2020 ICD-10-CM Diagnosis Code L40

Psoriasis

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • L40 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM L40 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L40 - other international versions of ICD-10 L40 may differ.
The following code(s) above L40 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 L40:
  • L00-L99
    2020 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
Clinical Information
  • A chronic disease of the skin marked by red patches covered with white scales.
  • A common genetically determined, chronic, inflammatory skin disease characterized by rounded erythematous, dry, scaling patches. Psoriatic lesions have a predilection for nails, scalp, genitalia, extensor surfaces, and the lumbosacral region; the pathology involves an accelerated epidermopoiesis. Psoriasis is associated with increased risk for melanoma, squamous cell carcinoma, and basal cell carcinoma.
  • A common genetically determined, chronic, inflammatory skin disease characterized by rounded erythematous, dry, scaling patches. The lesions have a predilection for nails, scalp, genitalia, extensor surfaces, and the lumbosacral region. Accelerated epidermopoiesis is considered to be the fundamental pathologic feature in psoriasis.
  • Common polygenetically determined, chronic, squamous dermatosis characterized by rounded erythematous, dry, scaling patches.
  • Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. You usually get them on your elbows, knees, scalp, back, face, palms and feet, but they can show up on other parts of your body. A problem with your immune system causes psoriasis. In a process called cell turnover, skin cells that grow deep in your skin rise to the surface. Normally, this takes a month. In psoriasis, it happens in just days because your cells rise too fast. Psoriasis can last a long time, even a lifetime. Symptoms come and go. Things that make them worse include
    • infections
    • stress
    • dry skin
    • certain medicines
    psoriasis usually occurs in adults. It sometimes runs in families. Treatments include creams, medications and light therapy. nih: national institute of arthritis and musculoskeletal and skin diseases
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
  • 2020 (effective 10/1/2019): No change
ICD-10-CM Codes Adjacent To L40
L29.9 Pruritus, unspecified
L30 Other and unspecified dermatitis
L30.0 Nummular dermatitis
L30.1 Dyshidrosis [pompholyx]
L30.2 Cutaneous autosensitization
L30.3 Infective dermatitis
L30.4 Erythema intertrigo
L30.5 Pityriasis alba
L30.8 Other specified dermatitis
L30.9 Dermatitis, unspecified
L40 Psoriasis
L40.0 Psoriasis vulgaris
L40.1 Generalized pustular psoriasis
L40.2 Acrodermatitis continua
L40.3 Pustulosis palmaris et plantaris
L40.4 Guttate psoriasis
L40.5 Arthropathic psoriasis
L40.50 …… unspecified
L40.51 Distal interphalangeal psoriatic arthropathy
L40.52 Psoriatic arthritis mutilans
L40.53 Psoriatic spondylitis

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