W55.49XA (Other contact with pig, initial encounter) compared with W56 (Contact with nonvenomous marine animal), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Not coded here — these two are mutually exclusive.
“contact with marine mammals (W56.-)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
No — do not report together. W55.49XA carries an Excludes1 note covering W56: “contact with marine mammals (W56.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
| W55.49XAOther contact with pig, initial encounter | W56Contact with nonvenomous marine animal | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: W56.01XA, W56.01XD, W56.01XS, W56.02XA, W56.02XD |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Other contact with pig, initial encounter is a billable ICD-10-CM diagnosis code (W55.49A). | Contact with nonvenomous marine animal is a non-billable ICD-10-CM category code (W56). |
| 7th character | The appropriate 7th character is to be added to each code from category W55 | The appropriate 7th character is to be added to each code from category W56 |
| Includes | contact with saliva, feces or urine of mammal | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources