W50.3XXA vs W50.3XXS
W50.3XXA (Accidental bite by another person, initial encounter) compared with W50.3XXS (Accidental bite by another person, sequela), from the official CMS tabular data.
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources
Summary
No tabular note links these codes. Both belong to category W50, and nothing in the tabular list prevents reporting each when it is documented.
Registry fact- What is different?
Title wording.The titles share “Accidental bite by another person”; W50.3XXA says “initial encounter” where W50.3XXS says “sequela”.
Registry fact
Nothing found in 7 other checks
- Can these codes be reported together?
No instruction prevents it.No note in either entry names the other. Both belong to category W50; each may be reported when its own documentation is present.
Registry fact
- Is there an Excludes1 relationship?
None.Neither entry carries an Excludes1 note that names the other code. W50.3XXA carries 3 Excludes1 notes and W50.3XXS carries 3 Excludes1 notes covering other codes; the side-by-side table quotes them.
Official rule
- Is there an Excludes2 relationship?
None.Neither entry carries an Excludes2 note that names the other code.
Official rule
- Is one more specific?
No.Neither is a subdivision of the other, and neither title is the unspecified form; they describe different conditions within category W50.
Registry fact
- Is one a parent or header code?
No.Both are billable codes, and neither contains the other.
Registry fact
- Are there sequencing instructions?
None.Neither entry carries a Code First or Use Additional Code note that names the other.
Official rule
- Are there other coding relationships?
None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.
MedCoder-derived
Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels
Can these codes be reported together?
Yes, when each is documented. W50.3XXA and W50.3XXS both belong to category W50.
No Excludes1/Excludes2 relationship exists between these codes in the official tabular list. The code titles state what each one covers, and the documentation decides which applies.
Side by side
Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.
Accidental bite by another person, initial encounter
Accidental bite by another person, sequela
- assault by bodily force (Y04)
- struck by objects (W20-W22)
- Toxic effect of contact with venomous animals and plants (T63.-)
W50 Accidental hit, strike, kick, twist, bite or scratch by another person
V00-Y99 — External Causes of Morbidity (V00-Y99)
- hit, strike, kick, twist, bite, or scratch by another person NOS
- Human bite
- Bite by another person NOS
- The appropriate 7th character is to be added to each code from category W50
No Excludes2, Code first, Use additional code and Code also note at either code.
Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, each code’s own notes are listed under it, and the notes every code shares are listed once beneath them.
Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources