ICD-10-CM 2027
ICD-10 code for Hippus
From the official ICD-10-CM alphabetic index entry “Hippus”. Page updated September 29, 2026.
About coding Hippus
The ICD-10-CM code for Hippus is H57.09 (Other anomalies of pupillary function).
Within H57.0, choose H57.09 (Other anomalies of pupillary function) only when documentation doesn't support a more specific option: unspecified anomaly of pupillary function (H57.00), Argyll Robertson pupil, atypical (H57.01), Anisocoria (H57.02), Miosis (H57.03), Mydriasis (H57.04) and Tonic pupil (H57.05).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 123 (Neurological Eye Disorders, relative weight 0.822), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Hippus ICD-10 codes
What is the ICD-10 code for Hippus?
- H57.09 — Other anomalies of pupillary function.
Is H57.09 billable?
- Yes. H57.09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H57.09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H57.09 as a principal diagnosis.
Is H57.09 a CC or MCC?
- No. H57.09 is neither a CC nor an MCC under MS-DRG v44.0.