2020 ICD-10-CM Diagnosis Code M35.9

Systemic involvement of connective tissue, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M35.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M35.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M35.9 - other international versions of ICD-10 M35.9 may differ.
Applicable To
  • Autoimmune disease (systemic) NOS
  • Collagen (vascular) disease NOS
The following code(s) above M35.9 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 M35.9:
  • M00-M99
    2020 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
    2020 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
  • M35
    ICD-10-CM Diagnosis Code M35

    Other systemic involvement of connective tissue

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • reactive perforating collagenosis (L87.1)
    Other systemic involvement of connective tissue
Approximate Synonyms
  • Autoimmune disease
  • Autoimmune disorder
  • Autoimmune disorder of inner ear
  • Autoimmune inner ear disease
  • Bilateral autoimmune disorder of inner ear
  • Bilateral autoimmune sensorineural hearing loss
  • Both sides autoimmune inner ear disease
  • Both sides autoimmune sensorineural hearing loss
  • Collagen disease
  • Connective tissue disease w systemic involvement
  • Connective tissue disease, systemic involvement
  • Connective tissue disorder
  • Disorder of connective tissue
  • Disorder of connective tissue with systemic involvement
  • Hemolytic anemia associated with chronic inflammatory disease
  • Hemolytic anemia associated with systemic lupus erythematosus
  • Hemolytic anemia due to chronic inflammatory disease
  • Hemolytic anemia with systemic lupus erythematosus
  • Interstitial lung disease due to collagen vascular disease
  • Left autoimmune inner ear disease
  • Left autoimmune sensorineural hearing loss
  • Left sided autoimmune disorder of inner ear
  • Lung disease in collagen vascular disease
  • Mixed collagen vascular disease
  • Mixed connective tissue disease
  • Polyneuropathy (multiple nerve disorder)
  • Polyneuropathy due to collagen vascular disease
  • Polyneuropathy in collagen vascular disease
  • Polyneuropathy in collagen vascular disease with polyarteritis
  • Right autoimmune inner ear disease
  • Right autoimmune sensorineural hearing loss
  • Right sided autoimmune disorder of inner ear
  • Undifferentiated connective tissue disease
ICD-10-CM M35.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 545 Connective tissue disorders with mcc
  • 546 Connective tissue disorders with cc
  • 547 Connective tissue disorders without cc/mcc

Convert M35.9 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
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to M35.9:
  • Code First: G32.81
    ICD-10-CM Diagnosis Code G32.81

    Cerebellar ataxia in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • celiac disease (with gluten ataxia) (K90.0)
    • cerebellar ataxia (in) neoplastic disease (paraneoplastic cerebellar degeneration) (C00-D49)
    • non-celiac gluten ataxia (M35.9)
    Type 1 Excludes
    • systemic atrophy primarily affecting the central nervous system in alcoholic cerebellar ataxia (G31.2)
    • systemic atrophy primarily affecting the central nervous system in myxedema (G13.2)

Diagnosis Index entries containing back-references to M35.9:

ICD-10-CM Codes Adjacent To M35.9
M35.04 Sicca syndrome with tubulo-interstitial nephropathy
M35.09 Sicca syndrome with other organ involvement
M35.1 Other overlap syndromes
M35.2 Behçet's disease
M35.3 Polymyalgia rheumatica
M35.4 Diffuse (eosinophilic) fasciitis
M35.5 Multifocal fibrosclerosis
M35.6 Relapsing panniculitis [Weber-Christian]
M35.7 Hypermobility syndrome
M35.8 Other specified systemic involvement of connective tissue
M35.9 Systemic involvement of connective tissue, unspecified
M36 Systemic disorders of connective tissue in diseases classified elsewhere
M36.0 Dermato(poly)myositis in neoplastic disease
M36.1 Arthropathy in neoplastic disease
M36.2 Hemophilic arthropathy
M36.3 Arthropathy in other blood disorders
M36.4 Arthropathy in hypersensitivity reactions classified elsewhere
M36.8 Systemic disorders of connective tissue in other diseases classified elsewhere
M40 Kyphosis and lordosis
M40.0 Postural kyphosis
M40.00 …… site unspecified

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