2021

  1. ICD-10-CM Codes
    2. ›
  2. G00-G99 Diseases of the nervous system
    3. ›
  3. G89-G99 Other disorders of the nervous system
    4. ›
  4. G90- Disorders of autonomic nervous system
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code G90.3

2021 ICD-10-CM Diagnosis Code G90.3

Multi-system degeneration of the autonomic nervous system

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • G90.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM G90.3 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G90.3 - other international versions of ICD-10 G90.3 may differ.
Applicable To
  • Neurogenic orthostatic hypotension [Shy-Drager]
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 G90.3. 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.
  • orthostatic hypotension NOS (
    ICD-10-CM Diagnosis Code I95.1

    Orthostatic hypotension

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Hypotension, postural
    Type 1 Excludes
    • neurogenic orthostatic hypotension [Shy-Drager] (G90.3)
    • orthostatic hypotension due to drugs (I95.2)
    I95.1
    )
The following code(s) above G90.3 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 G90.3:
  • G00-G99
    2021 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    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)
    • 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 nervous system
  • G90
    ICD-10-CM Diagnosis Code G90

    Disorders of autonomic nervous system

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dysfunction of the autonomic nervous system due to alcohol (G31.2)
    Disorders of autonomic nervous system
Approximate Synonyms
  • Multi-system degeneration of autonomic nervous system
  • Multiple system atrophy, parkinson's variant
  • Multisystem degeneration of autonomic nervous system
  • Parkinsonism with orthostatic hypotension
  • Parkinsons variant
  • Shy drager syndrome
ICD-10-CM G90.3 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G90.3 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
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to G90.3:
  • Type 1 Excludes: I95.1
    , R03.1
    , R55
    , G21
    ICD-10-CM Diagnosis Code I95.1

    Orthostatic hypotension

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Hypotension, postural
    Type 1 Excludes
    • neurogenic orthostatic hypotension [Shy-Drager] (G90.3)
    • orthostatic hypotension due to drugs (I95.2)
    ICD-10-CM Diagnosis Code R03.1

    Nonspecific low blood-pressure reading

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Type 1 Excludes
    • hypotension (I95.-)
    • maternal hypotension syndrome (O26.5-)
    • neurogenic orthostatic hypotension (G90.3)
    ICD-10-CM Diagnosis Code R55

    Syncope and collapse

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Blackout
    • Fainting
    • Vasovagal attack
    Type 1 Excludes
    • cardiogenic shock (R57.0)
    • carotid sinus syncope (G90.01)
    • heat syncope (T67.1)
    • neurocirculatory asthenia (F45.8)
    • neurogenic orthostatic hypotension (G90.3)
    • orthostatic hypotension (I95.1)
    • postprocedural shock (T81.1-)
    • psychogenic syncope (F48.8)
    • shock NOS (R57.9)
    • shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)
    • shock complicating or following labor and delivery (O75.1)
    • Stokes-Adams attack (I45.9)
    • unconsciousness NOS (R40.2-)
    ICD-10-CM Diagnosis Code G21

    Secondary parkinsonism

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dementia with Parkinsonism (G31.83)
    • Huntington's disease (G10)
    • Shy-Drager syndrome (G90.3)
    • syphilitic Parkinsonism (A52.19)
  • Type 2 Excludes: G23
    ICD-10-CM Diagnosis Code G23

    Other degenerative diseases of basal ganglia

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • multi-system degeneration of the autonomic nervous system (G90.3)

Diagnosis Index entries containing back-references to G90.3:
  • Degeneration, degenerative
    • multi-system G90.3
  • Hypotension (arterial) (constitutional) I95.9
    ICD-10-CM Diagnosis Code I95.9

    Hypotension, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • neurogenic, orthostatic G90.3
    • orthostatic (chronic) I95.1
      ICD-10-CM Diagnosis Code I95.1

      Orthostatic hypotension

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Hypotension, postural
      Type 1 Excludes
      • neurogenic orthostatic hypotension [Shy-Drager] (G90.3)
      • orthostatic hypotension due to drugs (I95.2)
      • neurogenic G90.3
  • Parkinsonism (idiopathic) (primary) G20
    ICD-10-CM Diagnosis Code G20

    Parkinson's disease

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Hemiparkinsonism
    • Idiopathic Parkinsonism or Parkinson's disease
    • Paralysis agitans
    • Parkinsonism or Parkinson's disease NOS
    • Primary Parkinsonism or Parkinson's disease
    Type 1 Excludes
    • dementia with Parkinsonism (G31.83)
    Use Additional
    • code to identify:
    • dementia with behavioral disturbance (F02.81)
    • dementia without behavioral disturbance (F02.80)
    • with neurogenic orthostatic hypotension G90.3 (symptomatic)
  • Shy-Drager syndrome G90.3

ICD-10-CM Codes Adjacent To G90.3
G89.28 Other chronic postprocedural pain
G89.29 Other chronic pain
G89.3 Neoplasm related pain (acute) (chronic)
G89.4 Chronic pain syndrome
G90 Disorders of autonomic nervous system
G90.0 Idiopathic peripheral autonomic neuropathy
G90.01 Carotid sinus syncope
G90.09 Other idiopathic peripheral autonomic neuropathy
G90.1 Familial dysautonomia [Riley-Day]
G90.2 Horner's syndrome
G90.3 Multi-system degeneration of the autonomic nervous system
G90.4 Autonomic dysreflexia
G90.5 Complex regional pain syndrome I (CRPS I)
G90.50 Complex regional pain syndrome I, unspecified
G90.51 Complex regional pain syndrome I of upper limb
G90.511 Complex regional pain syndrome I of right upper limb
G90.512 Complex regional pain syndrome I of left upper limb
G90.513 …… bilateral
G90.519 Complex regional pain syndrome I of unspecified upper limb
G90.52 Complex regional pain syndrome I of lower limb
G90.521 Complex regional pain syndrome I of right lower limb

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

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