T79.5 ICD-10-CM Code: Traumatic anuria

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for T79.5 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 T79.5 itself; “inherited from” names the category or block whose note applies here.

7th Character Guide

"The appropriate 7th character is to be added to each code from category T79"

• A — initial encounter
• D — subsequent encounter
• S — sequela

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

T79.5XXA, T79.5XXD, T79.5XXS

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Coder workflow for T79.5

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

Before you code T79.5

1. T79.5 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

   ReviewT79.5XXA, T79.5XXD, T79.5XXS

   See the relationships section · Guide: How to choose an ICD-10-CM code →

2. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. T79.5 is not valid without one. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

   See the 7th Character Guide · Guide: 7th characters: initial, subsequent, sequela →

Choose the right path

1. Does the documentation support one of the more specific codes beneath T79.5?
   Yes → Select that code and continue the checks below on its own page.
   No → T79.5 cannot be reported as written; query for the specificity its subcategory needs.

   ReviewT79.5XXA, T79.5XXD, T79.5XXS

2. Is the encounter phase documented — active treatment, healing or recovery, or a sequela?
   Yes → Assign the matching 7th character; the variant codes are in the 7th Character Guide.
   No → The code is invalid without its 7th character — query for the missing element.

Consider T79.5. 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).

Encounter type

Active treatment, healing or recovery phase, or sequela — the basis of the 7th character (Guidelines I.C.19.a).

Official instructions as workflow

• Excludes2 — not part of T79.5(4 notes)

  Coding workflow: The conditions named in this note are not included in T79.5. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareJ80, P22.0

  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

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.

Indexed Clinical Terms (11)

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.

• Anuria, traumatic (following crushing)
• Bywaters' syndrome
• Compression, syndrome
• Crush, crushed, crushing, syndrome (complication of trauma)
• Failure, failed, renal, following, crushing
• Necrosis, necrotic (ischemic), kidney (bilateral), tubular, traumatic
• Shock, kidney, traumatic (following crushing)
• Syndrome, Bywaters'
• Syndrome, compression
• Syndrome, crush
• Syndrome, shock (traumatic), kidney, following crush injury

Don’t confuse T79.5 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of T79.5 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• T79.9— Specificity relationship (Review)

  Overlapping diagnoses in the same category.

  Overlapping codes in the same category — the documentation decides which is the more specific fit.

  What moves you there: A record that documents no more than “Unspecified early complication of trauma” takes T79.9; specificity in the record moves it back here.

  Full comparison: T79.5 vs T79.9 →

• T79.5XXA— Encounter relationship (Review)

  Same underlying diagnosis, different encounter phase.

  The same diagnosis at a different phase of care; one encounter takes one 7th character.

  What moves you there: Documentation of a initial encounter moves the case to T79.5XXA.

  Full comparison: T79.5 vs T79.5XXA →

• T79.5XXD— Encounter relationship (Review)

  Same underlying diagnosis, different encounter phase.

  The same diagnosis at a different phase of care; one encounter takes one 7th character.

  What moves you there: Documentation of a subsequent encounter moves the case to T79.5XXD.

  Full comparison: T79.5 vs T79.5XXD →

• J80— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of acute respiratory distress syndrome adds J80; it is not part of this code and both may be reported when both are documented.

  Full comparison: T79.5 vs J80 →

• T80— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of complications occurring during or following medical procedures adds T80; it is not part of this code and both may be reported when both are documented.

  Full comparison: T79.5 vs T80 →

• T88— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of complications occurring during or following medical procedures adds T88; it is not part of this code and both may be reported when both are documented.

  Full comparison: T79.5 vs T88 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• Not billable as written — a more specific code is required: T79.5XXA, T79.5XXD, T79.5XXS.
• Requires a 7th character. "The appropriate 7th character is to be added to each code from category T79" Options: T79.5XXA, T79.5XXD, T79.5XXS

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 T79.5 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 1 Excludes1 note: N17 — Acute kidney failure.

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

Referenced by 3 Excludes2 notes: N17-N19 — Acute kidney failure and chronic kidney disease (N17-N19), N18 — Chronic kidney disease (CKD), N19 — Unspecified kidney failure.

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

Related Codes

Same Index main term, other category

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

T78.05 — Anaphylactic reaction due to tree nuts and seeds (anaphylactic, due to food, nuts), T78.06 — Anaphylactic reaction due to food additives (anaphylactic, due to food, additives), T78.070 — Anaphylactic reaction due to milk and dairy products with tolerance to baked milk (anaphylactic, due to food, milk, with, tolerance to baked milk), T78.071 — Anaphylactic reaction due to milk and dairy products with reactivity to baked milk (anaphylactic, due to food, milk, with, reactivity to baked milk), T78.079 — Anaphylactic reaction due to milk and dairy products, unspecified (anaphylactic, due to food, milk), T78.080 — Anaphylactic reaction due to egg with tolerance to baked egg (anaphylactic, due to food, eggs, with, tolerance to baked egg), T78.081 — Anaphylactic reaction due to egg with reactivity to baked egg (anaphylactic, due to food, eggs, with, reactivity to baked egg), T78.089 — Anaphylactic reaction due to eggs, unspecified (anaphylactic, due to food, eggs), T78.09 — Anaphylactic reaction due to other food products (anaphylactic, due to food, specified type NEC), T78.2 — Anaphylactic shock, unspecified (anaphylactic), T80.51 — Anaphylactic reaction due to administration of blood and blood products (anaphylactic, serum, blood and blood products), T80.52 — Anaphylactic reaction due to vaccination (anaphylactic, immunization), T80.59 — Anaphylactic reaction due to other serum (anaphylactic, serum), T81.10 — Postprocedural shock unspecified (surgical), T81.11 — Postprocedural cardiogenic shock (postprocedural, cardiogenic), T81.12 — Postprocedural septic shock (postprocedural, septic), T81.19 — Other postprocedural shock (pleural), T86.02 — Bone marrow transplant failure (transplant, bone, marrow), T86.12 — Kidney transplant failure (transplant, kidney), T86.22 — Heart transplant failure (transplant, heart), +290 more

Contextual Map

Every relationship of T79.5 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 T79.5 with these 4 related codes in Claim Check

Hierarchy

• S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79-T79 — Certain early complications of trauma[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• N17 — Acute kidney failure[Excludes1]: “posttraumatic renal failure (T79.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• N17-N19 — Acute kidney failure and chronic kidney disease (N17-N19)[Excludes2]: “posttraumatic renal failure (T79.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• N18 — Chronic kidney disease (CKD)[Excludes2]: “posttraumatic renal failure (T79.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• N19 — Unspecified kidney failure[Excludes2]: “posttraumatic renal failure (T79.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Index entries (11)

• Anuria, traumatic (following crushing)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Bywaters' syndrome[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Compression, syndrome[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Crush, crushed, crushing, syndrome (complication of trauma)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Failure, failed, renal, following, crushing[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Necrosis, necrotic (ischemic), kidney (bilateral), tubular, traumatic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Shock, kidney, traumatic (following crushing)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Syndrome, Bywaters'[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• and 3 more

Nearest codes (40)

• T79 — Certain early complications of trauma, not elsewhere classified[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.0 — Air embolism (traumatic)[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.0XXA — Air embolism (traumatic), initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.0XXD — Air embolism (traumatic), subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.0XXS — Air embolism (traumatic), sequela[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.1 — Fat embolism (traumatic)[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.1XXA — Fat embolism (traumatic), initial encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• T79.1XXD — Fat embolism (traumatic), subsequent encounter[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

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

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

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) 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

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T79.5 in its code family, with their registry titles.

• T79.2XXS — Traumatic secondary and recurrent hemorrhage and seroma, sequela
• T79.4 — Traumatic shock
• T79.4XXA — Traumatic shock, initial encounter
• T79.4XXD — Traumatic shock, subsequent encounter
• T79.4XXS — Traumatic shock, sequela
• T79.5XXA — Traumatic anuria, initial encounter
• T79.5XXD — Traumatic anuria, subsequent encounter
• T79.5XXS — Traumatic anuria, sequela
• T79.6 — Traumatic ischemia of muscle
• T79.6XXA — Traumatic ischemia of muscle, initial encounter

View all codes in the T79 family