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  6. 2024 ICD-10-CM Code H52.21
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code H52.21

Irregular astigmatism

ICD-10-CM Code:
H52.21
ICD-10 Code for:
Irregular astigmatism
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the eye and adnexa
    (H00–H59)
    • Disorders of ocular muscles, binocular movement, accommodation and refraction
      (H49-H52)
      • Disorders of refraction and accommodation
        (H52)

H52.21 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of irregular astigmatism. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Irregular astigmatism

Non-specific codes like H52.21 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for irregular astigmatism:

  • Use H52.211 for Irregular astigmatism, right eye - BILLABLE CODE

  • Use H52.212 for Irregular astigmatism, left eye - BILLABLE CODE

  • Use H52.213 for Irregular astigmatism, bilateral - BILLABLE CODE

  • Use H52.219 for Irregular astigmatism, unspecified eye - BILLABLE CODE

Clinical Information

  • Astigmatism

    unequal or irregular curvature of the cornea (corneal astigmatism) and/or the eye lens (lenticular astigmatism) resulting in refractive error.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.