2022 ICD-10-CM Diagnosis Code H16.9: Unspecified Keratitis

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2026

  1. ICD-10-CM Codes
    2. ›
  2. H00-H59
    3. ›
  3. H15-H22
    4. ›
  4. H16-
    5. ›
  5. 2026 ICD-10-CM Diagnosis Code H16.9
2026 ICD-10-CM Diagnosis Code H16.9

Unspecified keratitis

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code
  • H16.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2026 edition of ICD-10-CM H16.9 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of H16.9 - other international versions of ICD-10 H16.9 may differ.
The following code(s) above H16.9 contain annotation back-referencesAnnotation Back-ReferencesIn 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 H16.9:
  • H00-H59 2026 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexaNote
    • 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 contact lens keratitis, unresolved
  • Contact lens keratitis, unresolved
  • Keratitis
  • Keratitis (eye condition)
  • Keratitis ichthyosis and deafness syndrome
  • Kid syndrome
  • Kid syndrome (eye condition)
  • Left contact lens keratitis, unresolved
  • Right contact lens keratitis, unresolved
  • Unresolved contact lens keratitis
  • Unresolved keratitis of bilateral eyes caused by contact lens
  • Unresolved keratitis of left eye caused by contact lens
  • Unresolved keratitis of right eye caused by contact lens
Clinical Information
  • A disorder characterized by inflammation to the cornea of the eye.
  • Inflammation of the cornea
  • Inflammation of the cornea.
ICD-10-CM H16.9 is grouped within Diagnostic Related Group(s) (MS-DRG v43.0):
  • 124 Other disorders of the eye with mcc or thrombolytic agent
  • 125 Other disorders of the eye without mcc

Convert H16.9 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
  • 2026 (effective 10/1/2025): No change

Diagnosis Index entries containing back-references to H16.9:

  • Keratitis (nodular) (nonulcerative) (simple) (zonular) H16.9

ICD-10-CM Codes Adjacent To H16.9 H16.431 …… right eye H16.432 …… left eye H16.433 …… bilateral H16.439 …… unspecified eye H16.44 Deep vascularization of cornea H16.441 …… right eye H16.442 …… left eye H16.443 …… bilateral H16.449 …… unspecified eye H16.8 Other keratitis H16.9 Unspecified keratitis H17 Corneal scars and opacities H17.0 Adherent leukoma H17.00 …… unspecified eye H17.01 …… right eye H17.02 …… left eye H17.03 …… bilateral H17.1 Central corneal opacity H17.10 …… unspecified eye H17.11 …… right eye H17.12 …… left eye

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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