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Z43.5 ICD-10-CM Code: Encounter for attention to cystostomy

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

Coding at a Glance

Tabular directives
5 inclusion terms · 1 Excludes1 · 2 Excludes2
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 188

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 698 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC (MDC 11)
  • MS-DRG 699 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH CC (MDC 11)
  • MS-DRG 700 — OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITHOUT CC/MCC (MDC 11)

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.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 463 — Artificial Openings for Feeding or Elimination

Other models: CMS-HCC V22 HCC 188

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for Z43.5 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on Z43.5 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • closure of artificial openings
  • passage of sounds or bougies through artificial openings
  • reforming artificial openings
  • removal of catheter from artificial openings
  • toilet or cleansing of artificial openings

Source: inherited from Z43

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).

Source: inherited from Z43

Excludes2 — Not Included Here

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

Coder workflow for Z43.5

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

Before you code Z43.5

  1. Confirm the reason for the encounter this Z code records: aftercare or a therapy encounter after the initial treatment of a disease or injury. 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.7, I.C.21.c.15).

    Guide: Aftercare vs follow-up →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with Z43.5. 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 Z43.5’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.

    ReviewJ95.0, K94, N99.5

Consider Z43.5. Then 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 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 Z43.5(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with Z43.5: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareJ95.0, K94, N99.5

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

  • Excludes2 — not part of Z43.5(2 notes)

    Coding workflow: The conditions named in this note are not included in Z43.5. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

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

Coding decision scenarios

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

Documentation: Both the condition Z43.5 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).

ReviewJ95.0, K94, N99.5

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 attention to cystostomy is a billable ICD-10-CM diagnosis code (Z43.5).

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 (5)

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

The aftercare codes are generally found in the following categories: 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

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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 Z43.5 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 3 Excludes1 notes: Z08 — Encounter for follow-up examination after completed treatment for malignant neoplasm (via Z43.-), Z09 — Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm (via Z43.-), Z93 — Artificial opening status (via Z43.-).

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

Referenced by 13 Excludes2 notes across 2 chapters: T80 — Complications following infusion, transfusion and therapeutic injection (via Z43.-), T80-T88 — Complications of surgical and medical care, not elsewhere classified (T80-T88) (via Z43.-), T81 — Complications of procedures, not elsewhere classified (via Z43.-), T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts (via Z43.-), T83 — Complications of genitourinary prosthetic devices, implants and grafts (via Z43.-), T84 — Complications of internal orthopedic prosthetic devices, implants and grafts (via Z43.-), T85 — Complications of other internal prosthetic devices, implants and grafts (via Z43.-), T86 — Complications of transplanted organs and tissue (via Z43.-), T87 — Complications peculiar to reattachment and amputation (via Z43.-), T88 — Other complications of surgical and medical care, not elsewhere classified (via Z43.-), Z46.6 — Encounter for fitting and adjustment of urinary device, Z48 — Encounter for other postprocedural aftercare (via Z43.-), Z98 — Other postprocedural states (via Z43.-).

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

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 698 (MDC 11), DRG 699 (MDC 11), DRG 700 (MDC 11).

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

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Artificial Openings for Feeding or Elimination) for risk-adjusted payment.

K94.29 — Other complications of gastrostomy, K94.30 — Esophagostomy complications, unspecified, K94.31 — Esophagostomy hemorrhage, K94.32 — Esophagostomy infection, K94.33 — Esophagostomy malfunction, K94.39 — Other complications of esophagostomy, 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, Z43.6 — Encounter for attention to other artificial openings of urinary tract, Z43.8 — Encounter for attention to other artificial openings, Z43.9 — Encounter for attention to unspecified artificial opening, Z93.1 — Gastrostomy status, Z93.2 — Ileostomy status, Z93.3 — Colostomy status, Z93.4 — Other artificial openings of gastrointestinal tract status, Z93.50 — Unspecified cystostomy status, Z93.51 — Cutaneous-vesicostomy status, Z93.52 — Appendico-vesicostomy status, +20 more

Same clinical category (CCSR)

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

Z09 — Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm, 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, Z43.6 — 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 term “Admission”; these codes share that main term but sit in a different category of the Tabular List.

Z40.02 — Encounter for prophylactic removal of ovary(s) (prophylactic, organ removal, ovary), Z40.03 — Encounter for prophylactic removal of fallopian tube(s) (prophylactic, organ removal, fallopian tube), Z40.09 — Encounter for prophylactic removal of other organ (prophylactic, organ removal, testes), Z40.81 — Encounter for prophylactic surgery for removal of ovary(s) for persons without known genetic/familial risk factors (prophylactic, oophorectomy for persons without known genetic/ familial risk factors), Z40.82 — Encounter for prophylactic surgery for removal of fallopian tube(s) for persons without known genetic/familial risk factors (prophylactic, salpingectomy for persons without known genetic/ familial risk factors), Z41.1 — Encounter for cosmetic surgery (cosmetic surgery NEC), Z41.2 — Encounter for routine and ritual male circumcision (circumcision, ritual or routine), Z41.3 — Encounter for ear piercing (ear piercing), Z42.1 — Encounter for breast reconstruction following mastectomy (breast reconstruction following mastectomy), Z42.8 — Encounter for other plastic and reconstructive surgery following medical procedure or healed injury (reconstructive surgery following medical procedure or healed injury NEC), Z44.00 — Encounter for fitting and adjustment of unspecified artificial arm (adjustment, artificial, arm), Z44.01 — Encounter for fitting and adjustment of complete artificial arm (adjustment, artificial, arm, complete), Z44.02 — Encounter for fitting and adjustment of partial artificial arm (adjustment, artificial, arm, partial), Z44.10 — Encounter for fitting and adjustment of unspecified artificial leg (adjustment, artificial, leg), Z44.11 — Encounter for fitting and adjustment of complete artificial leg (adjustment, artificial, leg, complete), Z44.12 — Encounter for fitting and adjustment of partial artificial leg (adjustment, artificial, leg, partial), Z44.2 — Encounter for fitting and adjustment of artificial eye (fitting, artificial, eye), Z44.3 — Encounter for fitting and adjustment of external breast prosthesis (fitting, breast prosthesis), Z44.8 — Encounter for fitting and adjustment of other external prosthetic devices (adjustment, prosthesis, specified NEC), Z44.9 — Encounter for fitting and adjustment of unspecified external prosthetic device (fitting, prosthesis), +77 more

Contextual Map

Every relationship of Z43.5 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 Z43.5 with these 11 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes (13)

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 463 — Artificial Openings for Feeding or Elimination [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper

MDC crossing

  • MDC 11 — Diseases and Disorders of the Kidney and Urinary Tract[MDC crossing]: “Diseases and Disorders of the Kidney and Urinary Tract — 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. 3,574 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Admission (for), attention to artificial opening (of), cystostomy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Admission (for), removal of, cystostomy catheter[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Attention (to), artificial, opening (of), urinary tract NEC, cystostomy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Attention (to), cystostomy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Cystostomy, attention to[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (10)

Change history

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

Common coding questions

Is Z43.5 an acceptable principal diagnosis?

Yes. Z43.5 is absent from the MCE unacceptable-principal list and, as aftercare, “generally first listed” — a routine cystostomy catheter change leads with it. The status side (Z93.50–Z93.59) is what the MCE rejects as principal; see When can a Z code be the primary diagnosis?.

Z43.5 covers which cystostomy types?

All of them — unlike the status family, which splits into Z93.50, Z93.51, Z93.52, and Z93.59, the attention side has the single code Z43.5 for any cystostomy encounter. A complication of the cystostomy goes to N99.51- instead, per the Excludes1.

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
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release 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

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "Z43.5 — Encounter for attention to cystostomy." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/z43.5-encounter-for-attention-to-cystostomy

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Encounter for attention to cystostomy

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.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to Z43.5 in its code family, with their registry titles.

View all codes in the Z43 family