2022 ICD-10-CM Diagnosis Code H18.20

Unspecified corneal edema

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • H18.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM H18.20 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of H18.20 - other international versions of ICD-10 H18.20 may differ.
The following code(s) above H18.20 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 H18.20:
  • H00-H59
    2022 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    • 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
Approximate Synonyms
  • Bilateral corneal edema
  • Bilateral corneal infiltrate
  • Bilateral microcystic corneal edema
  • Bilateral stromal corneal edema
  • Corneal edema
  • Corneal infiltrate
  • Edema of corneal stroma of bilateral eyes
  • Edema of corneal stroma of left eye
  • Edema of corneal stroma of right eye
  • Fine corneal edema
  • Infiltrate of cornea
  • Left corneal edema
  • Left corneal infiltrate
  • Left microcystic corneal edema
  • Left stromal corneal edema
  • Microcystic corneal edema (mce)
  • Right corneal edema
  • Right corneal infiltrate
  • Right microcystic corneal edema
  • Right stromal corneal edema
Clinical Information
  • An excessive amount of fluid in the cornea due to damage of the epithelium or endothelium causing decreased visual acuity.
  • Excessive amount of fluid in the transparent anterior portion of the fibrous coat of the eye due to damage of the epithelium or endothelium, causing decreased visual acuity.
  • Hazy, swollen cornea.
ICD-10-CM H18.20 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 124 Other disorders of the eye with mcc
  • 125 Other disorders of the eye without mcc

Convert H18.20 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
  • 2022 (effective 10/1/2021): No change
ICD-10-CM Codes Adjacent To H18.20
H18.061 …… right eye
H18.062 …… left eye
H18.063 …… bilateral
H18.069 …… unspecified eye
H18.1 Bullous keratopathy
H18.10 …… unspecified eye
H18.11 …… right eye
H18.12 …… left eye
H18.13 …… bilateral
H18.2 Other and unspecified corneal edema
H18.20 Unspecified corneal edema
H18.21 Corneal edema secondary to contact lens
H18.211 …… right eye
H18.212 …… left eye
H18.213 …… bilateral
H18.219 …… unspecified eye
H18.22 Idiopathic corneal edema
H18.221 …… right eye
H18.222 …… left eye
H18.223 …… bilateral
H18.229 …… unspecified eye

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