (following) (general) (of) (routine)
- Examination › follow-up › radiotherapy NEC (for) (following) (general) (of) (routine)
- Examination › follow-up › surgery NEC (for) (following) (general) (of) (routine)
- Examination › psychiatric NEC › follow-up not needing further care (for) (following) (general) (of) (routine)
- Examination › following › treatment › combined NEC (for) (following) (general) (of) (routine)
- Examination › following › treatment › mental disorder (for) (following) (general) (of) (routine)
- Examination › following › treatment › specified condition NEC (for) (following) (general) (of) (routine)
Excludes1 — never code together
The conditions below can never be reported together with Z09 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code
Report an additional code alongside Z09 to fully describe the condition. Z09 is sequenced first.
Inclusion terms
Alternative wording in documentation that is classified to Z09.
- Medical surveillance following completed treatment
Excludes2 — not included here — inherited from Z00-Z13
The conditions below are not part of Z09, but a patient may have both at the same time. When documentation supports it, Z09 and the excluded code may both be reported.
How long has Z09 existed?
Z09 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with Z09?
ICD-10-CM declares these codes mutually exclusive with Z09 — exactly one of each pair can be correct for a given encounter.