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ICD-10-CM 2027 diagnosis code

H26.4Secondary cataract

Not billable — use a more specific code

H26.4 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H26.4

H26.4 is the ICD-10-CM diagnosis code for secondary cataract. It belongs to category H26 (other cataract), block H25-H28 (disorders of lens) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within H26 (other cataract), H26.4 is specifically for secondary cataract. Related codes cover infantile and juvenile cataract (H26.0), traumatic cataract (H26.1), complicated cataract (H26.2), drug-induced cataract (H26.3), other specified cataract (H26.8) and unspecified cataract (H26.9).

To report this condition, pick the subcode that matches the documentation: H26.40 (cataract), H26.41 (ring) and H26.49 (cataract).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under H26.4

Notes that apply from higher levels

Instructions written at a parent level also apply to H26.4.

› From H26 Other cataract
Excludes1
  • congenital cataract (Q12.0)

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

Codes whose notes reference H26.4

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H26.4

Is H26.4 billable?

No. H26.4 is a header code. Report one of its more specific subcodes instead.