2026 ICD-10-CM Diagnosis Code H47.312Coloboma of optic disc, left eye

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.312
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H47.312 is a billable ICD-10-CM diagnosis code for coloboma of optic disc, left eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as acquired coloboma of optic disc. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.312
Billable Status
Yes — Valid for Submission
Code Describes
Coloboma of optic disc, left eye
Short Description
Coloboma of optic disc, left eye
Same as the full description in the CMS dataset.
Parent Code
H47.31
Coloboma 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 CodeH47.312Coloboma of optic disc, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired coloboma of optic disc
  • Acquired coloboma of optic disc of left eye

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 H47.312 to ICD-9-CMHistory

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

ICD-9-CM
377.23 Coloboma 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 H47.312Overview

Is H47.312 (Coloboma of optic disc) a billable code?

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

What MS-DRG does H47.312 group to?

When coloboma of optic disc, left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H47.312?

Under the General Equivalence Mappings, coloboma of optic disc, left eye converts to ICD-9-CM 377.23 (coloboma of optic disc). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.