S58.912A — Complete traumatic amputation of left forearm, level unspecified, initial encounter
S58.912A is a billable, specific ICD-10-CM code for complete traumatic amputation of left forearm, level unspecified, initial encounter. It is valid for submission on a claim.
7th character "A" — initial encounter
The appropriate 7th character is to be added to each code from category S58
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 inherited from the categories above S58.912A
These are not written on S58.912A, but they bind it: a note on a category applies to every code beneath it. Billing S58.912A with anything listed here is a denial.
Other codes that can never be billed with S58.912A
These codes carry an Excludes1 note pointing at S58.912A. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S58.912A alone.
Risk adjustment
S58.912A risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 405 Traumatic Amputations and Complications0.598 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
S58.912A is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52438Billing and Coding: Tetanus Immunization
- A54767Billing and Coding: Medicare Preventive Coverage for Certain Vaccines
- A57056Billing and Coding: Aortography and Peripheral Angiography
- A57554Billing and Coding: Immune Globulins
Code history
S58.912A 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 S58.912. If S58.912A is not quite right, the correct code is usually one of these.
Questions about S58.912A
- Is S58.912A a billable ICD-10-CM code?
- Yes. S58.912A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S58.912A sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the elbow and forearm (S50-S59).
- What cannot be coded together with S58.912A?
- S58.912A 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 S58.912A (S58.9, S58) and apply to it just the same.