2021 ICD-10-CM Diagnosis Code H49.00

Third [oculomotor] nerve palsy, unspecified eye

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • H49.00 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 H49.00 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of H49.00 - other international versions of ICD-10 H49.00 may differ.
The following code(s) above H49.00 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 H49.00:
  • H00-H59
    2021 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    Note
    • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
    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)
    • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury (trauma) of eye and orbit (S05.-)
    • 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)
    • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
    Diseases of the eye and adnexa
  • H49-H52
    2021 ICD-10-CM Range H49-H52

    Disorders of ocular muscles, binocular movement, accommodation and refraction

    Type 2 Excludes
    • nystagmus and other irregular eye movements (H55)
    Disorders of ocular muscles, binocular movement, accommodation and refraction
  • H49
    ICD-10-CM Diagnosis Code H49

    Paralytic strabismus

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • internal ophthalmoplegia (H52.51-)
    • internuclear ophthalmoplegia (H51.2-)
    • progressive supranuclear ophthalmoplegia (G23.1)
    Paralytic strabismus
Approximate Synonyms
  • Bilateral partial third cranial nerve palsy
  • Left partial third cranial nerve palsy
  • Partial third cranial nerve palsy
  • Partial third nerve palsy
  • Right partial third cranial nerve palsy
  • Third cranial nerve paralysis
  • Third cranial nerve weakness
  • Total third cranial nerve palsy
  • Total third nerve palsy
ICD-10-CM H49.00 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 123 Neurological eye disorders

Convert H49.00 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
ICD-10-CM Codes Adjacent To H49.00
H47.631 …… right side of brain
H47.632 …… left side of brain
H47.639 …… unspecified side of brain
H47.64 Disorders of visual cortex in (due to) vascular disorders
H47.641 …… right side of brain
H47.642 …… left side of brain
H47.649 …… unspecified side of brain
H47.9 Unspecified disorder of visual pathways
H49 Paralytic strabismus
H49.0 Third [oculomotor] nerve palsy
H49.00 …… unspecified eye
H49.01 …… right eye
H49.02 …… left eye
H49.03 …… bilateral
H49.1 Fourth [trochlear] nerve palsy
H49.10 …… unspecified eye
H49.11 …… right eye
H49.12 …… left eye
H49.13 …… bilateral
H49.2 Sixth [abducent] nerve palsy
H49.20 …… unspecified eye

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