S31.805A — Open bite of unspecified buttock, initial encounter
S31.805A is a billable, specific ICD-10-CM code for open bite of unspecified buttock, 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 S31
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- superficial bite of buttock (S30.870)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Bite of buttock NOS
Risk adjustment
S31.805A 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
S31.805A is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57554Billing and Coding: Immune Globulins
Related codes at this level
Codes that share S31.805. If S31.805A is not quite right, the correct code is usually one of these.
Questions about S31.805A
- Is S31.805A a billable ICD-10-CM code?
- Yes. S31.805A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S31.805A sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).
- What cannot be coded together with S31.805A?
- S31.805A carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.