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ICD-10-CM 2027 diagnosis code

H31.12Diffuse secondary atrophy of choroid

Not billable — use a more specific code

H31.12 is a header code, so it can't be reported by itself. Choose one of the 4 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 H31.12

H31.12 is the ICD-10-CM diagnosis code for diffuse secondary atrophy of choroid. It belongs to category H31 (other disorders of choroid), block H30-H36 (disorders of choroid and retina) 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 4 subcodes must be used instead.

Within H31.1 (choroidal degeneration), H31.12 is specifically for diffuse secondary atrophy of choroid. Related codes cover unspecified choroidal degeneration (H31.10) and age-related choroidal atrophy (H31.11).

To report this condition, pick the subcode that matches the documentation: H31.121 (right eye), H31.122 (left eye), H31.123 (bilateral) and H31.129 (unspecified eye).

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 H31.12

Notes that apply from higher levels

Instructions written at a parent level also apply to H31.12.

› From H31.1 Choroidal degeneration
Excludes2
  • angioid streaks of macula (H35.33)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to H31.12.

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 H31.12

Is H31.12 billable?

No. H31.12 is a header code. Report one of its more specific subcodes instead.