W59.11XD — Bitten by nonvenomous snake, subsequent encounter
W59.11XD is a billable, specific ICD-10-CM code for bitten by nonvenomous snake, subsequent encounter. It is valid for submission on a claim.
7th character "D" — subsequent encounter
The appropriate 7th character is to be added to each code from category W59
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 inherited from the categories above W59.11XD
These are not written on W59.11XD, but they bind it: a note on a category applies to every code beneath it. Billing W59.11XD with anything listed here is a denial.
Risk adjustment
W59.11XD does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
W59.11XD is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A58872Billing and Coding: Tetanus Immunization
- A58873Billing and Coding: Tetanus Immunization
Code history
W59.11XD has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share W59.11. If W59.11XD is not quite right, the correct code is usually one of these.
Questions about W59.11XD
- Is W59.11XD a billable ICD-10-CM code?
- Yes. W59.11XD is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does W59.11XD sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Exposure to animate mechanical forces (W50-W64).
- What cannot be coded together with W59.11XD?
- W59.11XD carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above W59.11XD (W59) and apply to it just the same.