S90.42 ICD 10 Code is a non-billable and non-specific code and should not be used to indicate a diagnosis for reimbursement purposes. There are other codes below it with greater level of diagnosis detail. The 2023 edition of the American ICD-10-CM code became effective on October 1, 2022.
Codes
- S90.421 Blister (nonthermal), right great toe
- S90.421A Blister (nonthermal), right great toe, initial encounter
- S90.421D Blister (nonthermal), right great toe, subsequent encounter
- S90.421S Blister (nonthermal), right great toe, sequela
- S90.422 Blister (nonthermal), left great toe
- S90.422A Blister (nonthermal), left great toe, initial encounter
- S90.422D Blister (nonthermal), left great toe, subsequent encounter
- S90.422S Blister (nonthermal), left great toe, sequela
- S90.423 Blister (nonthermal), unspecified great toe
- S90.423A Blister (nonthermal), unspecified great toe, initial encounter
- S90.423D Blister (nonthermal), unspecified great toe, subsequent encounter
- S90.423S Blister (nonthermal), unspecified great toe, sequela
- S90.424 Blister (nonthermal), right lesser toe(s)
- S90.424A Blister (nonthermal), right lesser toe(s), initial encounter
- S90.424D Blister (nonthermal), right lesser toe(s), subsequent encounter
- S90.424S Blister (nonthermal), right lesser toe(s), sequela
- S90.425 Blister (nonthermal), left lesser toe(s)
- S90.425A Blister (nonthermal), left lesser toe(s), initial encounter
- S90.425D Blister (nonthermal), left lesser toe(s), subsequent encounter
- S90.425S Blister (nonthermal), left lesser toe(s), sequela
- S90.426 Blister (nonthermal), unspecified lesser toe(s)
- S90.426A Blister (nonthermal), unspecified lesser toe(s), initial encounter
- S90.426D Blister (nonthermal), unspecified lesser toe(s), subsequent encounter
- S90.426S Blister (nonthermal), unspecified lesser toe(s), sequela
Possible back-references that may be applicable or related to S90.42 ICD10 Code:
- S00-T88 Injury, poisoning and certain other consequences of external causes
- S90-S99 Injuries to the ankle and foot
- S90 Superficial injury of ankle, foot and toes
- S90.0 Contusion of ankle
- S90.1 Contusion of toe without damage to nail
- S90.2 Contusion of toe with damage to nail
- S90.3 Contusion of foot
- S90.4 Other superficial injuries of toe
- S90.5 Other superficial injuries of ankle
- S90.8 Other superficial injuries of foot
- S90.9 Unspecified superficial injury of ankle, foot and toe
Present On Admission (POA Exempt)
S90.42 ICD 10 code is considered exempt from POA reporting
Clinical information about S90.42 ICD 10 code
What are blisters?
Blisters are fluid-filled sacs on the outer layer of your skin. They form because of rubbing, heat, or diseases of the skin. They are most common on your hands and feet.
Other names for blisters are vesicles (usually for smaller blisters) and bulla (for larger blisters).
What causes blisters?
Blisters often happen when there is friction - rubbing or pressure - on one spot. For example, if your shoes don't fit quite right and they keep rubbing part of your foot. Or if you don't wear gloves when you rake leaves and the handle keeps rubbing against your hand. Other causes of blisters include:
- Burns
- Sunburn
- Frostbite
- Eczema
- Allergic reactions
- Poison ivy, oak, and sumac
- Autoimmune diseases such as pemphigus
- Epidermolysis bullosa, an illness that causes the skin to be fragile
- Viral infections such as varicella zoster (which causes chickenpox and shingles) and herpes simplex (which causes cold sores)
- Skin infections including impetigo
What are the treatments for blisters?
Blisters will usually heal on their own. The skin over the blister helps keep out infections. You can put a bandage on the blister to keep it clean. Make sure that there is no more rubbing or friction on the blister.
You should contact your health care provider if:
- The blister looks infected - if it is draining pus, or the area around the blister is red, swollen, warm, or very painful
- You have a fever
- You have several blisters, especially if you cannot figure out what is causing them
- You have health problems such as circulation problems or diabetes
Normally you don't want to drain a blister, because of the risk of infection. But if a blister is large, painful, or looks like it will pop on its own, you can drain the fluid.
Can blisters be prevented?
There are some things you can do to prevent friction blisters:
- Make sure that your shoes fit properly
- Always wear socks with your shoes, and make sure that the socks fit well. You may want to wear socks that are acrylic or nylon, so they keep moisture away from your feet.
- Wear gloves or protective gear on your hands when you use any tools or sports equipment that cause friction.