H44.421
✓ Billable
Hypotony of right eye due to ocular fistula
ICD-10-CM · FY2026 · Diseases of the Eye and Adnexa
Code
H44.421
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Eye and Adnexa
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code H44.421?
ICD-10-CM code H44.421 represents Hypotony of right eye due to ocular fistula. It is a billable diagnosis code in the Diseases of the Eye and Adnexa chapter, effective October 1, 2025 – September 30, 2026.
Is H44.421 billable?
Yes. H44.421 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is H44.421 in?
H44.421 belongs to the Diseases of the Eye and Adnexa chapter (H00–H59) of ICD-10-CM.
Related codes in the H44 category
H44
Disorders of globe
Non-billable
H44.0
Purulent endophthalmitis
Non-billable
H44.1
Other endophthalmitis
Non-billable
H44.2
Degenerative myopia
Non-billable
H44.3
Other and unspecified degenerative disorders of globe
Non-billable
H44.4
Hypotony of eye
Non-billable
H44.5
Degenerated conditions of globe
Non-billable
H44.6
Retained (old) intraocular foreign body, magnetic
Non-billable
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