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ICD-10-CM 2027 diagnosis code

S40.86Insect bite (nonvenomous) of upper arm

Not billable — use a more specific codeRequires 7th character

S40.86 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S40.86

S40.86 is the ICD-10-CM diagnosis code for insect bite (nonvenomous) of upper arm. It belongs to category S40 (superficial injury of shoulder and upper arm), block S40-S49 (injuries to the shoulder and upper arm) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within S40.8 (other superficial injuries of upper arm), S40.86 is specifically for insect bite (nonvenomous) of upper arm. Related codes cover abrasion of upper arm (S40.81), Blister (nonthermal) of upper arm (S40.82), external constriction of upper arm (S40.84), superficial foreign body of upper arm (S40.85) and other superficial bite of upper arm (S40.87).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category S40

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S40.86.

Broader instructions also apply from S40-S49 Injuries to the shoulder and upper arm and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to S40.86.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S40.86

Is S40.86 billable?

No. S40.86 is a header code. Report one of its more specific subcodes instead.