ICD-10-CM Codes
L00-L99 Diseases of the skin and subcutaneous tissue
L49-L54 Urticaria and erythema
L50- Urticaria

2018/2019 ICD-10-CM Diagnosis Code L50

Urticaria

2016

2017

2018

2019

Non-Billable/Non-Specific Code

L50 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2018/2019 edition of ICD-10-CM L50 became effective on October 1, 2018.
This is the American ICD-10-CM version of L50 - other international versions of ICD-10 L50 may differ.

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as L50. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

allergic contact dermatitis (
ICD-10-CM Diagnosis Code L23
- L23 Allergic contact dermatitis
  - L23.0 Allergic contact dermatitis due to metals
  - L23.1 Allergic contact dermatitis due to adhesives
  - L23.2 Allergic contact dermatitis due to cosmetics
  - L23.3 Allergic contact dermatitis due to drugs in c...
  - L23.4 Allergic contact dermatitis due to dyes
  - L23.5 Allergic contact dermatitis due to other chem...
  - L23.6 Allergic contact dermatitis due to food in co...
  - L23.7 Allergic contact dermatitis due to plants, ex...
  - L23.8 Allergic contact dermatitis due to other agen...
    - L23.81 Allergic contact dermatitis due to animal (ca...
    - L23.89 Allergic contact dermatitis due to other agen...
  - L23.9 Allergic contact dermatitis, unspecified caus...
L23.-
)
angioneurotic edema (
ICD-10-CM Diagnosis Code T78.3
Angioneurotic edema
Applicable To
- Allergic angioedema
- Giant urticaria
- Quincke's edema
Type 1 Excludes
- serum urticaria (T80.6-)
- urticaria (L50.-)
T78.3
)
giant urticaria (
ICD-10-CM Diagnosis Code T78.3
Angioneurotic edema
Applicable To
- Allergic angioedema
- Giant urticaria
- Quincke's edema
Type 1 Excludes
- serum urticaria (T80.6-)
- urticaria (L50.-)
T78.3
)
hereditary angio-edema (
ICD-10-CM Diagnosis Code D84.1
Defects in the complement system
Applicable To
- C1 esterase inhibitor [C1-INH] deficiency
D84.1
)
Quincke's edema (
ICD-10-CM Diagnosis Code T78.3
Angioneurotic edema
Applicable To
- Allergic angioedema
- Giant urticaria
- Quincke's edema
Type 1 Excludes
- serum urticaria (T80.6-)
- urticaria (L50.-)
T78.3
)
serum urticaria (
ICD-10-CM Diagnosis Code T80.6
Other serum reactions
Applicable To
- Intoxication by serum
- Protein sickness
- Serum rash
- Serum sickness
- Serum urticaria
Type 2 Excludes
- serum hepatitis (B16-B19)
T80.6-
)
solar urticaria (
ICD-10-CM Diagnosis Code L56.3
Solar urticaria
L56.3
)
urticaria neonatorum (
ICD-10-CM Diagnosis Code P83.8
Other specified conditions of integument specific to newborn
P83.8
)
urticaria papulosa (
ICD-10-CM Diagnosis Code L28.2
Other prurigo
Applicable To
- Prurigo NOS
- Prurigo Hebra
- Prurigo mitis
- Urticaria papulosa
L28.2
)
urticaria pigmentosa (
ICD-10-CM Diagnosis Code Q82.2
Congenital cutaneous mastocytosis
Applicable To
- Congenital diffuse cutaneous mastocytosis
- Congenital maculopapular cutaneous mastocytosis
- Congenital urticaria pigmentosa
Type 1 Excludes
- cutaneous mastocytosis NOS (D47.01)
- diffuse cutaneous mastocytosis (with onset after newborn period) (D47.01)
- malignant mastocytosis (C96.2-)
- systemic mastocytosis (D47.02)
- urticaria pigmentosa (non-congenital) (with onset after newborn period) (D47.01)
Q82.2
)

The following code(s) above L50 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to L50:

L00-L99
2019 ICD-10-CM Range L00-L99
Diseases of the skin and subcutaneous tissue
Type 2 Excludes
- 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.-)
Diseases of the skin and subcutaneous tissue
L49-L54
2019 ICD-10-CM Range L49-L54
Urticaria and erythema
Type 1 Excludes
- Lyme disease (A69.2-)
- rosacea (L71.-)
Urticaria and erythema

Clinical Information

A disorder characterized by an itchy skin eruption characterized by wheals with pale interiors and well-defined red margins.
A raised, erythematous papule or cutaneous plaque, usually representing short-lived dermal edema
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.
An itchy skin eruption characterized by weals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugs.
An itchy skin eruption characterized by wheals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugs.
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.hives are very common. They usually go away on their own, but if you have a serious case, you might need medicine or a shot. In rare cases, allergic reactions can cause a dangerous swelling in your airways, making it hard to breathe - which is a medical emergency.
Itchy, raised red areas on the skin. Urticaria are caused by a reaction to certain foods, drugs, infections, or emotional stress.
Urticaria.
Usually transient vascular reaction involving the upper dermis, representing local edema caused by dilation and increased permeability of the capilliaries and the development of wheals.

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change

Code annotations containing back-references to L50:

Code First: F54

ICD-10-CM Diagnosis Code F54
Psychological and behavioral factors associated with disorders or diseases classified elsewhere
Applicable To
- Psychological factors affecting physical conditions
Code First
- the associated physical disorder, such as:
- asthma (J45.-)
- dermatitis (L23-L25)
- gastric ulcer (K25.-)
- mucous colitis (K58.-)
- ulcerative colitis (K51.-)
- urticaria (L50.-)
Type 2 Excludes
- tension-type headache (G44.2)
Type 1 Excludes: L95
, T78.3

ICD-10-CM Diagnosis Code L95
Vasculitis limited to skin, not elsewhere classified
Type 1 Excludes
- angioma serpiginosum (L81.7)
- Henoch(-Schönlein) purpura (D69.0)
- hypersensitivity angiitis (M31.0)
- lupus panniculitis (L93.2)
- panniculitis NOS (M79.3)
- panniculitis of neck and back (M54.0-)
- polyarteritis nodosa (M30.0)
- relapsing panniculitis (M35.6)
- rheumatoid vasculitis (M05.2)
- serum sickness (T80.6-)
- urticaria (L50.-)
- Wegener's granulomatosis (M31.3-)
ICD-10-CM Diagnosis Code T78.3
Angioneurotic edema
Applicable To
- Allergic angioedema
- Giant urticaria
- Quincke's edema
Type 1 Excludes
- serum urticaria (T80.6-)
- urticaria (L50.-)
Type 2 Excludes: L27

ICD-10-CM Diagnosis Code L27
Dermatitis due to substances taken internally
Type 1 Excludes
- allergy NOS (T78.40)
Type 2 Excludes
- adverse food reaction, except dermatitis (T78.0-T78.1)
- contact dermatitis (L23-L25)
- drug photoallergic response (L56.1)
- drug phototoxic response (L56.0)
- urticaria (L50.-)

ICD-10-CM Codes Adjacent To L50

L49.0 Exfoliation due to erythematous condition involving less than 10 percent of body surface

L49.1 Exfoliation due to erythematous condition involving 10-19 percent of body surface

L49.2 Exfoliation due to erythematous condition involving 20-29 percent of body surface

L49.3 Exfoliation due to erythematous condition involving 30-39 percent of body surface

L49.4 Exfoliation due to erythematous condition involving 40-49 percent of body surface

L49.5 Exfoliation due to erythematous condition involving 50-59 percent of body surface

L49.6 Exfoliation due to erythematous condition involving 60-69 percent of body surface

L49.7 Exfoliation due to erythematous condition involving 70-79 percent of body surface

L49.8 Exfoliation due to erythematous condition involving 80-89 percent of body surface

L49.9 Exfoliation due to erythematous condition involving 90 or more percent of body surface

L50 Urticaria

L50.0 Allergic urticaria

L50.1 Idiopathic urticaria

L50.2 Urticaria due to cold and heat

L50.3 Dermatographic urticaria

L50.4 Vibratory urticaria

L50.5 Cholinergic urticaria

L50.6 Contact urticaria

L50.8 Other urticaria

L50.9 Urticaria, unspecified

L51 Erythema multiforme

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2018/2019 ICD-10-CM Diagnosis Code L50

Urticaria

Angioneurotic edema

Angioneurotic edema

Defects in the complement system

Angioneurotic edema

Other serum reactions

Solar urticaria

Other specified conditions of integument specific to newborn

Other prurigo

Congenital cutaneous mastocytosis

Diseases of the skin and subcutaneous tissue

Urticaria and erythema

Psychological and behavioral factors associated with disorders or diseases classified elsewhere

Vasculitis limited to skin, not elsewhere classified

Angioneurotic edema

Dermatitis due to substances taken internally