T59.894A — Toxic effect of other specified gases, fumes and vapors, undetermined, initial encounter
T59.894A is a billable, specific ICD-10-CM code for toxic effect of other specified gases, fumes and vapors, undetermined, 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 T59
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
T59.894A 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
T59.894A 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.
- A56612Billing and Coding: CT of the Head
- A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
- A57205Billing and Coding: Oximetry Services
- A57224Billing and Coding: Respiratory Care
Related codes at this level
Codes that share T59.894. If T59.894A is not quite right, the correct code is usually one of these.
Questions about T59.894A
- Is T59.894A a billable ICD-10-CM code?
- Yes. T59.894A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T59.894A sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).