H55 ICD-10-CM Code: Nystagmus and other irregular eye movements
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
H55Nystagmus and other irregular eye movements
ICD-10-CM diagnosis code · United States clinical modification
Where H55 sits
- 1
Chapter 7
Diseases of the eye and adnexa (H00-H59)
- 2
Section
Other disorders of eye and adnexa (H55-H57)
- 3
Category H55
Nystagmus and other irregular eye movements
- 4
Code H55
Nystagmus and other irregular eye movements
Codes under H55
H55 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 H55.
Code first
No “code first” instruction is listed for H55.
Use additional code
No “use additional code” instruction is listed for H55.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for H55.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for H55.
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 H55 mean?
H55 is the FY 2027 U.S. ICD-10-CM code for “Nystagmus and other irregular eye movements.”
Is H55 a billable or specific ICD-10-CM code?
No. H55 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 H55 located in ICD-10-CM?
H55 is listed in Chapter 7, Diseases of the eye and adnexa (H00-H59), within Other disorders of eye and adnexa (H55-H57) (H55–H57), under category H55, Nystagmus and other irregular eye movements.
What coding notes are listed for H55?
No inclusion terms are listed for H55 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.