H10.40 – Unspecified chronic conjunctivitis
ICD-10-CM 2027 diagnosis code · Disorders of conjunctiva
ICD-10-CM code
H10.40
- Code
H10.40(claims format:H1040)- Description
- Unspecified chronic conjunctivitis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 7. Diseases of the eye and adnexa (H00-H59)
- Block
- H10-H11 Disorders of conjunctiva
- Parent codes
- H10 › H10.4
Billable codes under H10.40
H10.40 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
H10 – Conjunctivitis
Excludes1 (not coded here):
- keratoconjunctivitis (H16.2-)
Index terms for H10.40
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in H10.4
Frequently asked questions
What is ICD-10 code H10.40?
H10.40 is the ICD-10-CM code for unspecified chronic conjunctivitis, in the block H10-H11 (Disorders of conjunctiva).
Is H10.40 a billable code?
No. H10.40 is a header code with more specific child codes; report one of the billable codes listed above.
What category does H10.40 belong to?
It belongs to category H10 – Conjunctivitis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.