Is ICD-10-CM code H55 billable?

No, H55 (Nystagmus and other irregular eye movements) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code H55 belong to?

H55 belongs to Chapter 7 of the ICD-10-CM tabular list: H00–H59 (Diseases of the Eye and Adnexa).

H55Non-billable

Nystagmus and other irregular eye movements

Diseases of the Eye and Adnexa·Other disorders of eye and adnexa (H55-H57)·category·FY 2026

Use a more specific code (0 billable, 2 non-billable)

H55.0Nystagmushas subcodes H55.8Other irregular eye movementshas subcodes

CH7 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
endocrine, nutritional and metabolic diseases (E00-E88)
injury (trauma) of eye and orbit (S05.-)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Clinical Hierarchy

BillableHas subcodes

CH7Diseases of the eye and adnexa (H00-H59)

H55-H57Other disorders of eye and adnexa (H55-H57)

H55Nystagmus and other irregular eye movementsNot billable

H55.0NystagmusSubcodes

H55.8Other irregular eye movementsSubcodes

MS-DRG Classification

2026

No direct MS-DRG triggers identified.