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2. ICD-10 Codes
3. Chapter - H00-H59
4. Section - H49-H52
5. Category - H52
6. H52.21

H52.21 - Irregular astigmatism

• Applicable to Irregular astigmatism
• The 2025 edition of ICD10-CM H52.21 became effective on October 1, 2024.
• This is the American ICD10-CM version of H52.21 - other international versions of ICD10 H52.21 may differ.
• H52.21 is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• H52.21 Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.

The following codes above H52.21 contain annotation back-references that may be applicable to H52.21:

• Chapter: H00-H59 - Diseases of the eye and adnexa
• Section: H49-H52 - Disorders of ocular muscles, binocular movement, accommodation and refraction
• Category: H52 - Disorders of refraction and accommodation

Browse other similar CM codes:

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