2026 ICD-10-CM Diagnosis Code H47.321Drusen of optic disc, right eye

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.321
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H47.321 is a billable ICD-10-CM diagnosis code for drusen of optic disc, right eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as drusen of optic disc. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.321
Billable Status
Yes — Valid for Submission
Code Describes
Drusen of optic disc, right eye
Short Description
Drusen of optic disc, right eye
Same as the full description in the CMS dataset.
Parent Code
H47.32
Drusen of optic disc

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH46-H47Disorders of optic nerve and visual pathways
CategoryH47Other disorders of optic [2nd] nerve and visual pathways
This CodeH47.321Drusen of optic disc, right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Drusen of optic disc
  • Drusen of retina of right eye
  • Drusen of right optic disc

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE006
Neuro-ophthalmology
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Optic Nerve Disorders

The optic nerve is a bundle of more than 1 million nerve fibers that carry visual messages. You have one connecting the back of each eye (your retina) to your brain. Damage to an optic nerve can cause vision loss. The type of vision loss and how severe it is depends on where the damage occurs. It may affect one or both eyes.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H47.321 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
377.21 Drusen of optic disc
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H47.321Overview

Is H47.321 (Drusen of optic disc) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report drusen of optic disc, right eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of H47.321?

Under the General Equivalence Mappings, drusen of optic disc, right eye converts to ICD-9-CM 377.21 (drusen of optic disc). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.