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W55.82XD ICD-10-CM Code: Struck by other mammals, subsequent encounter

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

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
1 inclusion term · 5 Excludes1

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for W55.82XD in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on W55.82XD 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.

  • contact with saliva, feces or urine of mammal

Source: inherited from W55

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).

7th Character Guide

"The appropriate 7th character is to be added to each code from category W55"

  • A — initial encounter
  • D — subsequent encounter (this page’s code)
  • 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

W55.82XA, W55.82XD, W55.82XS

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.

Code Overview

Struck by other mammals, subsequent encounter is a billable ICD-10-CM diagnosis code (W55.82XD).

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

Verify Before Coding

  • Principal-diagnosis restriction. External cause of morbidity codes (V, W, X and Y) describe the circumstance that caused an injury, not the condition treated. The Medicare Code Editor rejects them as a principal diagnosis; sequence the injury or condition first and report this code as secondary.

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

Other codes that name W55.82XD 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 27 Excludes1 notes: W20 — Struck by thrown, projected or falling object (via W55.-), W20-W49 — Exposure to inanimate mechanical forces (W20-W49) (via W55.-), W21 — Striking against or struck by sports equipment (via W55.-), W22 — Striking against or struck by other objects (via W55.-), W23 — Caught, crushed, jammed or pinched in or between objects (via W55.-), W24 — Contact with lifting and transmission devices, not elsewhere classified (via W55.-), W25 — Contact with sharp glass (via W55.-), W26 — Contact with other sharp objects (via W55.-), W27 — Contact with nonpowered hand tool (via W55.-), W28 — Contact with powered lawn mower (via W55.-), W29 — Contact with other powered hand tools and household machinery (via W55.-), W30 — Contact with agricultural machinery (via W55.-), W31 — Contact with other and unspecified machinery (via W55.-), W32 — Accidental handgun discharge and malfunction (via W55.-), W33 — Accidental rifle, shotgun and larger firearm discharge and malfunction (via W55.-), W34 — Accidental discharge and malfunction from other and unspecified firearms and guns (via W55.-), W35 — Explosion and rupture of boiler (via W55.-), W36 — Explosion and rupture of gas cylinder (via W55.-), W37 — Explosion and rupture of pressurized tire, pipe or hose (via W55.-), W38 — Explosion and rupture of other specified pressurized devices (via W55.-), +7 more.

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

Clinical classification (AHRQ CCSR):EXT029 — External cause codes: subsequent encounter.

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 clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (External cause codes: subsequent encounter).

+2321 more

Contextual Map

Every relationship of W55.82XD 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.

Hierarchy

Referenced by Excludes1 notes (27)

Clinical classification (CCSR)

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]

Common coding questions

Does W55.82XD require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category W55.

Sources for this page

Every coding fact on this page is read from the datasets below. Nothing is AI-generated; MedCoder-derived relationships and editorial are labelled where they appear.

Code, title, tabular notes and index terms
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025
Claim edits
CMS Definitions of Medicare Code Edits — v43.1 (April 2026)
Change history and date-of-service validity
CMS ICD-10-CM release addenda, ingested release by release into the change ledger
Comparisons, relationships and the contextual map MedCoder-derived
Derived by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

All data sources and release dates

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Struck by other mammals, subsequent encounter

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 W55.82XD in its code family, with their registry titles.

View all codes in the W55 family