ICD-10-CM Use Additional Code Notes · Chapter 7 · FY 2027 H00-H59

Use Additional Code Notes in Chapter 7: Diseases of the eye and adnexa ICD-10-CM

A Use Additional Code note means a second code should be added, after this one, to fully describe the condition. In Chapter 7 (H00-H59), notes printed in the chapter name other codes 13 times, and Use Additional Code Notes anywhere in the Tabular List name the chapter’s codes 27 times, covering 20 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
13
References in Its Notes
27
References to Its Codes
20
Chapter Codes Named
H00-H59
Chapter 7
Chapter 7

Use Additional Code Notes by the code that carries the note

11 of 11 shown
  • H02.81 Retained foreign body in eyelid applies to 7 codes
    • code to identify the type of retained foreign body (Z18.-)
  • H05.5 Retained (old) foreign body following penetrating wound of orbit applies to 4 codes
    • code to identify the type of retained foreign body (Z18.-)
  • H20.1 Chronic iridocyclitis applies to 4 codes
    • code for any associated cataract (H26.21-)
  • H21.81 Floppy iris syndrome
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • H26.3 Drug-induced cataract applies to 4 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • H35.38 Toxic maculopathy applies to 4 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • H40.6 Glaucoma secondary to drugs applies to 20 codes
    • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • H44.2A Degenerative myopia with choroidal neovascularization applies to 4 codes
    • code for any associated choroid disorders (H31.-)
  • H44.2C Degenerative myopia with retinal detachment applies to 4 codes
    • code to identify the retinal detachment (H33.-)
  • H44.6 Retained (old) intraocular foreign body, magnetic applies to 28 codes
    • code to identify magnetic foreign body (Z18.11)
  • H44.7 Retained (old) intraocular foreign body, nonmagnetic applies to 28 codes

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Use Additional Code Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Use Additional Code Notes

What does a Use Additional Code note mean?

A Use Additional Code note tells you to add a second code, reported after the code that carries the note, to describe the condition completely. In an etiology/manifestation pair it sits at the etiology code and points to the manifestation (Section I.A.13). The FY 2027 Tabular List has 1,491 of them; 1,174 name other codes, with 1,438 references to 389 distinct codes, categories and ranges.

Where does the additional code go?

After the code carrying the note. For etiology/manifestation pairs the Guidelines are explicit: the etiology is sequenced first, followed by the manifestation code.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.