2027 ICD-10-CM Diagnosis Code Z09Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
Z09 is a billable ICD-10-CM diagnosis code for encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm. 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 aftercare encounter.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z09.
Present on Admission (POA)Billing
Z09 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons encountering health services for examinations (Z00-Z13).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Chiropody follow-up
- Follow-up
- Follow-up 1 day
- Follow-up 1 month
- Follow-up 1 week
- Follow-up 1 year
- Follow-up 2 weeks
- Follow-up 2-3 days
- Follow-up 2-3 months
- Follow-up 3 weeks
- Follow-up 4-6 days
- Follow-up 4-6 months
- Follow-up 6 months
- Follow-up 6 weeks
- Follow-up 7-11 months
- Fracture therapy follow-up
- Heart failure follow-up
- High risk implant follow-up
- Hypertension monitoring check done
- Hypertension monitoring status
- Hypertension:follow-up default
- Midwife follow up
- Post-discharge follow-up
- Radiotherapy follow-up
- Retinopathy follow up
- Seen in hypertension clinic
- Surgical follow-up
- Surgical follow-up - normal
- Transplant follow-up
- Under follow-up
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z09: its own notes plus those printed at block Z00-Z13 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Medical surveillance following completed treatment
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Notes
General instructions on how these codes are used.
- 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Z09, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming Z09: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming Z09: its condition is not part of those codes, and both may be reported when the patient has both.
- Block Z40-Z53 Encounters for other specific health care
- Z98 Other postprocedural states
Code First 2
These codes say to code first a condition named in the note, and Z09 is one of the conditions named.
Code Also 1
These codes say Z09 may also be needed to fully describe the condition. The note gives no sequencing direction.
- Block Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Admission (for) See Also: Encounter (for);
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert Z09 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z09Overview
Is Z09 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Z09 group to?
On inpatient claims, encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm 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 Z09 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z09 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 follow-up examination after completed treatment for conditions other than malignant neoplasm on inpatient claims. The code appears in the Persons encountering health services for examinations (Z00-Z13) range of the CMS exempt list.
Can Z09 be reported with Z51?
Not as a rule. The Excludes1 note on Z09 lists "aftercare following medical care (Z43-Z49, Z51)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
