2027 ICD-10-CM Diagnosis Code L50.0Allergic urticaria
ICD-10-CM Codes›L00–L99›L49-L54›L50
- Billable — Valid for Submission
- Not Chronic
L50.0 is a billable ICD-10-CM diagnosis code for allergic urticaria. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607, 791, 793. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified inflammatory condition of skin.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Allergic contact urticaria
- Allergic urticaria
- Allergic urticaria and/or angioedema
- Allergic urticaria caused by ingested food
- Allergic urticaria due to bite and/or sting
- Allergic urticaria due to inhaled allergen
- Anaphylactic urticaria
- Contact urticaria
- Contact urticaria caused by food
- Harara
- Immunologic urticaria
- Occupational allergic contact urticaria
- Occupational contact urticaria
- Urticaria caused by food additive
- Urticaria caused by salicylate
- Urticaria medicamentosa
- Urticarial transfusion reaction
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L50.0: its own notes plus those printed at L50, block L49-L54, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- lipomelanotic reticulosis (I89.8)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- viral warts (B07.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name L50.0, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming L50.0: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 1
These codes carry an Excludes2 note naming L50.0: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 1
These codes say to code first a condition named in the note, and L50.0 is one of the conditions named.
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.
Patient EducationClinical
Allergy
An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L50.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L50.0Overview
What is the ICD-10 code for allergic urticaria?
The ICD-10-CM code for allergic urticaria is L50.0 (sometimes written as L500). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L50.0 (Urticaria) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report allergic urticaria on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L50.0 group to?
When allergic urticaria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 607, 606, with relative weights from 0.8772 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Can L50.0 be reported with a code from L23?
Not as a rule. The Excludes1 note at L50, which applies to L50.0, lists "allergic contact dermatitis (L23.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of L50.0?
Under the General Equivalence Mappings, allergic urticaria converts to ICD-9-CM 708.0 (allergic urticaria). The mapping is a direct match.
