2019 ICD-10-CM Diagnosis Code M33.90

Dermatopolymyositis, unspecified, organ involvement unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • M33.90 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Dermatopolymyositis, unsp, organ involvement unspecified
  • The 2019 edition of ICD-10-CM M33.90 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of M33.90 - other international versions of ICD-10 M33.90 may differ.
The following code(s) above M33.90 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 M33.90:
  • M00-M99
    2019 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M30-M36
    2019 ICD-10-CM Range M30-M36

    Systemic connective tissue disorders

    Includes
    • autoimmune disease NOS
    • collagen (vascular) disease NOS
    • systemic autoimmune disease
    • systemic collagen (vascular) disease
    Type 1 Excludes
    • autoimmune disease, single organ or single cell-type -code to relevant condition category
    Systemic connective tissue disorders
Approximate Synonyms
  • Dermatomyositis
Clinical Information
  • A subacute or chronic inflammatory disease of muscle and skin, marked by proximal muscle weakness and a characteristic skin rash. The illness occurs with approximately equal frequency in children and adults. The skin lesions usually take the form of a purplish rash (or less often an exfoliative dermatitis) involving the nose, cheeks, forehead, upper trunk, and arms. The disease is associated with a complement mediated intramuscular microangiopathy, leading to loss of capillaries, muscle ischemia, muscle-fiber necrosis, and perifascicular atrophy. The childhood form of this disease tends to evolve into a systemic vasculitis. Dermatomyositis may occur in association with malignant neoplasms. (from Adams et al., Principles of Neurology, 6th ed, pp1405-6)
  • An inflammatory muscle disease accompanied by muscle weakness and skin rash
  • Progressive condition characterized by symmetric proximal muscular weakness with elevated serum levels of muscle enzymes and a skin rash, typically a purplish-red erythema on the face, and edema of the eyelids and periorbital tissue; affected muscle tissue shows degeneration of fibers with a chronic inflammatory reaction; occurs in children and adults, and in the latter may be associated with visceral cancer or other disorders of connective tissue.
ICD-10-CM M33.90 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 M33.90 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 M33.90:

ICD-10-CM Codes Adjacent To M33.90
M33.11 …… with respiratory involvement
M33.12 …… with myopathy
M33.13 …… without myopathy
M33.19 …… with other organ involvement
M33.2 Polymyositis
M33.20 …… organ involvement unspecified
M33.21 …… with respiratory involvement
M33.22 …… with myopathy
M33.29 …… with other organ involvement
M33.9 Dermatopolymyositis, unspecified
M33.90 …… organ involvement unspecified
M33.91 …… with respiratory involvement
M33.92 …… with myopathy
M33.93 …… without myopathy
M33.99 …… with other organ involvement
M34 Systemic sclerosis [scleroderma]
M34.0 Progressive systemic sclerosis
M34.1 CR(E)ST syndrome
M34.2 Systemic sclerosis induced by drug and chemical
M34.8 Other forms of systemic sclerosis
M34.81 Systemic sclerosis with lung involvement

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