Version 2024

2024 ICD-10-CM Diagnosis Code S20.16

Insect bite (nonvenomous) of breast

ICD-10-CM Code:
S20.16
ICD-10 Code for:
Insect bite (nonvenomous) of breast
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Injuries to the thorax
      (S20-S29)
      • Superficial injury of thorax
        (S20)

S20.16 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of insect bite (nonvenomous) of breast. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Insect bite (nonvenomous) of breast

Non-specific codes like S20.16 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for insect bite (nonvenomous) of breast:

  • S20.161 for Insect bite (nonvenomous) of breast, right breast - NON-BILLABLE CODE

  • Use S20.161A for initial encounter - BILLABLE CODE

  • Use S20.161D for subsequent encounter - BILLABLE CODE

  • Use S20.161S for sequela - BILLABLE CODE

  • S20.162 for Insect bite (nonvenomous) of breast, left breast - NON-BILLABLE CODE

  • Use S20.162A for initial encounter - BILLABLE CODE

  • Use S20.162D for subsequent encounter - BILLABLE CODE

  • Use S20.162S for sequela - BILLABLE CODE

  • S20.169 for Insect bite (nonvenomous) of breast, unspecified breast - NON-BILLABLE CODE

  • Use S20.169A for initial encounter - BILLABLE CODE

  • Use S20.169D for subsequent encounter - BILLABLE CODE

  • Use S20.169S for sequela - BILLABLE CODE

Coding Guidelines

The appropriate 7th character is to be added to each code from block Superficial injury of thorax (S20). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Patient Education


Insect Bites and Stings

Most insect bites are harmless, though they sometimes cause discomfort. Bee, wasp, and hornet stings and fire ant bites usually hurt. Mosquito and flea bites usually itch. Insects can also spread diseases. In the United States, some mosquitoes spread West Nile virus. Travelers outside the United States may be at risk for malaria and other infections.

To prevent insect bites and their complications:

  • Don't bother insects
  • Use insect repellant
  • Wear protective clothing
  • Be careful when you eat outside because food attracts insects
  • If you know you have severe allergic reactions to insect bites and stings (such as anaphylaxis), carry an emergency epinephrine kit

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.