2019 ICD-10-CM Diagnosis Code G51.0

Bell's palsy

    2016 2017 2018 2019 Billable/Specific Code
  • G51.0 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 G51.0 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of G51.0 - other international versions of ICD-10 G51.0 may differ.
Applicable To
  • Facial palsy
The following code(s) above G51.0 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 G51.0:
  • G00-G99
    2019 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
  • G50-G59
    2019 ICD-10-CM Range G50-G59

    Nerve, nerve root and plexus disorders

    Type 1 Excludes
    • current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
    • neuralgia NOS (M79.2)
    • neuritis NOS (M79.2)
    • peripheral neuritis in pregnancy (O26.82-)
    • radiculitis NOS (M54.1-)
    Nerve, nerve root and plexus disorders
  • G51
    ICD-10-CM Diagnosis Code G51

    Facial nerve disorders

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Includes
    • disorders of 7th cranial nerve
    Facial nerve disorders
Approximate Synonyms
  • Bell's palsy of left face
  • Bell's palsy of right face
  • Bells palsy
  • Bells palsy of left side of face
  • Bells palsy of right side of face
  • Facial nerve paralysis
  • Facial palsy
  • Facial palsy grade 1
  • Facial palsy grade 2
  • Facial palsy grade 3
  • Facial palsy grade 4
  • Facial palsy grade 5
  • Facial palsy grade 6
  • Left facial palsy
  • Left facial palsy house-brackmann grade 1
  • Left facial palsy house-brackmann grade 2
  • Left facial palsy house-brackmann grade 3
  • Left facial palsy house-brackmann grade 4
  • Left facial palsy house-brackmann grade 5
  • Left facial palsy house-brackmann grade 6
  • Right facial palsy
  • Right facial palsy house-brackmann grade 1
  • Right facial palsy house-brackmann grade 2
  • Right facial palsy house-brackmann grade 3
  • Right facial palsy house-brackmann grade 4
  • Right facial palsy house-brackmann grade 5
  • Right facial palsy house-brackmann grade 6
Clinical Information
  • A syndrome characterized by the acute onset of unilateral facial paralysis which progresses over a 2-5 day period. Weakness of the orbicularis oculi muscle and resulting incomplete eye closure may be associated with corneal injury. Pain behind the ear often precedes the onset of paralysis. This condition may be associated with herpesvirus 1, human infection of the facial nerve. (Adams et al., Principles of Neurology, 6th ed, p1376)
  • If you have bell's palsy, the muscles in your face become temporarily paralyzed. It usually affects just one side of the face. Symptoms appear suddenly - you can't shut your eye and your mouth droops. Symptoms are usually worst about 48 hours after they start. Scientists think that a viral infection makes the facial nerve swell or become inflamed. You are most likely to get bell's palsy if you are pregnant, diabetic or sick with a cold or flu.three in four patients improve without treatment. With or without treatment, most people begin to get better within 2 weeks and most recover completely within 3 to 6 months.
  • Partial or complete paralysis of the facial muscles of one side of a person's face. It is caused by damage to the seventh cranial nerve. It is usually temporary but it may recur.
  • Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to cns motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. Facial nerve diseases generally results in generalized hemifacial weakness. Neuromuscular junction diseases and muscular diseases may also cause facial paralysis or paresis.
  • Severe or complete loss of facial muscle motor function; this condition may result from central or peripheral lesions; damage to cns motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles; facial nerve diseases generally results in generalized hemifacial weakness; neuromuscular junction diseases and muscular diseases may also cause facial paralysis.
  • Temporary facial paralysis resulting from damage
ICD-10-CM G51.0 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 073 Cranial and peripheral nerve disorders with mcc
  • 074 Cranial and peripheral nerve disorders without mcc

Convert G51.0 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
Code annotations containing back-references to G51.0:
  • Type 1 Excludes: R29.810
    ICD-10-CM Diagnosis Code R29.810

    Facial weakness

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Facial droop
    Type 1 Excludes
    • Bell's palsy (G51.0)
    • facial weakness following cerebrovascular disease (I69. with final characters -92)

Diagnosis Index entries containing back-references to G51.0:
  • Bell's
  • Diplegia (upper limbs) G83.0
    ICD-10-CM Diagnosis Code G83.0

    Diplegia of upper limbs

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Diplegia (upper)
    • Paralysis of both upper limbs
    • facial G51.0
  • Neuritis (rheumatoid) M79.2
    ICD-10-CM Diagnosis Code M79.2

    Neuralgia and neuritis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Type 1 Excludes
  • Palsy G83.9
    - see also Paralysis
    ICD-10-CM Diagnosis Code G83.9

    Paralytic syndrome, unspecified

      2016 2017 2018 2019 Billable/Specific Code
  • Paralysis, paralytic (complete) (incomplete) G83.9
    ICD-10-CM Diagnosis Code G83.9

    Paralytic syndrome, unspecified

      2016 2017 2018 2019 Billable/Specific Code
  • Spasm(s) R25.2
    - see also condition
    ICD-10-CM Diagnosis Code R25.2

    Cramp and spasm

      2016 2017 2018 2019 Billable/Specific Code
    Type 2 Excludes
    • nerve, trigeminal G51.0

ICD-10-CM Codes Adjacent To G51.0
G47.63 Sleep related bruxism
G47.69 Other sleep related movement disorders
G47.8 Other sleep disorders
G47.9 Sleep disorder, unspecified
G50 Disorders of trigeminal nerve
G50.0 Trigeminal neuralgia
G50.1 Atypical facial pain
G50.8 Other disorders of trigeminal nerve
G50.9 Disorder of trigeminal nerve, unspecified
G51 Facial nerve disorders
G51.0 Bell's palsy
G51.1 Geniculate ganglionitis
G51.2 Melkersson's syndrome
G51.3 Clonic hemifacial spasm
G51.31 …… right
G51.32 …… left
G51.33 …… bilateral
G51.39 …… unspecified
G51.4 Facial myokymia
G51.8 Other disorders of facial nerve
G51.9 Disorder of facial nerve, unspecified

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