Urticaria, also known as hives, is a skin rash with red, raised, itchy bumps that is often triggered by allergic reactions, infections, stress, cold temperatures, vibration, or certain foods and medications. Erythema is redness of the skin or mucous membranes caused by increased blood flow in superficial capillaries, which can result from infections, skin injuries, inflammation, sunburn, medications, toxins, radiation exposure, or other causes. The document defines and provides examples of specific types of urticaria and erythema, as well as their ICD-10 codes for classification and coding guidelines specifying that the underlying condition should be coded first.

1. URTICARIA AND
ERYTHEMA

2. URTICARIA
• urticaria, is a kind of skin rash with red, raised, itchy
bumps.
• It is also known as hives

3. • Hives frequently occur following an infection or as a
result of an allergic reaction such as to
medication, insect bites, or food. Psychological stress,
cold temperature, or vibration may also be a trigger.

4. CAUSES
• Medications
• Food
• Infection or environmental agent
• Dermatographic urticaria
• Pressure or delayed pressure
• Cholinergic or stress
• Cold-induced
• Solar urticaria
• Water-induced
• Exercise

5. ERYTHEMA
• Erythema is redness of the skin or mucous
membranes, caused by hyperemia (increased blood
flow) in superficial capillaries. It occurs with any skin
injury, infection,or inflammation.

6. CAUSES
• infection
• massage
• electrical
• acne medication
• allergies
• exercise
• solar radiation (sunburn)
• cutaneous radiation syndrome
• mercury toxicity,
• blister agents
• niacin administration

7. TYPES
• Erythema ab igne
• Erythema chronicum migrans
• Erythema induratum
• Erythema infectiosum (or fifth disease)
• Erythema marginatum
• Erythema migrans
• Erythema multiforme(EM)
• Erythema nodosum
• Erythema toxicum
• Erythema gyratum repens
• Keratolytic winter erythema
• Palmar erythema

8. DEFINITIONS
• Erythema multiforme (EM) is a skin condition of unknown
cause; it is a type of erythema possibly mediated by
deposition of immune complexes (mostly IgM-bound
complexes) in the superficial microvasculature of the
skin and oral mucous membrane that usually follows an
infection or drug exposure.

9. • Erythema nod sum (EN), also known as Sub acute
Migratory Panniculitis of Vilanova and Piñol, is
an inflammatory condition characterised by inflammation
of the fat cells under the skin, resulting in tender red
nodules or lumps that are usually seen on both shins.

10. ICD-10-CM GUIDELINES
• Exfoliation due to erythematous conditions according to
extent of body surface involved-L49
• Code first erythematous condition causing exfoliation
• Urticaria-L50
• Erythema multiforme-L51

11. • Erythema nod sum-L52
• Other erthematous conditions-L53
• Erythema in diseases classified elsewhere-L54
• Code first underlying diseases
• https://www.medesunglobal.com

12. THANK
YOU