Skip to main content
Call AIBook a demo

ICD-10-CM Z09: Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm

Z09 is the billable ICD-10-CM code for encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm, in category Z09 (Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm) of the Persons encountering health services for examinations section. As a principal diagnosis it groups to MS-DRG 951 Other Factors Influencing Health Status (MDC 23 MDC 23: Factors Influencing Health Status and Other Contacts with Health Services). 45 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
Z09
billable FY2027 ICD-10-CM code
Category
Z09 Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm
Chapter
21: Factors influencing health status and contact with health services (Z00-Z99)
CC/MCC (MS-DRG v44)
Neither
CMS-HCC V28
Not mapped
POA reporting
Exempt

Tabular list notes for Z09

Inclusion terms
  • Medical surveillance following completed treatment
Excludes1 (never coded together)
  • aftercare following medical care (Z43-Z49, Z51)
  • surveillance of contraception (Z30.4-)
  • surveillance of prosthetic and other medical devices (Z44-Z46)
Use additional code
  • code to identify any applicable history of disease code (Z86.-, Z87.-)

MS-DRG grouping when Z09 is the principal diagnosis

MS-DRG v44 groups for Z09 as principal diagnosis
MDCMS-DRGs
23 MDC 23: Factors Influencing Health Status and Other Contacts with Health Services951

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for Z09 shows the full grouping logic.

CC/MCC status and inpatient edits

Z09 is neither a CC nor an MCC under MS-DRG v44, so as a secondary diagnosis it does not raise the MS-DRG severity level. Check Z09 against a principal diagnosis.

  • Present on admission: exempt from POA indicator reporting (FY2027 exempt list).
  • Medicare Code Editor: unacceptable principal diagnosis.

CMS-HCC V28 risk adjustment

Z09 does not map to a payment HCC in the PY2027 CMS-HCC V28 model, so on its own it does not change a Medicare Advantage risk score.

LCD billing and coding articles that list Z09

45 current Medicare billing and coding articles list Z09 among the diagnoses that support medical necessity for the services they cover.

For teams evaluating QuickIntell software

Evaluate software for diagnosis coding review

If your team codes diagnoses at volume, review how QuickCode supports qualified coder review of documentation, specificity queries and the billing handoff. Confirm the code sets, settings and reviewer responsibilities during evaluation; a code reference is not a coding determination for a patient.

Evaluate QuickCode for diagnosis codingSee risk adjustment review
Book a software demoAsk about a software workflow

Optional software evaluation, not payer support or help with an individual claim. For coverage or payment decisions, use the official sources on this page. Do not include patient information in a demo booking or inquiry.

Frequently asked questions

What does ICD-10-CM Z09 mean?

Z09 means encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm. The tabular list also files these terms under it: Medical surveillance following completed treatment. It is one of 1 billable codes under Z09, encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm.

What can't be coded with Z09?

Excludes1 at Z09: aftercare following medical care (Z43-Z49, Z51); surveillance of contraception (Z30.4-); surveillance of prosthetic and other medical devices (Z44-Z46). These are never reported together with Z09.

What else is coded with Z09?

The tabular instructions at Z09: code to identify any applicable history of disease code (Z86.-, Z87.-).

Which MS-DRG does Z09 group to?

As the principal diagnosis, Z09 groups to MS-DRG 951 Other Factors Influencing Health Status (MDC 23 MDC 23: Factors Influencing Health Status and Other Contacts with Health Services) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.