H40 ICD-10-CM Code: Glaucoma
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
H40Glaucoma
ICD-10-CM diagnosis code · United States clinical modification
Where H40 sits
- 1
Chapter 7
Diseases of the eye and adnexa (H00-H59)
- 2
Section
Glaucoma (H40-H42)
- 3
Category H40
Glaucoma
- 4
Code H40
Glaucoma
Codes under H40
H40 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for H40.
Code first
No “code first” instruction is listed for H40.
Use additional code
No “use additional code” instruction is listed for H40.
Excludes1
Conditions that should not be reported together with this code.
- absolute glaucoma (H44.51-)
- congenital glaucoma (Q15.0)
- traumatic glaucoma due to birth injury (P15.3)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for H40.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code H40 mean?
H40 is the FY 2027 U.S. ICD-10-CM code for “Glaucoma.”
Is H40 a billable or specific ICD-10-CM code?
No. H40 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is H40 located in ICD-10-CM?
H40 is listed in Chapter 7, Diseases of the eye and adnexa (H00-H59), within Glaucoma (H40-H42) (H40–H42), under category H40, Glaucoma.
What coding notes are listed for H40?
No inclusion terms are listed for H40 in this reference record. No code-first instruction is listed. Excludes1 notes: absolute glaucoma (H44.51-); congenital glaucoma (Q15.0); traumatic glaucoma due to birth injury (P15.3). No Excludes2 note is listed.