ICD-10-CM 2027
ICD-10 code for urticaria
From the official ICD-10-CM alphabetic index entry “Urticaria”. Page updated September 29, 2026.
About coding urticaria
The ICD-10-CM code for urticaria is L50.9 (Urticaria, unspecified). The official index lists 35 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L50.9.
Within L50, choose L50.9 (unspecified) only when documentation doesn't support a more specific option: allergic urticaria (L50.0), idiopathic urticaria (L50.1), due to cold and heat (L50.2), Dermatographic urticaria (L50.3), Vibratory urticaria (L50.4), Cholinergic urticaria (L50.5), contact urticaria (L50.6) and other urticaria (L50.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific urticaria codes (official index)
- with angioneurotic edema T78.3 — Angioneurotic edema
- hereditary D84.1 — Defects in the complement system
- allergic L50.0 — Allergic urticaria
- cholinergic L50.5 — Cholinergic urticaria
- chronic L50.8 — Other urticaria
- cold, familial L50.2 — Urticaria due to cold and heat
- contact L50.6 — Contact urticaria
- dermatographic L50.3 — Dermatographic urticaria
- due to
- cold or heat L50.2 — Urticaria due to cold and heat
- drugs L50.0 — Allergic urticaria
- food L50.0 — Allergic urticaria
- inhalants L50.0 — Allergic urticaria
- plants L50.6 — Contact urticaria
- serum T80.69 — Other serum reaction due to other serum
- factitial L50.3 — Dermatographic urticaria
- familial cold M04.2 — Cryopyrin-associated periodic syndromes
- giant T78.3 — Angioneurotic edema
- hereditary D84.1 — Defects in the complement system
- gigantea T78.3 — Angioneurotic edema
- idiopathic L50.1 — Idiopathic urticaria
- larynx T78.3 — Angioneurotic edema
- hereditary D84.1 — Defects in the complement system
- neonatorum P83.88 — Other specified conditions of integument specific to newborn
- nonallergic L50.1 — Idiopathic urticaria
- papulosa (Hebra) L28.2 — Other prurigo
- pigmentosa D47.01 — Cutaneous mastocytosis
- congenital Q82.2 — Congenital cutaneous mastocytosis
- of neonatal onset Q82.2 — Congenital cutaneous mastocytosis
- of newborn onset Q82.2 — Congenital cutaneous mastocytosis
- recurrent periodic L50.8 — Other urticaria
- serum T80.69 — Other serum reaction due to other serum
- solar L56.3 — Solar urticaria
- specified type NEC L50.8 — Other urticaria
- thermal (cold) (heat) L50.2 — Urticaria due to cold and heat
- vibratory L50.4 — Vibratory urticaria
- xanthelasmoidea
Common questions about urticaria ICD-10 codes
What is the ICD-10 code for urticaria?
- L50.9 — Urticaria, unspecified. More specific codes apply when the documentation supports them: T78.3, D84.1, L50.0, L50.5 and others below.
What is the ICD-10 code for allergic urticaria?
- L50.0 — Allergic urticaria.
What is the ICD-10 code for cholinergic urticaria?
- L50.5 — Cholinergic urticaria.
What is the ICD-10 code for chronic urticaria?
- L50.8 — Other urticaria.
What is the ICD-10 code for contact urticaria?
- L50.6 — Contact urticaria.
What is the ICD-10 code for dermatographic urticaria?
- L50.3 — Dermatographic urticaria.
What is the ICD-10 code for factitial urticaria?
- L50.3 — Dermatographic urticaria.
Is L50.9 billable?
- Yes. L50.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L50.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L50.9 as a principal diagnosis.
Is L50.9 a CC or MCC?
- No. L50.9 is neither a CC nor an MCC under MS-DRG v44.0.