2026 ICD-10-CM Diagnosis Code L50.6Contact urticaria

AHRQ’s CCSR groups this code into broader clinical categories.

• Angioedema

  swelling involving the deep dermis, subcutaneous, or submucosal tissues, representing localized edema. angioedema often occurs in the face, lips, tongue, and larynx.

• Chronic Inducible Urticaria

  chronic urticaria with identified triggering factor which is either physical, e.g., vibratory urticaria, or non-physical, e.g., aquagenic urticaria.

• Chronic Urticaria

  wheals (urticaria) and/or angioedema presented with daily symptoms lasting for more than 6 weeks. it may be classified into chronic spontaneous and chronic inducible urticaria depending on whether a specific trigger can be linked to the development of vascular reaction.

• Cold Urticaria

  various skin flares developing after exposure to cold temperature. while most are characterized by a limited episodic cutaneous condition characterized by urticarial wheals, such as in allergic urticaria, other types are more severe and generalized and rarely familial, e.g., cryopyrin-associated periodic syndromes.

• Cryopyrin-Associated Periodic Syndromes

  a group of rare autosomal dominant diseases, commonly characterized by atypical urticaria (hives) with systemic symptoms that develop into end-organ damage. the atypical hives do not involve t-cell or autoantibody. cryopyrin-associated periodic syndrome includes three previously distinct disorders: familial cold autoinflammatory syndrome; muckle-wells syndrome; and cinca syndrome, that are now considered to represent a disease continuum, all caused by nlrp3 protein mutations.

• Exercise-Induced Allergies

  allergic reactions following a period of exercise. elevated serum histamine and tryptase levels and cutaneous mast cell degranulation are often associated with post-exertional allergic reactions which sometimes are triggered only in combination with prior consumption of a specific food such as wheat. allergic symptoms produced post-exercise range from skin eruption, asthma, bronchospasm, and anaphylaxis.

• Urticaria

  a vascular reaction of the skin characterized by erythema and wheal formation due to localized increase of vascular permeability. the causative mechanism may be allergy, infection, or stress.

• Urticaria Pigmentosa

  the most common form of cutaneous mastocytosis (mastocytosis, cutaneous) that occurs primarily in children. it is characterized by the multiple small reddish-brown pigmented pruritic macules and papules.

• Urticaria, Solar

  chromophore-dependent photodermatosis triggered by uv and visible light.

Hives

Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than other people. Other causes include infections and stress.

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