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

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
1 inclusion term · 3 Excludes1 · 1 Excludes2 · 1 use-additional code

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 951 — OTHER FACTORS INFLUENCING HEALTH STATUS (MDC 23)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for Z09 in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on Z09 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Medical surveillance following completed treatment

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from Z00-Z13

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code to identify any applicable history of disease code (Z86.-, Z87.-)

Coder workflow for Z09

MedCoder structured workflow — derived from this code’s own official record

Before you code Z09

  1. Confirm the reason for the encounter this Z code records: an examination or encounter with no complaint or diagnosis. Check whether the code may be reported as first-listed or principal — some Z codes are limited to one position — and do not report a history or status code for a condition documented as current. Z code categories and their reporting positions (Guidelines I.C.21.c, I.C.21.c.15).

    Guide: Z codes as principal or first-listed diagnosis →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with Z09. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in Z09’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewZ51, Z30.4

Consider Z09. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.
The reason for the encounter
Whether the code records the encounter’s purpose, a status, or a history — and whether it may be first-listed (Guidelines I.C.21.c).

Official instructions as workflow

  • Excludes1 — check before selecting Z09(3 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with Z09: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareZ51, Z30.4

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of Z09(1 note)

    Coding workflow: The conditions named in this note are not included in Z09. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareZ39

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying Z09(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with Z09 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewZ86, Z87

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition Z09 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewZ51, Z30.4

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with Z09?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

ReviewZ86, Z87

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm is a billable ICD-10-CM diagnosis code (Z09).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (13)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9 a. Human Immunodeficiency Virus (HIV) Infections 1) Code only confirmed cases

(j) Follow-up visits after COVID-19 infection has resolved For individuals who previously had COVID-19, without residual symptom(s) or condition(s), and are being seen for follow-up evaluation, and COVID-19 test results are negative, assign codes Z09, Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm, and Z86.16, Personal history of COVID-19.

Chapter 21: Factors influencing health status and contact with health services (Z00-Z99)

The follow-up Z codes/categories: Z08 Encounter for follow- up examination after completed treatment for malignant neoplasm 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)

Codes Z08, Encounter for follow-up examination after completed treatment for malignant neoplasm, and Z09, Encounter for follow up examination after completed treatment for conditions other than malignant neoplasm, may be assigned following any type of completed treatment modality (including both medical and surgical treatments).

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 3 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 1 Excludes2 entry — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • Principal-diagnosis restriction. The Medicare Code Editor lists this code as unacceptable as a principal diagnosis: it describes a circumstance influencing health status rather than a current illness or injury being treated. It is valid as a secondary diagnosis.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name Z09 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes: Z48 — Encounter for other postprocedural aftercare, Z51 — Encounter for other aftercare and medical care.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 15 Excludes2 notes: Z40 — Encounter for prophylactic surgery, Z40-Z53 — Encounters for other specific health care (Z40-Z53), Z41 — Encounter for procedures for purposes other than remedying health state, Z42 — Encounter for plastic and reconstructive surgery following medical procedure or healed injury, Z43 — Encounter for attention to artificial openings, Z44 — Encounter for fitting and adjustment of external prosthetic device, Z45 — Encounter for adjustment and management of implanted device, Z46 — Encounter for fitting and adjustment of other devices, Z47 — Orthopedic aftercare, Z48 — Encounter for other postprocedural aftercare, Z49 — Encounter for care involving renal dialysis, Z51 — Encounter for other aftercare and medical care, Z52 — Donors of organs and tissues, Z53 — Persons encountering health services for specific procedures and treatment, not carried out, Z98 — Other postprocedural states.

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 2 Code First instructions: Z86 — Personal history of certain other diseases, Z87 — Personal history of other diseases and conditions.

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 24 Code Also instructions: Z77 — Other contact with and (suspected) exposures hazardous to health, Z77-Z99 — Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99), Z78 — Other specified health status, Z79 — Long term (current) drug therapy, Z80 — Family history of primary malignant neoplasm, Z81 — Family history of mental and behavioral disorders, Z82 — Family history of certain disabilities and chronic diseases (leading to disablement), Z83 — Family history of other specific disorders, Z84 — Family history of other conditions, Z85 — Personal history of malignant neoplasm, Z86 — Personal history of certain other diseases, Z87 — Personal history of other diseases and conditions, Z88 — Allergy status to drugs, medicaments and biological substances, Z89 — Acquired absence of limb, Z90 — Acquired absence of organs, not elsewhere classified, Z91 — Personal risk factors, not elsewhere classified, Z92 — Personal history of medical treatment, Z93 — Artificial opening status, Z94 — Transplanted organ and tissue status, Z95 — Presence of cardiac and vascular implants and grafts, +4 more.

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 1 MS-DRG: DRG 951 (MDC 23).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):FAC010 — Other aftercare encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Principal diagnosis restriction (Medicare Code Editor)

Not acceptable as a principal diagnosis on an inpatient claim.

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Other aftercare encounter).

Z43.0 — Encounter for attention to tracheostomy, Z43.1 — Encounter for attention to gastrostomy, Z43.2 — Encounter for attention to ileostomy, Z43.3 — Encounter for attention to colostomy, Z43.4 — Encounter for attention to other artificial openings of digestive tract, Z43.5 — Encounter for attention to cystostomy, Z43.6 — Encounter for attention to other artificial openings of urinary tract, Z43.7 — Encounter for attention to artificial vagina, Z43.8 — Encounter for attention to other artificial openings, Z43.9 — Encounter for attention to unspecified artificial opening, Z47.1 — Aftercare following joint replacement surgery, Z47.2 — Encounter for removal of internal fixation device, Z47.31 — Aftercare following explantation of shoulder joint prosthesis, Z47.32 — Aftercare following explantation of hip joint prosthesis, Z47.33 — Aftercare following explantation of knee joint prosthesis, Z47.81 — Encounter for orthopedic aftercare following surgical amputation, Z47.82 — Encounter for orthopedic aftercare following scoliosis surgery, Z47.89 — Encounter for other orthopedic aftercare, Z48.00 — Encounter for change or removal of nonsurgical wound dressing, Z48.01 — Encounter for change or removal of surgical wound dressing, +29 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Admission”, “Examination”; these codes share that main term but sit in a different category of the Tabular List.

Z04.3 — Encounter for examination and observation following other accident (following, accident NEC), Z04.41 — Encounter for examination and observation following alleged adult rape (alleged rape or sexual assault, ruled out, adult), Z04.42 — Encounter for examination and observation following alleged child rape (alleged rape or sexual assault, ruled out, child), Z04.6 — Encounter for general psychiatric examination, requested by authority (psychiatric NEC, requested by authority), Z04.71 — Encounter for examination and observation following alleged adult physical abuse (abuse, physical, ruled out, adult), Z04.72 — Encounter for examination and observation following alleged child physical abuse (abuse, physical, ruled out, child), Z04.81 — Encounter for examination and observation of victim following forced sexual exploitation (forced sexual exploitation), Z04.82 — Encounter for examination and observation of victim following forced labor exploitation (forced labor exploitation), Z04.89 — Encounter for examination and observation for other specified reasons (medicolegal reason NEC), Z08 — Encounter for follow-up examination after completed treatment for malignant neoplasm (follow-up, malignant neoplasm), Z11.1 — Encounter for screening for respiratory tuberculosis (sensitivity test, Mantoux), Z12.4 — Encounter for screening for malignant neoplasm of cervix (Papanicolaou smear, cervix), Z23 — Encounter for immunization (prophylactic, vaccination), Z30.014 — Encounter for initial prescription of intrauterine contraceptive device (intrauterine device management, initial prescription), Z30.431 — Encounter for routine checking of intrauterine contraceptive device (contraceptive, device), Z30.432 — Encounter for removal of intrauterine contraceptive device (removal of, intrauterine contraceptive device), Z30.46 — Encounter for surveillance of implantable subdermal contraceptive (removal of, implantable subdermal contraceptive), Z30.8 — Encounter for other contraceptive management (contraceptive), Z30.9 — Encounter for contraceptive management, unspecified (contraceptive management), Z31.0 — Encounter for reversal of previous sterilization (poststerilization), +121 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Blood Glucose Test, CEA Test, Fecal Occult Blood Test (FOBT), Gamma-glutamyl Transferase (GGT) Test, Thyroid Stimulating Hormone (TSH)

Contextual Map

Every relationship of Z09 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run Z09 with these 24 related codes in Claim Check

Hierarchy

Excludes1 (9)

Excludes2

Use Additional Code

Referenced by Excludes1 notes

Referenced by Excludes2 notes (15)

Referenced by Code First instructions

Referenced by Code Also instructions (24)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (13)

  • Admission (for), follow-up examination[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following), chemotherapy NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following), fracture[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following), psychotherapy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following), radiotherapy NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), follow-up (routine) (following), surgery NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Examination (for) (following) (general) (of) (routine), following, treatment (for)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • and 5 more

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Real-World Coding Questions

Questions working coders have asked about this code, answered from official sources and reviewed by an editor.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2026), quoted by section Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.