ICD-10-CM 2027
ICD-10 code for dark adaptation curve abnormal
From the official ICD-10-CM alphabetic index entry “Abnormal, abnormality, abnormalities › dark adaptation curve”. Page updated September 29, 2026.
About coding dark adaptation curve abnormal
The ICD-10-CM code for dark adaptation curve abnormal is H53.61 (Abnormal dark adaptation curve).
Within H53.6 (night blindness), H53.61 is specifically for abnormal dark adaptation curve. Related codes cover unspecified night blindness (H53.60), acquired night blindness (H53.62), congenital night blindness (H53.63) and other night blindness (H53.69).
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 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), 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 dark adaptation curve abnormal ICD-10 codes
What is the ICD-10 code for dark adaptation curve abnormal?
- H53.61 — Abnormal dark adaptation curve.
Is H53.61 billable?
- Yes. H53.61 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H53.61 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H53.61 as a principal diagnosis.
Is H53.61 a CC or MCC?
- No. H53.61 is neither a CC nor an MCC under MS-DRG v44.0.