2019 ICD-10-CM Diagnosis Code L40.50

Arthropathic psoriasis, unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • L40.50 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM L40.50 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of L40.50 - other international versions of ICD-10 L40.50 may differ.
The following code(s) above L40.50 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 L40.50:
  • 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
Approximate Synonyms
  • Psoriasis with arthropathy
  • Psoriatic arthritis
Clinical Information
  • A type of inflammatory arthritis associated with psoriasis, often involving the axial joints and the peripheral terminal interphalangeal joints. It is characterized by the presence of hla-b27-associated spondylarthropathy, and the absence of rheumatoid factor.
  • Joint inflammation associated with psoriasis.
  • Syndrome of psoriasis in association with inflammation, arthritis; rheumatoid factor is usually not present in the sera of affected individuals.
ICD-10-CM L40.50 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 545 Connective tissue disorders with mcc
  • 546 Connective tissue disorders with cc
  • 547 Connective tissue disorders without cc/mcc

Convert L40.50 to ICD-9-CM

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

Diagnosis Index entries containing back-references to L40.50:
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
    ICD-10-CM Diagnosis Code M19.90

    Unspecified osteoarthritis, unspecified site

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Arthrosis NOS
    • Arthritis NOS
    • Osteoarthritis NOS
    • in (due to)
      • psoriasis L40.50
    • psoriatic L40.50
  • Arthropathy M12.9
    - see also Arthritis
    ICD-10-CM Diagnosis Code M12.9

    Arthropathy, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    • in (due to)
      • psoriasis NOS L40.50
  • Psoriasis L40.9
    ICD-10-CM Diagnosis Code L40.9

    Psoriasis, unspecified

      2016 2017 2018 2019 Billable/Specific Code

ICD-10-CM Codes Adjacent To L40.50
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
L40.54 Psoriatic juvenile arthropathy
L40.59 Other psoriatic arthropathy
L40.8 Other psoriasis
L40.9 Psoriasis, unspecified
L41 Parapsoriasis
L41.0 Pityriasis lichenoides et varioliformis acuta
L41.1 Pityriasis lichenoides chronica

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